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WO1998011719A1 - Dispositif de prise d'image - Google Patents

Dispositif de prise d'image Download PDF

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Publication number
WO1998011719A1
WO1998011719A1 PCT/JP1996/002626 JP9602626W WO9811719A1 WO 1998011719 A1 WO1998011719 A1 WO 1998011719A1 JP 9602626 W JP9602626 W JP 9602626W WO 9811719 A1 WO9811719 A1 WO 9811719A1
Authority
WO
WIPO (PCT)
Prior art keywords
image signal
digital image
signal
converting
processing
Prior art date
Application number
PCT/JP1996/002626
Other languages
English (en)
Japanese (ja)
Inventor
Ryuji Nishimura
Yasushi Takagi
Akihito Nishizawa
Toshiro Kinugasa
Original Assignee
Hitachi, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi, Ltd. filed Critical Hitachi, Ltd.
Priority to PCT/JP1996/002626 priority Critical patent/WO1998011719A1/fr
Publication of WO1998011719A1 publication Critical patent/WO1998011719A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/21—Intermediate information storage
    • H04N1/2104—Intermediate information storage for one or a few pictures
    • H04N1/2112—Intermediate information storage for one or a few pictures using still video cameras
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2101/00—Still video cameras

Definitions

  • the present invention relates to an imaging device, and more particularly to an imaging device i of all-soft processing suitable for still image capturing.
  • a conventional imaging apparatus photoelectric conversion is performed by using an imaging element such as a CCD (Charge Coupled Device), and digital processing is performed on the image to obtain a predetermined digital image signal.
  • an imaging element such as a CCD (Charge Coupled Device)
  • the analog output signal output from the CCD is converted into a digital signal by AZD conversion, and then a digital image signal is generated using a dedicated LSI or the like that performs predetermined signal processing.
  • Such an imaging device is provided with hardware for performing a predetermined operation necessary for generating a digital image signal, and has a feature that high-speed processing can be performed.
  • Such an apparatus is described in, for example, Japanese Patent Application Laid-Open No. 2-280496.
  • an LSI for performing signal processing of such an imaging device and an image quality control thereof are described in, for example, pages 391 and 362 of the 1991 Annual Conference of the Institute of Television Engineers of Japan. ing. Such an LSI not only performs signal processing for generating a video signal from the signal output by the CCD, but also generates a CCD drive pulse for controlling the exposure time of the image sensor and reading of the signal. I have.
  • This LSI is mainly for capturing moving images. Meanwhile, devices for capturing still images have also been developed. It is described in the 1995 Photographic Society of Japan, Fine Image Symposium, Final Report, pp. 59-62.
  • An object of the present invention is to increase the degree of freedom of the ⁇ signal processing in an imaging device. Another object of the present invention is to increase the degree of freedom in signal processing, to enhance the functions of the imaging device without extra components, and to enhance the operability thereof.
  • the camera signal processing and the image compression processing in the imaging device are all performed by software.
  • the image pickup apparatus of the present invention converts the optical signal formed by the optical system into an analog image signal and outputs the converted image signal, and converts the analog surface image signal output from the photoelectric converter into a first image signal.
  • a second type that holds a D-converting means for converting the image signal into a digital image signal and outputting the digital image signal, and a program representing an arithmetic procedure for performing a camera process for converting the image signal into a predetermined output format and an image compression process.
  • the first digital image signal output from the AZD conversion means and the first digital image signal output from the AZD conversion means are subjected to an operation for performing camera processing and image compression processing to generate a second digital image signal.
  • the second digital image signal is output to the outside, and the first digital image signal is subjected to an operation based on a program stored in the second memory means.
  • Digital image signal Controlling the arithmetic means to generate And control means for controlling the interface means so as to output the second digital image signal to the outside.
  • the content of the signal processing is stored as a program in the second memory means, thereby making the signal processing into software.
