JP2007193937A - Imaging device and imaging method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To effectively use a data area of a disc recording medium when an image of a subject is digitized and recorded in the form of still image data, for example. <P>SOLUTION: When data input from a data input section is recorded onto the disk recording medium loaded in a housing using a recording means in recording sections 31, 32, a recording control means 28 generates first image data from an image signal obtained by imaging the subject, and generating second image data corresponding to the first image data. When the first image data and the second image data are recorded onto the disk recording medium, the recording control means 28 records the first and second image data from the opposite ends of the disk recording medium, respectively. When an impact having a predetermined value or more has been detected as a result of detection by an impact detecting section 33 for detecting an impact on the housing, the recording control means 28 controls the recording sections 31, 32 to stop the recording of the data onto the disk recording medium. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a data recording apparatus and a data recording method, for example, an imaging apparatus and an imaging method for digitizing an image of a subject and recording it in the form of still image data.

  In recent years, with the spread of personal computers and the like, the popularity of digital camera devices that digitize and record images as image recording devices has increased. This digital camera device digitizes an image as a subject and records it as a predetermined number of still image data on a predetermined recording medium such as a flash memory, and then outputs the still image to a monitor of a personal computer. It is common to be able to.

Japanese Patent Laid-Open No. 04-212582 JP 07-274108 A Japanese Patent Application Laid-Open No. 06-231023 Japanese Patent Laid-Open No. 08-037638 Japanese Patent Application Laid-Open No. 06-044318

  A conventional digital camera device uses a built-in flash memory or a card-type flash memory that can be inserted and removed as a recording medium for the image data.

  However, in conventional digital camera devices, since these memories have a high unit price per shot and are not suitable as storage media, still image data shot on a hard disk or a flexible disk in a personal computer after shooting is stored. It was necessary to transfer and copy, and this data transfer required a lot of time and effort.

  In addition, with conventional digital camera devices, the price of these memories is high and the number of images that can be held by the user is limited, so the number of images that can be taken is limited. There was a problem that it was restricted to.

  In addition, when a strong impact is applied to the entire flexible disk drive, the housing and head arm bend, resulting in a positional deviation or poor contact of the magnetic head with respect to the recording track of the magnetic disk. It may cause erosion or writing failure on the current track.

  The present invention has been proposed in view of the above circumstances, and an object thereof is to provide an imaging apparatus and an imaging method capable of effectively using a data area of a disk recording medium.

  Other objects of the present invention and specific advantages obtained by the present invention will become more apparent from the description of embodiments described below.

  An imaging apparatus according to the present invention includes an imaging unit that images a subject and outputs an image signal, a first image data generation unit that generates image data from an image signal output from the imaging unit, and the first A second image data generating unit configured to generate second image data corresponding to the image data, and the first and second image data generated according to an imaging operation of the imaging unit inside the housing The recording control means for recording on a mounted disk recording medium and an impact detection unit for detecting an impact received by the housing, wherein the recording control means is generated according to the imaging operation. And the second image data is controlled to be recorded from both ends of the disk recording medium, and an impact of a predetermined value or more is detected by a detection result of an impact detection unit that detects an impact received by the housing. Is characterized in that stops the recording of data to the disk recording medium.

  An imaging method according to the present invention includes an imaging step of imaging a subject and outputting an image signal, a first image data generation step of generating image data from the image signal output in the imaging step, and the first A second image data generating step for generating second image data corresponding to the image data, and the first and second image data generated in accordance with the imaging operation of the imaging means inside the housing A recording control step of recording on the mounted disc recording medium, and recording the first and second image data generated according to the imaging operation in the recording control step from both ends of the disc recording medium, respectively. In addition, when an impact of a predetermined value or more is detected based on an impact detection result for detecting an impact received by the casing, data recording on the disk recording medium is stopped. And controlling the.

  In the present invention, the first image data is generated from the image signal obtained by imaging the subject, the second image data corresponding to the first image data is generated, and the first and second image data are generated. When the image data is recorded on the disk recording medium mounted in the housing, the first and second image data are recorded from both ends of the disk recording medium. Can be used effectively at the time of data recording, and when the impact received by the housing is not less than a predetermined value, the disk recording can be performed. Since recording of data on the medium is stopped, erroneous recording due to impact can be prevented, and the data area of the disk recording medium can be used effectively.

  Embodiments of the present invention will be described in detail with reference to the drawings.

  The digital camera device 1 according to the embodiment of the present invention has a portable size with a generally rectangular parallelepiped outer shape as shown in FIG. In this digital camera device 1, a shutter button 3, an objective lens 4, and a flash 5 are respectively attached to the upper part on the front side of the housing 2, and the shutter button 3 can be pressed with the user's right hand index finger.

  In addition, the digital camera device 1 has an open / close lid 7 attached to one side surface 6 of the housing 2, and a 3.5-inch flexible magnetic disk 9 (hereinafter simply referred to as a magnetic disk 9) from the side surface 6 side. The flexible disk cartridge 8 accommodated in the inside of the housing 2 can be loaded inside the housing 2. Specifically, as shown in FIG. 2 showing the appearance of the digital camera device 1 from the back side, a flexible disk drive 32, which will be described in detail later, is disposed inside the housing 2, and this flexible disk A flexible disk cartridge 8 (hereinafter simply referred to as cartridge 8) is inserted from the cartridge insertion opening 32a of the drive 32 from the shutter 8a side.

  Further, the digital camera device 1 has an LCD (Liquid Crystal Display) panel 11 attached to the back side of the housing 2, and a subject is displayed on the LCD panel 11 at the time of photographing. In the digital camera device 1, when a subject is photographed by pressing the shutter button 3, image data about the subject (hereinafter referred to as main body image data) is recorded on the magnetic disk 9 in the cartridge 8 loaded in the flexible disk drive 32. .) And thumbnail image data serving as indexes for the main body image data are recorded in file formats having extensions of “.JPG” and “.411”, respectively.

  In addition, when reproducing the main body image data after photographing the subject, the digital camera device 1 displays only six thumbnail images of the thumbnail image data recorded on the magnetic disk 9 on the LCD panel 11, By designating the thumbnail image, main body image data corresponding to the thumbnail image is read from the magnetic disk 9 and displayed on the LCD panel 11.