  • control means of the imaging apparatus of the present invention performs an operation based on the program held in the second memory means at least 600,000 times per second on the first digital image signal, and outputs the second digital image signal. Control the way you perform.
  • control stage for signal processing has the minimum necessary processing capability, the total processing time required for signal processing can be reduced to within one second.
  • the imaging device of the present invention operates the control means at a predetermined timing, and includes an oscillation circuit for generating a reference clock for operating the photoelectric conversion means and the A / D conversion means in synchronization with the timing. Further prepare.
  • the image pickup apparatus of the present invention includes a character mode input means for changing a process until conversion to a predetermined output format and switching to a character mode for photographing a black and white image at a high resolution. .
  • the second digital image signal is set so that there is no variation in the signal amount of the R, G, and B signals, or only the Y signal.
  • the above processing is easily performed by the software-based processing.
  • the imaging apparatus of the present invention changes the process of converting to a predetermined output format, and switches to a special effect mode for switching to a special effect mode for photographing while emphasizing an arbitrary area in the screen.
  • a password input means When the special effect mode is input, control is performed so that the fill characteristics change according to an arbitrary area in the screen.
  • the above processing is also easily performed by software processing.
  • the imaging apparatus of the present invention is provided with a setting change terminal for changing a process until conversion into a predetermined output match by an input from an external device to switch a shooting mode.
  • the parameters of the photographing mode stored in the rewritable memory means are rewritten.
  • the imaging apparatus K of the present invention includes a setting change terminal for changing a process until conversion into a predetermined output format by an input from an external device and setting a new shooting mode.
  • the imaging apparatus of the present invention includes a setting change terminal for performing version up of camera processing or image compression processing by input from an external device.
  • an integrated circuit which is constituted solely by the arithmetic means, the control means, and the second memory means of the imaging apparatus of the present invention is removable.
  • the version of camera processing or image compression processing can be improved by replacing it with another integrated circuit that has improved performance.
  • FIG. 1 is a block diagram showing a first embodiment of the imaging device of the present invention.
  • FIG. 2 is a diagram showing a color filter array in the imaging device of the present invention.
  • FIG. 3 is a block diagram illustrating a configuration of a ghost image control path in the first embodiment of the imaging device of the present invention.
  • FIG. 4 is a diagram illustrating operations and operations performed when capturing a still image in the imaging device of the present invention.
  • FIG. 5 is a diagram illustrating a flow of signal processing
  • FIG. 5 is a diagram illustrating a flow of generating a luminance and color difference signal in the imaging device of the present invention
  • FIG. 6 is a second diagram of the imaging device of the present invention.
  • FIG. 1 is a block diagram showing a first embodiment of the imaging device of the present invention.
  • FIG. 2 is a diagram showing a color filter array in the imaging device of the present invention.
  • FIG. 3 is a block diagram illustrating a configuration of a ghost image control path in the first
  • FIG. 7 is a block diagram of an imaging apparatus according to a third embodiment of the present invention.
  • FIG. 8 is a block diagram of an imaging apparatus according to a third embodiment of the present invention.
  • FIG. 9 is a block diagram illustrating a configuration of a CCD control circuit according to the present embodiment.
  • FIG. 9 is a block diagram illustrating an imaging apparatus according to a fourth embodiment of the imaging device K of the present invention.
  • FIG. 11 is a block diagram of an imaging device showing a fifth or sixth embodiment of the imaging device of the present invention, and FIG. Fig. 2 (a) shows the characteristics of the optical aperture one-pass filter when the CCD color filter array of the image pickup device shown in Fig. 2 is shown in Fig. 2 (a).
  • FIG. 13 is a diagram showing images before and after applying the effect, and FIG. 13 is a diagram showing an appearance of the imaging device of the present invention.
  • FIG. 1 is a block diagram showing a configuration of an imaging device according to the present invention.
  • 1 is a lens
  • 2 is a CCD
  • 3 is an amplification circuit
  • 4 is an AZD conversion circuit.