  Furthermore, the digital camera device 1 erases unnecessary ones of main body image data and thumbnail image data recorded on the magnetic disk 9 or changes the arrangement of thumbnail images displayed on the LCD panel 11, for example. It can be edited.

  That is, in the digital camera device 1, various operation buttons / switches 12a, 12b, 12c, 12d, 12e, 12f, 12g, and the like are disposed around the LCD panel 11, and these various operation buttons are operated. Thus, operations such as zooming at the time of shooting, designation of a specific thumbnail image at the time of reproduction, and editing such as data erasure can be performed.

  The open / close lid 7 is opened / closed by moving the open / close operating portion 13 up and down to engage the engaging claws 14a, 14b interlocked with the open / close operating portion 13 and the engaging portions 7a, 7b of the open / close lid 7. Is performed by releasing or holding.

  Next, the circuit configuration of the digital camera device 1 will be described. As shown in FIG. 3, the digital camera device 1 includes a CCD 21 that is an image pickup device, a sample hold / analog digital conversion circuit 22 (hereinafter simply referred to as a sample hold circuit 22), a camera signal processing circuit 23, and a DRAM 24. A DRAM controller 25, a panel signal processing circuit 26 for supplying RGB signals to the LCD panel 11, an operation input unit 27, a microcomputer 28 (hereinafter referred to as a microcomputer 28), and a flexible disk controller ( FDC) 31 and the flexible disk drive (FDD) 32 described above with reference to FIG. The DRAM 24, the DRAM controller 25, the microcomputer 28, and the FDC 31 are connected to each other by a common bus.

  In the digital camera device 1, a light beam from a subject passes through the objective lens 4 and is received by the CCD 21, and is converted into an electric signal by the CCD 21. The output signal from the CCD 21 is sampled and held by the sample and hold circuit 22 and then A / D converted into a 10-bit digital signal. The 10-bit digital signal that has been A / D converted is supplied to the camera signal processing circuit 23.

  The camera signal processing circuit 23 performs predetermined processing on the 10-bit digital signal supplied from the sample hold circuit 22 and outputs the processed signal to the DRAM controller 25. In this embodiment, the camera signal processing circuit 23 generates an 8-bit luminance signal Y and a 4-bit color difference signal C from an input signal, and outputs these signals Y and C to the DRAM controller 25. .

  The DRAM controller 25 supplies the luminance signal Y and the color difference signal C from the camera signal processing circuit 23 to the panel signal processing circuit 26 as they are. If the CCD 21 is not a square lattice, the DRAM controller 25 converts the luminance signal Y and the color difference signal C from the camera signal processing circuit 23 into a square lattice and supplies it to the panel signal processing circuit 26. The panel signal processing circuit 26 generates a red signal R, a green signal G, and a blue signal B from the input luminance signal Y and color difference signal C, and outputs these RGB color signals to the LCD panel 11. As a result, an image of the subject to be imaged is displayed on the LCD panel 11.

  Further, the DRAM controller 25 stores the luminance signal Y and the color difference signal C from the camera signal processing circuit 23 in a predetermined area of the DRAM 24 under the control of the microcomputer 28 described later in detail. The DRAM 24 has a storage area of a total of 8 megabytes by using two 4 megabyte ones.

  The operation input unit 27 detects the operation contents of the shutter button 3 shown in FIG. 1 and various operation buttons / switches 12a to 12g shown in FIG. 2, and outputs the detected signals to the microcomputer 28 as operation signals.

  The microcomputer 28 is, for example, a RISC (Reduced Instruction Set Computer) type capable of high-speed processing, and includes a read-only memory (ROM) 28a in which a software program for controlling each block is stored. I have. The microcomputer 28 executes the software program in the ROM 28a based on the operation signal from the operation input unit 27, thereby performing the above-described processing such as image compression / decompression and file management at the time of shooting, reproduction, and editing. Do.

  Specifically, the microcomputer 28 stores the luminance signal Y and the color difference signal C in a predetermined area of the DRAM 24 from the DRAM controller 25 at the time of photographing the subject, and stores the stored luminance signal Y and the color difference signal C in JPEG (Joint Photographic coding). Data compression is performed using the ExpertsGroup method. Further, the microcomputer 28 performs processing for writing data on the main body image compressed by the JPEG method as JPEG stream data in an area different from the area of the DRAM 24. Further, the microcomputer 28 reads out the JPEG stream data from the DRAM 24 and uses the JPEG stream data in an MS-DOS (Microsoft Disc Operating System: Microsoft registered trademark) format format corresponding to a so-called PC / AT compatible personal computer. A process of converting the data into the FDC 31 and supplying it to the FDC 31 is performed. The microcomputer 28 controls the FDC 31 so that the data converted into the MS-DOS format is written to the magnetic disk 9 in the cartridge 8 loaded in the flexible disk drive 32.

  FIG. 4 is a diagram showing the address space of the microcomputer 28. As shown in FIG. 4, the microcomputer 28 has an area from 0000000 to 0ffffff as an internal ROM area, an area from 2000000 to 2ffffff as an area for the FDC 31, an area for peripheral modules having an area as 5000000 to 5ffffff, An area from 9000000 to 9ffffff is an area for the DRAM 24, an area from e000000 to effffff is an area for a flash memory to be described later, and an area from f000000 to fffffff is an area of the internal RAM.

  FIG. 5 is a diagram showing the data area of the DRAM 24 of a total of 8 megabytes described above. The DRAM 24 is an original image data storage area (hereinafter referred to as area A) for storing 491025 bytes of areas 9f00000 to 9f77fff for one main body image to be displayed on the LCD panel 11. In the DRAM 24, 32768 bytes of 9f78000 to 9f7ffff become a compression / decompression work area (hereinafter referred to as area B) for performing the compression process of the original image data or the expansion process to the original image data by the JPEG method. Yes. This area B is also an area for generating thumbnail data from the original image data.

  In the DRAM 24, 32768 bytes in the areas 9f80000 to 9f87fff are stored in a main routine common area (hereinafter referred to as area C), which is a work area for the microcomputer 28 to execute a main routine at the time of recording and reproduction, which will be described in detail later. It has become.

  In the DRAM 24, 32768 bytes in the areas 9f88000 to 9f8ffff are DOS areas for MS-DOS (hereinafter referred to as area D), and 262144 bytes in the areas 9f90000 to 9fcffff are a plurality (for example, 50) of thumbnail image data. A thumbnail image storage area (hereinafter referred to as an area E) in which a file of the main body image data generated by compressing 19608 bytes of the areas 9fd0000 to 9ffffff by the JPEG method is stored in a JPEG file image storage It is assigned to each area (hereinafter referred to as area F).

  Furthermore, in the digital camera device 1, as shown in FIG. 6, an acceleration sensor 33 for detecting an external impact, an amplification circuit 34 for amplifying an output signal of the acceleration sensor 33, and the amplification circuit 34 and a flip-flop 35 for fixing the output signal from 34. The acceleration sensor 33 outputs a detection signal when an impact greater than a predetermined G value is detected, and the details thereof will be described later.

  The output of the flip-flop 35 is supplied to the microcomputer 28 and to the flexible disk drive 32 via one input terminal of the AND circuit 36. On the other hand, the microcomputer 28 outputs a reset signal to the flip-flop 35.

  As shown in FIG. 6, the AND circuit 36 has the other input terminal connected to the output side of the control signal of the FDC 31 and the output terminal connected to the flexible disk drive 32, so that the recording of the flexible disk drive 32 is performed. It has a function as a gate (W. gate) that gives an instruction to permit / deny the operation. A detailed description of the acceleration sensor 33 and the like will be described later.

  Next, a control operation at the time of data recording in the digital camera device 1 will be described with reference to a flowchart of FIG.

  In step S1 after the power is turned on, the microcomputer 28 determines whether or not the cartridge 8 is loaded. If it is determined that the cartridge 8 is loaded, the microcomputer 28 proceeds to step S3, whereas if it is determined that the cartridge 8 is not loaded. Advances to step S2.

  In step S <b> 2, the microcomputer 28 displays a character “NO DISK” on the LCD panel 11 to warn the user and waits until the cartridge 8 is loaded.

  In step S3, the microcomputer 28 detects whether or not the cartridge 8 is write-protected in order to determine whether or not writing to the magnetic disk 9 is possible. If so, the process proceeds to step S4. If not, the process proceeds to step S5.

  In step S4, the microcomputer 28 issues a warning that writing cannot be performed, and ends the process. Specifically, characters such as “DISK PROTECT” are displayed on the LCD panel 11.

  In step S5, the microcomputer 28 controls the FDC 31 to reproduce the 00 track on the outermost periphery of the magnetic disk 9 by the flexible disk drive 32, and is described in the root directory area and FAT (File Allocation Table) area in this track. By reading the existing data, various information such as a file name and its address existing in the data area of the magnetic disk 9 are extracted.

  In step S6, the microcomputer 28 creates a file list table (FileList Table), lists various information extracted in step S5 in this table, and proceeds to step S7.

  In step S7, the microcomputer 28 checks whether or not the magnetic disk 9 is formatted in the DOS / V format. If YES, the microcomputer 28 proceeds to step S9. If NO, the microcomputer 28 proceeds to step S8.

  In step S <b> 8 when the magnetic disk 9 is not formatted in the DOS / V format, the microcomputer 28 displays the characters “DISK ERROR” on the LCD panel 11 and ends the process.

  In step S9, the microcomputer 28 stands by until a release is input. That is, the process waits in step S9 until the shutter button 3 shown in FIG. 1 is pressed, and proceeds to step S10 when the shutter button 3 is pressed.

  In step S10, the microcomputer 28 stores the image data obtained by shooting the subject in the area A shown in FIG.

  In the next step S <b> 11, the microcomputer 28 generates main body image data by performing processing for compressing the image data stored in the area A of the DRAM 24 in the area B by the JPEG method, and generates the main body image data in the area of the DRAM 24. Store in F in file format.

  In the subsequent step S12, the microcomputer 28 generates thumbnail image data that is a subsample of the main body image by thinning out the main body image data captured in step S10 to a predetermined data amount in units of pixels, and this thumbnail image data is stored in the DRAM 24. Are stored in the area B in the file format. In the digital camera device 1, the data is thinned out so that the thumbnail image file has a predetermined capacity.

  In the next step S13, the microcomputer 28 checks the remaining recording capacity of the magnetic disk 9 with reference to the file list table before recording each data. The microcomputer 28 compares the remaining recording capacity with the total capacity of the main body image data and the thumbnail image data stored in the areas F and E in steps S11 and S12, respectively. Judge whether the remaining amount is sufficient. If it is determined that the remaining amount is sufficient, the process proceeds to step S15. If it is determined that the remaining amount is insufficient, the process proceeds to step S14.

  In step S <b> 14, the microcomputer 28 displays a character such as “DISK FULL” on the LCD panel 11, issues a warning to the user, and ends the process.

  In step S15, the microcomputer 28 checks the number of files already recorded on the magnetic disk 9 with reference to the file list table, and determines whether or not the number of files is limited. Specifically, it is determined whether or not there is a restriction when adding the file names of the main image file and the thumbnail image file to the 00 track of the magnetic disk. If the number of files is limited, that is, if no more file names can be added, the process proceeds to step S16, and if not limited, the process proceeds to step S17.

  In step S <b> 16, the microcomputer 28 displays a character such as “DISK FULL” on the LCD panel 11 in the same manner as in step S <b> 14, issues a warning to the user, and ends the process. That is, in the above-described step S13 and step S15, it is determined whether or not the main body image file and the thumbnail image file can be recorded in the current state of the magnetic disk 9.

  In step S17, the microcomputer 28 creates a file name for each of the main body image file and the thumbnail image file. As shown in FIG. 8, this file name is the file name “MVS-001S.JPG” for the first main image file. On the other hand, the first thumbnail image file corresponding to the main body image file has a file name “MVS-001S.411”. That is, “JPG” and “411” are extensions of the main body image file and the thumbnail image file, respectively, and only the extension is different between the main body image file and the thumbnail image file, and other portions have the same file name. .