  • Reference numeral 5 denotes a buffer memory for writing the first digital image signal output from the AZD conversion circuit 4.
  • Reference numeral 6 denotes an image control circuit that performs signal processing, image input / output control, and the like, and 8 denotes an image memory that holds generated image signals.
  • Reference numeral 9 denotes an interface circuit that communicates with an external computer or the like and outputs a second digital image signal generated by the imaging apparatus of the present invention. 10 denotes a generated second digital image signal.
  • the light incident on the lens 1 forms an image on the imaging surface of the CCD 2.
  • the CCD 2 has a large number of pixels on its imaging surface, performs photoelectric conversion in each element, generates a pixel signal, and sequentially outputs the pixel signal.
  • color filters with a fixed pattern are arranged.Each * ⁇ ⁇ indicates a specific color filter It is configured to photoelectrically convert only color light.
  • Figure 2 shows such a color filter array pattern. In this embodiment, a filter that transmits three primary colors R (red), G (green), and B (blue) as shown in FIGS. 2A and 2B is used. Outputs analog image signals including three types of discrete pixel signals B.
  • a color filter array mainly composed of complementary colors having high light utilization may be used.
  • the amplifying circuit 3 amplifies the above-mentioned image signal and outputs it.
  • well-known noise reduction processing such as CDS (Correlated Double Sampling) may be performed.
  • the AZD conversion circuit 4 converts the analog image signal into a first digital image signal.
  • the first digital image signal is written into the buffer memory 5, and the written first digital image signal is subjected to signal processing by the image control circuit 6, and the second digital image signal is processed in the second format in accordance with a predetermined format. Is generated.
  • the buffer memory 5 normally holds the input image signal for one screen (one frame), an image corresponding to one part of the screen (for example, several lines) according to the processing capability of the image control circuit 6 Reading and writing may be repeated sequentially while holding the signal, or a memory of a capacity that can hold image signals for several screens may be used, and the still image You may comprise so that continuous photography is possible.
  • FIG. 3 is a block diagram showing the configuration of the image control circuit 6.
  • 30 is a CPU (Central Processing Unit)
  • 31 is an arithmetic circuit
  • 32 is a RAM (Random Access Memory)
  • 33 is R. 0 M (Read Only Memory)
  • 34 is the I / 0 port.
  • the rain image control circuit 6 includes the above components, but may be configured using a general-purpose microcomputer DSP (Digital Signal Processor) integrating these components or a dedicated LSI.
  • DSP Digital Signal Processor
  • Still image capturing is started when the user presses the operation switch 11 of the image capturing apparatus.
  • the operation switch in the imaging apparatus of the present invention can realize two different switch states, that is, a half-depressed state and a fully-depressed state.Firstly, when the operation switch is kept in a half-depressed state, Here, exposure control and white balance control are performed. Also, when there is an autofocus mechanism, the autofocus control is performed here. When these controls are completed, the user is notified of the completion of the preparation for shooting by display or sound. Here, when the user pushes the operation switch completely, a still image is captured.
  • FIG. 4 is a diagram showing a flow of an operation when capturing a still image and a signal processing performed by the image control circuit 6.
  • S1 of FIG. 4 it is detected that the switch is half-pressed. If the switch is half-pressed, the process proceeds to the next step S2, where the driving of the CCD is started, and the photoelectrically converted key in the CCD is started.
  • the analog image signal is stored.
  • S3 the stored analog image signal is read from the CCD.
  • the analog image signal read from the CCD is converted to a digital image signal via the amplifier circuit 3 and the A / D converter circuit 4 separately from the signal processing flow.
  • image control is performed on the written digital image signal. Circuit 6 controls exposure.
  • Exposure control is a process for controlling the exposure time of the CCD (the shutter speed of the electronic shutter) to an appropriate value. For this reason, the signal levels of the two image signals are compared with a predetermined reference value, and the shutter speed in reading the next analog image signal from the CCD is set so that the signal level approaches an appropriate value. In S5, if the signal level is an appropriate value, it is determined that the exposure control has been completed, and the process proceeds to the next process. If the exposure control has not been completed, the process returns to S3. This feedback control is performed until the exposure control is completed.