  Here, the “MVC-” portion is a so-called name fixing portion that is commonly assigned between each main body image file and each thumbnail image file. The part “001” is a serial number, and a different number is assigned to each main body image file and each thumbnail image file by referring to the above-described file list table. This serial number is from 001 to 999, and a new number is obtained by adding 1 to the maximum number on the disk. By referring to the file list table, when there is a main body image file or a thumbnail image file with a serial number of 999, an unused number from 001 is assigned.

  Furthermore, the part “S” is a part representing the degree of compression rate of the data of the main body image file, and in this case, the main body image file is a file composed of data subjected to standard compression. If the main body image file is a file composed of compressed data for high image quality, this portion is “F”.

  In the next step S <b> 18, the microcomputer 28 creates a main body image file allocation for recording the main body image file in a predetermined area of the magnetic disk 9. Specifically, by securing an area from the outer peripheral side of the magnetic disk 9, the area for recording the main body image file is determined and stored.

  In subsequent step S <b> 19, the microcomputer 28 controls the FDC 31 to perform processing for writing the main body image file to the area on the magnetic disk 9 determined in step S <b> 18 by the flexible disk drive 32.

  Further, in the next step S20, the microcomputer 28 creates a thumbnail image file allocation for recording the thumbnail image file in a predetermined area of the magnetic disk 9. Specifically, by securing an area from the inner circumference side of the magnetic disk 9, the area for recording the thumbnail image file is determined and stored.

  In step S21, the microcomputer 28 controls the FDC 31 to perform processing for writing the thumbnail image file in the area on the magnetic disk 9 determined in step S20 by the flexible disk drive 32.

  In the next step S22, the microcomputer 28 controls the FDC 31 so that the main body image recorded in the steps S19 and S21 in the root directory area and FAT (File Allocation Table) area in the above-described 00 track of the magnetic disk 9 is controlled. Information about the file name, recording time, file size, and the like for the file and thumbnail image file is written by the flexible disk drive 32. FIG. 9 shows this, and in this case, the main image file and the thumbnail image file have the same file name excluding the extension, and the final editing time (in this case, the recording time) matches. Become. In addition, the thumbnail image file always has a file size of 4806 bytes, and the file size of one main body image file varies depending on the complexity of the image, and thus becomes undefined.

  Further, in the next step S23, the microcomputer 28 changes the file list table by adding information about the two files to the file list table, and proceeds to step S24.

  In step S24, the microcomputer 28 transfers the thumbnail image file from the area B of the DRAM 24 to the area E. After the process of step S24 is completed, the microcomputer 28 returns to the release input waiting state of step S9, and repeats the processes from step S9 to step S24 based on the release input.

  Through the above processing, the main body image file and the thumbnail image file are recorded in the data area of the magnetic disk 9 from both ends of the disk, respectively, as shown in FIG. For convenience of explanation, the file names of the main body image file and the thumbnail image file are abbreviated as A.JPG, B.JPG,..., A.411, B.411,. FIG. 10A shows the case where four main body image files A.JPG, B.JPG, C.JPG, and D.JPG are recorded in this order, and thumbnail image files A.411 and B.411 corresponding thereto. , C.411, D.411 are recorded.

  That is, in the digital camera device 1, the main body image file is recorded and arranged in order from the beginning of the data area of the disc, and the thumbnail image file is arranged in order from the last side of the data area. The recording direction of each thumbnail image file, that is, the data writing direction is the same as the recording direction of the main body image file.

  Thus, when recording each data on the so-called empty magnetic disk 9, the main body image file and the thumbnail image file are recorded in a physically separated area of the magnetic disk 9, and Since thumbnail image data is continuously recorded from one end of the data area of the magnetic disk 9, it is possible to quickly read out a plurality of thumbnail image data as if it were a single file. The time required for reading is greatly reduced.

  Further, since only the thumbnail image data is recorded in a collective state, unnecessary data processing becomes unnecessary. Furthermore, since it is not necessary to have thumbnail information in the main body image file, there is no need to depend on the file format of the main body image file.

  On the other hand, in the digital camera device 1, since the main body image file is recorded from the position on the disk opposite to the thumbnail image file, as shown in FIG. The entire data area of the magnetic disk 9 can be used effectively during data recording.

  Since the magnetic disk 9 on which each data is recorded by the digital camera device 1 depends on the MS-DOS format, copying by the DISKCOPY command can be performed as usual.

  FIG. 10B shows a case where E.JPG which is the fifth main body image file and E.411 which is the thumbnail image file of this main body image file are additionally recorded from the state of FIG. Represents. In this case, for example, the fifth main body image file E.JPG is recorded discontinuously with D.JPG because there is some other data after the fourth main body image file D.JPG on the magnetic disk 9. Even in such a case, the fifth thumbnail image file E.411 is very likely to be recorded continuously in D.411. That is, since a flexible disk drive generally records files from the outer periphery of the disk, the inner periphery of the disk is often in a so-called untouched state.

  Further, since the capacity of the thumbnail image file is fixed, for example, even when the thumbnail image file C.411 is deleted by editing, the thumbnail image file to be recorded next is F.411. This can be recorded in the area where C.411 was recorded. In this digital camera device 1, when a specific thumbnail image file is deleted and a discontinuous area for the thumbnail image file is generated on the magnetic disk 9, the thumbnail image file is deleted at the next recording. A new thumbnail image file is recorded in the area. With such a recording method, the continuity of each thumbnail image file on the magnetic disk 9 can be maintained. A detailed description of such an example will be described later.

  Next, reading control of thumbnail image files during reproduction in the digital camera device 1 will be described with reference to the flowchart of FIG.

  In the digital camera device 1, after entering the thumbnail reading mode, a series of processing from step S31 to step S40 described below is executed.

  In step S31, the microcomputer 28 controls the FDC 31 to reproduce the 00 track on the outermost periphery of the magnetic disk 9 by the flexible disk drive 32, starts reading information about the thumbnail file, and proceeds to step S32.

  In step S32, the microcomputer 28 performs a process of extracting a file name of a valid thumbnail image file. Specifically, the correspondence between the thumbnail image file and the main body image file is checked with reference to the root directory area and the FAT area of the 00 track, and the thumbnail image file is determined depending on whether or not the corresponding main body image file exists. It is determined whether it is valid, and only the file name of a valid thumbnail image file is extracted. Further, when the correspondence between the thumbnail image file and the main body image file is examined, if there is no thumbnail image file corresponding to the predetermined main body image file, information such as the file name of the main body image file is stored.