  • the generated signals, U, and V are read from the image memory 8, and both stationary image compression is performed based on a method such as JPEG (Joint Photographic Expert Group).
  • the compressed image signal is written into the image memory 8 again.
  • the image signal thus generated is recorded on the recording medium 10.
  • the image signals to be recorded are usually still images, but moving images (continuous still images) may be recorded. While the recording medium 1 0 using a semiconductor memory such as a hula Tsu Shumemori, other good c these recording media even with hard Dodi disk Ya magnetic tape, but can generally be interchangeable child removed is,
  • the imaging device K [fil-defined one may be used.
  • a recording medium, such as a memory card, from which data in the memory can be read by an external device such as a personal computer may be used.
  • the primary color filters R, G, and B are provided for each pixel, so that if the pixel signals are filtered, the signals R, G, and B can be generated. Filtering is performed by multiplying adjacent signals of the same type by appropriate coefficients and adding them.
  • the luminance signal Y may be obtained by multiplying the pixel signals R, G, and B of several adjacent pixels by an appropriate coefficient and adding them.
  • the signals R, G, and B can be obtained, for example, as follows.
  • the signals R, G, and B can be obtained even when the complementary color filter is used.
  • S111 the generated signals R, G, and B are multiplied by the gain obtained in S7 in FIG. 4 to perform white balance correction.
  • the processing of S110 and S111 may not be performed individually but may be performed simultaneously.
  • gamma correction is performed on the white balance corrected signals R, G, B and the signal Y.
  • the gamma correction is performed according to a table representing input / output characteristics based on the gamma characteristics.
  • the gamma correction is described in p. 362 of the Proceedings of the 1971 Annual Meeting of the Television Society of Japan, and is the same in principle.
  • color signals U and V are generated.
  • the signals U and V are calculated by multiplying the luminance signal Y generated by the following equation (7) and the color difference signals R-Y and ⁇ - ⁇ obtained by calculating the signals R, G and B by a predetermined coefficient. Can be generated.
  • the signals Y, U, and V can be obtained. like this Such processing is performed by the image control circuit shown in FIG. FIG. 3 is the same as the configuration of a general microcomputer, and the above processing is performed according to the program written in R0M33.
  • the image control circuit performs the camera processing and image compression processing until the CCD output signal is converted into a predetermined output format, that is, the above-described Y, U, and V signals.
  • the total processing time required for performing both processes is preferably less than 1 second, considering continuous shooting in the same scene. If the processing time is longer than this, the shutter chance may be missed, so that the usability is deteriorated. In order to perform high-speed camera signal processing within one second, it is necessary for the CPU that performs signal processing to have a certain processing capability.
  • the amount of operation necessary for performing the two-image compression process in the above camera signal processing is considered. Assuming that the number of pixels to be encoded is 3.8 million pixels per second, it is stated in 48, No. 1, PP 31-37 (1994) in the Journal of the Institute of Television Engineers of Japan. Approximately 130 for discrete cosine transform and approximately 50 MOPS (Mega Operation Per Second) for variable-length coding, and the compression of still images when other processing is included. Processing requires more than 200 MOPS. In the present invention, considering that a still image having a size of 640 ⁇ 480 pixels generally handled on a personal computer is generated in one second, the sampling format of the Y, U, and V signals is considered.
  • the amount of computation required to perform the plane image compression process is 200 MOPS or more when the number of pixels to be encoded is 3.8 million pixels per second based on the above. When the number is 600,000 pixels per second, it is about 30 MOPS or more.