  In the next step S33, the microcomputer 28 controls the FDC 31 to arrange the file names of the extracted effective thumbnail image files in the order of physical addresses of the magnetic disk 9.

  In the next step S34, the microcomputer 28 creates a thumbnail management table which will be described later in detail for associating the address of each thumbnail image file with the main body image file. If there is no thumbnail image file corresponding to the predetermined main body image file described in step S32, blank image data whose details will be described later are assigned to the predetermined main body image file when the thumbnail management table is created. To do.

  In the subsequent step S35, the microcomputer 28 controls the FDC 31, reads one thumbnail image file from the outer peripheral side of the magnetic disk 9 by the flexible disk drive 32, and stores it in the area E shown in FIG. The process proceeds to step S36.

  In step S36, the microcomputer 28 determines whether the process of step S35 has been completed normally, that is, whether one thumbnail image file has been read normally. If it is determined that the process has been completed normally, the process proceeds to step S38. If it is determined that the process has not been completed normally, the process proceeds to step S37.

  In step S37 when it is determined that the process of step S36 has not ended normally, the microcomputer 28 performs the process assuming that no thumbnail image file exists, and the process proceeds to step S38. Specifically, the thumbnail management table is changed to set a pointer to correspond to the blank image.

  In step S38, the microcomputer 28 determines whether the thumbnail image file has been read to the end. If YES, the microcomputer 28 proceeds to step S40 and ends the process. If NO, the microcomputer 28 proceeds to step S39.

  In step S39, the microcomputer 28 prepares for reading the next thumbnail image file, and returns to step S35 described above. Thereby, the microcomputer 28 repeats the processing from step S35 to step S39 until all valid thumbnail image files are read.

  Next, a case where data is erased from the magnetic disk will be described with reference to the drawings. Here, for convenience of explanation, the file names of the main body image file and the thumbnail image file are abbreviated as 001.JPG, 002.JPG,..., 001.411, 002.411,.

  FIG. 12 shows a history regarding data recording and deletion with respect to a certain magnetic disk. That is, the magnetic disk in this example (hereinafter, the magnetic disk in this example is referred to as the magnetic disk 9a) corresponds to this when recording the 005.JPG which is the fifth main body image file, as shown in FIG. The thumbnail image file 005.411 has not been recorded for some reason. The magnetic disk 9a records a main body image file 001.JPG to 009.JPG and a corresponding thumbnail image file (001.411 to 009.411 excluding 005.411), and then records the main body image file 003.JPG. The corresponding thumbnail image file 003.411 is deleted, and after this deletion, the main body image file 010.JPG and the corresponding thumbnail image file 010.411 are recorded.

  Hereinafter, the reproduction operation of the magnetic disk 9a will be described with reference to the flowchart of FIG.

  In step S31, the flexible disk drive 23 starts reproducing the 00 track of the magnetic disk 9a.

  In step S32, the file names of valid thumbnail image files are 001.411, 002.411, 004.411, 006.411, 007.411, 008.411, 009.411, 010, and 010. .411 are extracted. Since there is no thumbnail image file (005.411) corresponding to the main body image file 005.JPG, a pointer is set to the file name of the main body image file 005.JPG.

  In the next step S33, the file names of the extracted valid thumbnail image files are rearranged in the order of physical addresses of the magnetic disk 9. In this case, it is rearranged in the order of 009.411, 008.411, 007.411, 006.411, 004.411, 010.411, 002.411, and 001.411. That is, the thumbnail image file is recorded from the innermost circumference side of the magnetic disk 9a, and 010.411 is recorded after 003.JPG and 003.411 are deleted. Therefore, the thumbnail image file 010.411 is recorded. Is recorded in the area between 004.411 and 002.411.

  In step S34, for example, a thumbnail management table as shown in FIG. 13 is created. This thumbnail management table has a file number column, a main image file column, and a corresponding thumbnail address column. In this embodiment, the file number and main image file columns are recorded in the main image file. Arranged in order. In the corresponding thumbnail address column, the leading address in this area when stored in the area E of the DRAM 24 according to the rearrangement order performed in step S33 is described. For the main body image file 005.JPG having no corresponding thumbnail image file, for example, 0 is described as the start address of the area on the DRAM 24 in which the blank image data is stored.

  In the subsequent step S35, the thumbnail image file 09.411 located on the outer peripheral side of the magnetic disk 9a is read out, and as shown in FIG. 14, for example, in the area from address numbers a to b-1 in the area E of the DRAM 24. In step S26, it is determined that the thumbnail image file has been read normally. If the thumbnail image file 009.411 is not read normally in step S25, the corresponding thumbnail address field in the thumbnail management table is rewritten to 0 in step S27.

  In step S38, since all the thumbnail image files have not been read yet, the process proceeds to step S39, and the processing in steps S35 to S39 is repeated, so that the thumbnail image file is converted into a thumbnail image file as shown in FIG. They are stored in the area E of the DRAM 24 in the order of 008.411, 007.411, 006.411, 004.411, 010.411, 002.411, and 001.411.

  As described above, since the thumbnail image file 005.411 is not recorded on the magnetic disk 9, 006.411 is read into the DRAM 24 after 004.411. Further, since there is a main body image file in which no thumbnail image file exists on the magnetic disk 9a, a predetermined area (area 0 to a-1 in FIG. 14) of the DRAM 24 is displayed instead when there is no thumbnail file. To store the blank image data.

  After all the thumbnail image files on the magnetic disk 9a are stored in the DRAM 24, the microcomputer 28 controls the DRAM controller 25, the panel signal processing circuit 26, and the like so that six thumbnails are displayed on the LCD panel 11. . At this time, referring to the thumbnail management table, the thumbnails are displayed on the LCD panel 11 in the order of file numbers.

  As a result, as shown in FIG. 15, six thumbnails are displayed on the LCD panel 11. Since there is no corresponding thumbnail image file for 005.JPG, the file name of the main body image is displayed as the blank image in a gray image having the same size as that of other photographed images, for example. You can do it.

  In the digital camera device 1, based on the operation signal from the operation input unit 27, a main body image file corresponding to one thumbnail among the displayed six thumbnails is read from the magnetic disk 9 a. The main body image file is stored in the area F of the DRAM 24 and is displayed on the LCD panel 11 after being developed by the microcomputer 28 based on the JPEG method.