  • the amount of computation required to perform camera signal processing other than image compression processing I can. This is mainly a matrix operation such as filtering, and if the filter processing is performed with a filter size of 5 x 5 pixels, the filter processing includes 25 multiply-accumulate operations . Even if one operation is one processing, the amount of operation differs depending on the processing content, so the same amount of operation as image compression processing is required, and as a result, it is necessary to perform camera signal processing other than image compression processing The computational complexity is about 30 MOPS.
  • the signal processing of still ft ' is performed by the image control circuit 6, and this signal processing is software processing in which the processing content is described by a program. Therefore, by changing the software, the content of the signal processing can be changed without changing the configuration of the imaging device, and an imaging device with a high degree of freedom in processing can be provided. Therefore, image quality and functions can be improved without increasing the circuit scale. In particular, image quality and functions can be set by input from external devices, so it is convenient to use. These will be described later.
  • FIG. 6 is a block diagram showing the configuration of the imaging device according to the present invention.
  • 40 is an oscillation circuit
  • 41 is a frequency dividing circuit.
  • Other parts are the same as those shown in the first embodiment.
  • the clock for CCD driving and the basic clock frequency of the image control circuit 6 may be different, but in this embodiment, the clock generated by the oscillation circuit 40 for the image control circuit 6 is used.
  • the clock divided by the frequency dividing circuit 41 is input to the CCD driving circuit 7 and the AZD converting circuit 4, and is configured to operate in synchronization with the image control circuit 6.
  • the signal from the CCD Signal processing in synchronization with the readout of the signal, the operation timing control when the image signal output from the CCD is taken into the image control circuit can be simplified, and the buffer memory 5 shown in the first embodiment can be used. Without using it, the image signal after AZD conversion can be taken directly into the image memory.
  • FIG. 7 is a block diagram showing the configuration of the imaging device according to the present invention.
  • 50 is a CCD control circuit.
  • Other parts are the same as those shown in the first or second embodiment.
  • FIG. 8 is a block diagram showing the configuration of the CCD control circuit 50.
  • the CCD control circuit 50 is obtained by integrating an amplifier circuit 3, an AZD conversion circuit 4 and a CCD drive circuit 7 with an I / F circuit 60 for communicating with the image control circuit 6 via the bus 12 It is.
  • the control of the CCD can be performed from the image control circuit 6 via the CCD control circuit 50. For this reason, the image signal output from the CCD can be written into the image memory 8 at an arbitrary time, thereby further increasing the degree of freedom in processing.
  • FIG. 9 is a block diagram illustrating a configuration of an imaging device according to the present invention.
  • 70 is a shutter
  • 71 is an autofocus control circuit
  • 72 is a strobe.
  • Other parts are the same as those shown in the embodiment of FIG.
  • highly accurate exposure control by the mechanical shutter 70 and the strobe 72 can be performed by the accurate focus control by the focus control circuit 71.
  • FIG. 10 is a block diagram showing a configuration of an imaging device according to the present invention.
  • reference numeral 13 denotes a mode switching switch, which allows selection of switching among normal mode, character mode, high dynamic range mode, and special effect mode.
  • . 14 is an optical low-pass filter, 15 is polarized light It is a board.
  • the optical low-pass filter 14 is omitted in the block diagrams of FIGS. 1, 6, 7, and 9 because it does not directly relate to the operation of the embodiment described above. Other parts are the same as those shown in the embodiment of FIG. The other parts may be as shown in FIGS.
  • the mode switching will be described. First, the mode is selected by the mode switch.
  • the mode switching switch may be a normal dial type switch or another push type switch.
  • the operation after the mode selection is performed is the same as that of the embodiment described above, but the content of the signal processing performed by the imaging device differs depending on the selected mode.
  • normal signal processing is performed by the same operation as that of the embodiment described above.
  • the character mode is a mode for capturing a monochrome image of a document or the like at a high resolution.
  • the signal processing in the character mode will be described.
  • the luminance signal is generated based on the following equation (8) instead of the above-mentioned equation (7).