  Next, the internal mechanical configuration of the digital camera device 1 will be described. As shown in FIG. 16, the housing 2 of the digital camera device 1 can be disassembled into a front half 2a and a back half 2b, and a circuit board 41 is provided inside each half 2a, 2b. The chassis 42 and the flexible disk drive 32 described with reference to FIG. 3 are disposed. Specifically, the circuit board 41, the chassis 42, and the flexible disk drive 32 have substantially rectangular planar shapes that are substantially equal to each other, and are disposed inside the housing 2 so that the rectangular shapes overlap each other. The

  More specifically, as shown in FIG. 16, the circuit board 41 is fixed by a plurality of screws 43 to one main surface of which four corners face the front half 2 a of the chassis 42. The flexible disk drive 32 is attached to the other main surface facing the rear half 2b of the chassis 42 via four buffer members 45, 46, 47, and 48, the details of which will be described later. The chassis 42 to which the circuit board 41 and the flexible disk drive 32 are attached is fixed to the front half 2a of the housing 2 with screws 44 from the upper side, and also with screws from the side surface although not shown. It has a configuration.

  Here, the circuit board 41 has a substantially rectangular plate shape as a whole, and various chips such as LSIs which are blocks of the circuit shown in FIGS. 3 and 6 are attached to both main surfaces thereof. As shown in FIG. 16, the acceleration sensor 33 described above with reference to FIG. 6 having a substantially rectangular parallelepiped shape is attached to the main surface 41a facing the back half 2b of the circuit board 41. Specifically, as shown in FIG. 17, the acceleration sensor 33 has a long side of the substantially rectangular parallelepiped casing 61 on the slightly lower right side of the main surface 41 a of the circuit board 41, and a lower side portion 41 b of the circuit board 41. Are attached at an angle of approximately 45 degrees. Further details of the acceleration sensor 33 will be described later.

  The chassis 42 is formed of a metal such as stainless steel, and the main surface portion 42a is largely cut out. In the chassis 42, an upper flange 42b, a lower flange 42c, and a side flange 42d are formed in a direction facing the back half 2b from the upper edge side, the lower edge side, and the right edge side in FIG. 16, respectively. .

  The flexible disk drive 32 is a so-called 1/2 height thin type having a metal casing 32b. The flexible disk drive 32 is attached to the chassis 42 by screws through four buffer members 45, 46, 47, and 48. That is, the upper flange 42b and the lower flange 42c of the chassis 42 and the buffer members 45 to 48 are formed with holes for allowing the screws 49, 50, 51, and 52 to pass therethrough. The flexible disk drive 32 is fixed to the chassis 42 by passing through each hole and screwing into a screw hole formed at a corresponding position of the flexible disk drive 32.

  Here, as shown in FIG. 18 in which the circuit board 41 and the flexible disk drive 32 are attached to the chassis 42 from the cartridge insertion opening 32a side, the casing 32b of the flexible disk drive 32 and the main surface 42a of the chassis 42 are shown. Are not in direct contact with each other, and vibrations and impacts applied to the chassis 42 are transmitted to the flexible disk drive 32 via the buffer members 45 to 48. On the other hand, in the relationship between the chassis 42 and the circuit board 41, the four corners of the circuit board 41 are fixed to the main surface part 42a of the chassis 42 with the screws 43 as described above. The shock is transmitted to the circuit board 41 as it is.

  Each of the buffer members 45 to 48 is for delaying the time until an impact applied to the housing 2 from the outside is transmitted to the flexible disk drive 32. For example, the buffer members 45 to 48 are made of a soft material such as rubber, sponge, silicon, or soft plastic. Molded by a member. Each of the buffer members 45 to 48 also has a function of weakening the impact applied to the housing 2 to some extent and transmitting it to the flexible disk drive 32.

  In this embodiment, the flexible disk drive 32 and the housing 2 are connected via the chassis 42. However, the flexible disk drive 32 and the housing 2 are connected without using the chassis 42. It is good. In this case, a hole for penetrating the screws 49 to 52 is formed on the housing 2 side, and the screws 49 to 52 are inserted into the holes so that the flexible disk drive 32 is attached to the housing 2. It is only necessary to attach them through the buffer members 45 to 48.

  The acceleration sensor 33 is provided with an impact detection plate 62 for detecting an impact inside the casing 61, as shown in FIG. The impact detection plate 62 is a substantially rectangular plate-like member as a whole. Specifically, as shown in FIG. 20, for example, by two piezoelectric ceramic plates 62a and 62b provided with electrodes at the center of both main surfaces. It is formed in a thin beam shape. The impact detection plate 62 is configured such that both ends in the longitudinal direction are fixed within the casing 61 and the center of the main surface can move within the casing 61. Thereby, in the acceleration sensor 33, when an impact in the surface direction of the impact detection plate 62 is applied, the impact detection plate 62 is bent in an arc shape, and a signal proportional to the strength of the impact is obtained.

  As shown in FIG. 19, the impact detection plate 62 has a long side parallel to the long side of the housing 61 and an angle of 45 degrees with respect to the bottom surface 63 of the housing 61. It is arrange | positioned inside the housing | casing 61 so that it may become. The bottom surface 63 becomes a mounting surface to the circuit board 41.

  Therefore, as shown in FIG. 17, the acceleration sensor 33 is attached so that the long side of the casing 61 is at an angle of 45 degrees with respect to the lower side portion 41b of the main surface 41a of the circuit board 41. Impact from the direction can be detected. It has been confirmed through experiments that the acceleration sensor 33 is attached at this angle, whereby the degree of signal detection with respect to impact from each direction can be made uniform. That is, in the digital camera device 1, when the housing 2 is used in the basic posture as shown in FIGS. 1 and 2, the principal surface of the impact detection plate 62 of the acceleration sensor 33 is X, Y, Since the acceleration sensor 33 is arranged so as to form an angle of about 45 degrees with respect to the three Z directions, the impact from the X, Y, and Z directions can be detected evenly. As a result, it was confirmed that one accelerometer fulfills sufficient functions.