  • a signal equivalent to a video signal obtained when an image is captured by a black and white CCD that does not have a false signal (moire) based on the difference in sensitivity between color filters is not generated, and the resolution is improved. Can be. Up The process of setting the above coefficients can be easily performed by the software process of the image control circuit II.
  • the effect of the optical aperture one-pass filter may be removed when the character mode is selected, so that the resolution is further improved.
  • a polarizer 15 may be used. In this case, by adjusting the angle of the polarizing plate, it is possible to enable or disable the one-pass filter by allowing or not allowing human light to pass through. This is described in, for example, Japanese Patent Publication No. 58-141 16. Also, to eliminate the effects of the optical low-pass filter, a polarizer is not used, and the optical one-pass filter is mechanically operated when the character mode is selected by interlocking with the mode switching switch. May be removed from the optical path.
  • Fig. 11 shows the characteristics of the optical low-pass filter when the C C D color filter array is as shown in Fig. 2 (a).
  • fs is the pixel sampling frequency in CCD. Therefore, f s / 3 is a spatial frequency having three pixels as one cycle.
  • the optical aperture one-pass filter in this case has a characteristic that traps enter fs 3 and eliminates the moiré by removing in advance the frequency component fs Z 3 that causes moire in the color signal.
  • the resolution near s Z 3 is lower than the resolution other than fs Z 3. If a luminance signal is generated by the processing as in equation (8), moire does not occur in f s / 3, and thus such an optical aperture one-pass filter becomes unnecessary. If this optical low-pass filter is removed, the response near f s / 3 is greatly improved, and the resolution can be improved.
  • generating a luminance signal using equation (8) is for a case where a CCD equipped with a primary color filter is used.
  • a CCD equipped with a primary color filter For example, the complementary color filter shown in Fig. 2 (c) is used. If there is a river with a evening CCD, the following formula is used.
  • Coefficients Km, Kg, Kc, and Ky applied to each pixel multiplication have primary color filters As in the case of using a CCD, the ratio of the coefficients may be determined so as to be half proportional to the integral value of each west element.
  • the special effect mode is selected by the mode switching switch.
  • the center of the screen has a normal filter characteristic
  • the periphery of the center of the screen has another filter characteristic, so that the periphery of the center of the screen can be blurred.
  • Such processing is performed in the filtering of S110 in the signal processing flow shown in FIG.
  • the area for changing the characteristics of the mouth-to-mouth filter can be set arbitrarily. This is performed by rewriting the program relating to the coordinate axes in the image control circuit.
  • the operation is performed by inputting from a button from an imaging device or input from a personal computer using a mouse or a keyboard (accordingly, a low-pass filter).
  • the process of fixing the area to change the characteristics of the image and the process of extracting a specific subject such as a person from the screen and blurring the background can be performed.
  • (A) shows the image before the special effect is applied,
  • (b) shows the image with the special effect applied, and
  • (b) uses the ordinary filtering for the person in the center of the screen.
  • the surrounding area of the person is subjected to filtering with a strong mouth-to-pass fill, and the surrounding area of the person is blurred.
  • FIG. 10 is a block diagram showing a configuration of an imaging device according to the present invention.
  • 16 in the figure is a setting change terminal.
  • FIG. 13 is a diagram showing the appearance of an imaging device according to the present invention.
  • 100 is an imaging device
  • 1 is a lens
  • 11 is an operation switch
  • 16 is a setting change terminal
  • 17 is an optical finder.
  • the first mode of use is mode switching.
  • a normal mode, a character mode, a special effect mode, or the like for performing normal shooting is selected and switched in the same manner as described in the previous embodiment.
  • an extra configuration for switching the mode such as a switch is required as the mode is increased, and the operation for that is also complicated. Therefore, in this use mode, a setting change device is connected to the setting change terminal 16, and the processing from input from the setting change device to conversion into a predetermined output format performed by the image control circuit is changed. Switch the mode.
  • a rewritable memory such as an EEPROM is provided in the imaging device using a communication software of the setting change device and the imaging device, and the mode setting parameters stored therein are provided. Change the data.