  FIG. 21 is a diagram showing a mechanism around the magnetic head disposed in the housing 32 b of the flexible disk drive 32. A head actuator 70 is disposed in the housing 32b of the flexible disk drive 32 as shown in FIG. The head actuator 70 includes a head arm 73 integrally formed by a pair of upper and lower arm members 71 and 72, and a pair of upper and lower magnetic heads 74 (74a and 74b) attached to the distal ends of the arm members 71 and 72. , A feed motor 75 for moving the head arm 73, a feed screw 76 attached to a rotor of the feed motor 75, and an arm member so as to engage with a spiral groove 76 a formed in the feed screw 76. A pin 77 attached to the base end side of 73 and a guide shaft 79 attached to the through hole 78 of the arm member 72 to guide the movement of the head arm 73 are configured.

  Each of the arm members 71 and 72 is formed of, for example, a synthetic resin, and a pair of upper and lower magnetic heads 74 attached to the front end side sandwich both main surfaces of the magnetic disk 9 as shown in FIG. Be positioned. Although not shown, a spindle motor for rotationally driving the magnetic disk 9 is disposed below the center of the main surface of the magnetic disk 9.

  The head actuator 70 having such a configuration slides the magnetic head 74 against the main surface of the magnetic disk 9 rotated by the spindle motor, and applies a magnetic field to the recording track of the magnetic disk 9 or records on the magnetic disk. By detecting the magnetic signal recorded on the track, the image data of the main body or thumbnail is recorded or reproduced.

  In the head actuator 70, the head arm 73 reciprocates along the guide shaft 79 in the radial direction of the magnetic disk 9 (the arrow direction in FIGS. 21A and 21B). Specifically, when the feed motor 75 rotates by a predetermined rotation angle, the head arm 73 moves one track at a time on each recording track formed on the magnetic disk 9. Here, when a strong impact is applied to the entire flexible disk drive 32, the housing 32b and the head arm 73 bend, thereby causing the positional deviation or contact failure of the magnetic heads 74a and 74b with respect to the recording track of the magnetic disk 9. As a result, the adjacent track is eroded during data recording, and writing to the current track is caused.

  In the case of such a 3.5 inch 1/2 height flexible disk drive, the G value causing a write error to the current track is 3G to 12G, and the G value causing erosion to the adjacent track is 50G. This was proved by experiments. Accordingly, the set value for the impact detection of the acceleration sensor 33 is set to an appropriate value including 3 to 12G to prevent the occurrence of an error in the current track to about 50G or less in order to prevent erosion to adjacent tracks. It is reasonable to define. In this digital camera device 1, it was confirmed by experiments that the best result was obtained when the set value for the impact detection of the acceleration sensor 33 was set to 7G to 8G, particularly around 8G.

  Hereinafter, operations of the acceleration sensor 33 and the flexible disk drive 32 when an impact is applied to the housing 2 of the digital camera device 1 from the outside will be described with reference to FIG.

  In the digital camera device 1, prior to recording each data, the microcomputer 28 shown in FIG. 6 determines a track number (here, n tracks) and a sector number on the magnetic disk 9 to be recorded, and then the FDC 31 is set. By performing the control, a seek operation for moving the magnetic head 74 of the flexible disk drive 32 to the position of the track and sector is performed.

  At time t0 after completion of the seek operation, a reset signal is output from the microcomputer 28 to the flip-flop 35, the output from the flip-flop 35 is reset, and a control signal from the FDC 31 is output. When the output signal of the AND circuit 36 is inverted, the gate is opened and data recording in the flexible disk drive 32 is permitted.

  Subsequently, the recording data is supplied from the FDC 31 to the flexible disk drive 32, whereby a recording current is supplied to the magnetic head 74, whereby the recording data is written to a predetermined sector of n tracks from time t1. The time from time t0 to time t1 is a rise time until the flexible drive 32 operates.

  For example, when an impact of 8G or more occurs at time t2, the impact is transmitted from the casing 2 to the chassis 42, the circuit board 41, and the acceleration sensor 33 in this order, and an impact detection signal is output from the acceleration sensor 33. Is done. The detection signal from the acceleration sensor 33 is amplified by the amplifier circuit 34 and then supplied to the flip-flop 35, thereby inverting the output of the flip-flop 35. The inverted output signal of the flip-flop 35 is supplied to the microcomputer 28 and the AND circuit 36. As a result, the output signal of the AND circuit 36 is inverted, and the gate of the control signal from the FDC 31 for the flexible disk drive 32 is closed. Accordingly, as shown in FIG. 22, no recording current is supplied to the magnetic head 74 of the flexible disk drive 32 from time t2.

  In this embodiment, since the chassis 42 and the flexible disk drive 32 are connected via the shock-absorbing members 45 to 48 for delaying the transmission of the impact as described above, the impact is determined by the acceleration sensor. It is transmitted to the flexible disk drive 32 at a time later than the time 33, in this example, a predetermined time after the time t2. At such a time, since no recording current is supplied to the magnetic head 74 of the flexible disk drive 32, this causes erosion to the adjacent track or the current track even if the magnetic head 74 has a track shift due to an impact. Occurrence of writing failure can be prevented.

  That is, in this embodiment, since the time at which the impact applied to the housing 2 is transmitted to the flexible disk drive 32 can be delayed, the impact detection of the acceleration sensor 33 can be relatively accelerated, and the recording current can be cut. The necessary time delay can be covered. In particular, when the rigidity of the housing 2 or the chassis 42 is high, the speed at which the impact is transmitted to the magnetic head 74 of the flexible disk drive 32 becomes very fast, and if the recording current is cut after detection by the acceleration sensor 33, it will not be in time. Cases can happen. In such a case, as shown in FIGS. 16 and 18, it is very effective to connect the flexible disk drive 32 and the housing 2 via the buffer members 45 to 48, and delay the impact transmission time. Thus, the function of the acceleration sensor 33 works effectively.

  As a result of the experiment, it was confirmed that in this embodiment, the time until the impact applied to the housing 2 is transmitted to the flexible disk drive 32 is 11 milliseconds ± 5 milliseconds.

  When the microcomputer 28 inputs the output signal inverted from the flip-flop 35 due to the occurrence of the impact at time t2, the microcomputer 28 outputs a control signal to the FDC 31, thereby moving the magnetic head 74 to the original position of the n track. I do.

  The microcomputer 28 outputs a reset signal to the flip-flop 35 at time t3 after the completion of this re-seek. As a result, the output signal of the flip-flop 35 is inverted at time t4 when the reset signal falls, and the inverted output signal is supplied to the microcomputer 28 and the AND circuit 36. Then, by supplying the inverted output signal to the AND circuit 36, the output signal of the AND circuit 36 is inverted and the gate is opened at this time t4, and data recording in the flexible disk drive 32 is permitted.

  Subsequently, the microcomputer 28 controls the FDC 31 to supply the recording data from the FDC 31 to the flexible disk drive 32 using the recording data from the recording start time t 1 as the retry target data. As a result, as shown in FIG. 22, the recording current for the retry target data is supplied to the magnetic head 74 of the flexible disk drive 32 from time t5, and the recording data is written from a predetermined sector of n tracks. The time from time t4 to time t5 is similarly a rise time until the flexible disk drive 32 operates.

  The digital camera device 1 may have a configuration having a flash memory 29 as shown in FIG. In the embodiment in FIG. 23, the DRAM 24, the DRAM controller 25, the microcomputer 28, the flash memory 29, and the FDC 31 are connected to each other by a common bus. With such a configuration, in the digital camera device 1, for example, in order to upgrade the function of the digital camera device 1, the upgrade program can be stored in the flash memory 29. Specifically, a cartridge 8 on which a program for compressing image data by a method other than the above JPEG is recorded is loaded in the flexible disk drive 32, and the program is read from the magnetic disk 9 in the cartridge into the flash memory 29. Thus, the function can be expanded.

  That is, in the digital camera device 1, since each block is controlled by a software program stored in the RAM 28a of the microcomputer 28, various software programs for version upgrade are stored in the flash memory 29. Thus, instead of the microcomputer 28 or the microcomputer 28 may be assisted.

It is an external appearance perspective view from the front side of the digital camera device to which the present invention is applied. It is an external appearance perspective view from the back side of a digital camera device. It is the block diagram which showed the circuit structure of the digital camera apparatus. It is a figure showing the address space of a microcomputer. It is a figure showing the data area of DRAM. It is the block diagram which showed the circuit structure of the digital camera apparatus. It is a flowchart for demonstrating the control action at the time of the data recording in a digital camera apparatus. It is a figure showing the file name of the main body image file. It is a figure showing the information about the file name, recording time, file size, etc. about a main body image file and a thumbnail image file. It is a figure for demonstrating the state of the main body image file and thumbnail image file which were recorded on the magnetic disc. 10 is a flowchart for explaining thumbnail image file read control during reproduction in the digital camera device. It is a figure showing the history about the recording state of a magnetic disk. It is a figure showing the thumbnail management table. It is a figure showing the state by which the thumbnail image file was stored in the predetermined area | region on DRAM from a magnetic disc. It is a figure showing the state by which the thumbnail etc. were displayed on the LCD panel. It is a disassembled perspective view for demonstrating the mechanical structure of a digital camera apparatus. It is a figure showing the attachment angle on the circuit board of an acceleration sensor. It is the figure which represented the attachment state of the circuit board and flexible disk drive with respect to a chassis from the cartridge insertion opening part side. It is a perspective view for demonstrating the structure of an acceleration sensor. It is a figure for demonstrating operation | movement of the acceleration sensor when an impact is added. It is a figure showing the mechanism about the magnetic head arrange | positioned inside the housing | casing of a flexible disk drive. It is a timing chart for demonstrating operation | movement of the acceleration sensor, flip-flop, OR circuit, microcomputer, flexible disk drive, etc. at the time of impact occurrence, and processing of recorded data. It is a block circuit diagram showing other embodiment in a digital camera apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Digital camera apparatus, 2 Case, 8 Cartridge, 9 Magnetic disk, 11 LCD panel, 24 DRAM, 25 DRAM controller, 28 Microcomputer, 29 Flash memory, 31 Flexible disk controller, 32 Flexible disk drive, 33 Accelerometer, 34 Amplification Circuit, 35 flip-flop, 36 OR circuit, 41 circuit board, 42 chassis, 45-48 buffer member, 61 housing, 62 impact detection plate, 70 head actuator, 73 head arm, 74 magnetic head

Claims (7)

Imaging means for imaging a subject and outputting an image signal;
First image data generation means for generating image data from an image signal output from the imaging means;
Second image data generation means for generating second image data corresponding to the first image data;
Recording control means for recording the first and second image data generated in accordance with the imaging operation of the imaging means on a disk recording medium mounted in a housing;
An impact detector for detecting an impact received by the housing;
The recording control means controls to record the first and second image data generated according to the imaging operation from both ends of the disk recording medium, and detects an impact received by the casing. An image pickup apparatus that stops recording data on the disk recording medium when an impact of a predetermined value or more is detected based on a detection result of the impact detecting unit.   The imaging apparatus according to claim 1, wherein the first image data is a main body image file, and the second image data is a thumbnail image file.   The recording control means controls to record the first image data in order from the head side of the data area of the disk recording medium and to record the second image data in order from the last side of the data area. The imaging apparatus according to claim 1. The first image data is a main body image file, and the second image data is a thumbnail image file,
The recording control means controls to record the first image data in order from the head side of the data area of the disk recording medium and to record the second image data in order from the last side of the data area. The imaging apparatus according to claim 1.   The imaging apparatus according to claim 1, further comprising management data generation means for generating management data for managing the first and second image data in association with each other. The first and second image data are files;
2. The imaging apparatus according to claim 1, wherein file names of the first image data and the second image data corresponding thereto are the same and have different extensions. An imaging step of imaging a subject and outputting an image signal;
A first image data generation step for generating image data from the image signal output in the imaging step;
A second image data generation step of generating second image data corresponding to the first image data;
A recording control step of recording the first and second image data generated in accordance with an imaging operation of the imaging means on a disk recording medium mounted in a housing;
An impact for controlling the recording of the first and second image data generated in accordance with the imaging operation in the recording control step from both ends of the disc recording medium, and detecting the impact received by the housing An imaging method comprising: controlling to stop recording data on the disk recording medium when an impact of a predetermined value or more is detected based on a detection result.

Images