  • a specific mode set at the time of photographing is performed, so that the imaging device does not require an extra configuration for switching the mode such as a switch.
  • the user can easily perform operations on the device itself during shooting. For the latter, for example, if the setting change device is used to switch to the character mode, the imaging device can be operated without switching to the character mode during imaging. Character mode shooting is automatically performed simply by operating the operation switch.
  • the second mode of use is the setting of a new mode.
  • the user can set a new dedicated mode adjusted to the desired image quality by Pi. If this is to be done during the main operation of the imaging device, an extra configuration for setting a new mode is required, and the operation for that is also complicated. Therefore, in this usage mode as well, a setting change device is connected to the setting change terminal 16 and the processing from input from the setting change device to conversion to a predetermined output format performed by the I-plane image control circuit. Change the process and set a new mode.
  • a rewritable memory such as EEPR0M is provided in the imaging device ⁇ using the setting change device and the communication software of the imaging device, and the new mode stored therein is provided.
  • the setting parameters specifically, parameters such as brightness, sharpness, color saturation, hue, and white balance related to image quality control are changed.
  • the new mode is set by the setting change device, it is not necessary to set the new mode at the time of imaging or to switch from each mode described above. By simply operating the operation switch, shooting in the dedicated mode is automatically performed. Also, the information about the dedicated mode once set can be conveniently stored in a setting change device such as a personal computer.
  • the third mode of use is version-up. Improving the performance of imaging devices, specifically image quality and processing speed, and improving the functions of imaging devices, specifically new With the development of new shooting modes, users can change the software only and upgrade the version. Also in this usage mode, a setting change device is connected to the setting change terminal 16 and the version of camera processing or image compression processing performed in the image control circuit is performed by input from the setting change device S.
  • a rewritable memory such as a flash memory is used instead of R ⁇ M33 shown in FIG.
  • the above ⁇ manpower, setting changing device is performed by the communication software Touwea of Apurikeshi 3 down software Bok and imaging device setting change apparatus.
  • the user only has to operate the mouse or keyboard on the screen in accordance with the instructions of the application software, and the camera processing or the image compression processing that has been upgraded in the rewritable memory can be performed.
  • a program to execute is written.
  • the imaging device may be configured so that the entire microcomputer part can be replaced, and the imaging device may be replaced with a microcomputer having improved performance or a new function to perform version up. This is possible for the first time because all processing is performed by the microcomputer.
  • the version is updated by the software or by the hardware as described above, only the part related to the microcomputer is changed, so the other parts are not affected and the version is updated.
  • the operation of the software is also the operation of the mouse and keyboard on the screen of the personal computer in the software, and the operation of the hardware is only replacement of the microcomputer, which affects other parts than replacing the conventional DSP or LSI. It can be done easily without giving
  • the above setting change terminal can be shared with an interface for connecting to a computer.
  • the imaging apparatus of the present invention performs all signal processing by software, and therefore has a high degree of processing freedom. For this reason, dedicated hardware such as a camera DSP is not required, and the cost can be reduced. Also, the content of the signal processing can be changed without changing the configuration of the device.
  • it can be photographed in the character mode, so that both black and white images can be photographed at a high resolution.
  • shooting can be performed in the special effect mode, so that any area in the screen can be emphasized when shooting.
  • the image quality and functions can be set by input from an external device to a setting change terminal.
  • the shooting mode can be switched. This eliminates the need for an extra configuration for switching the mode, and allows the imaging device to be downsized.
  • the specific mode that has been switched in advance is performed at the time of shooting, so operation on the device body is simple.
  • a new shooting mode can be set. This eliminates the need for an extra configuration for setting a new mode or switching to another shooting mode, and thus allows the imaging apparatus to be downsized.
  • the operation of the device itself is easy because the dedicated mode processing set in advance is performed during shooting.
  • camera processing or image compression processing can be upgraded.
  • the processing level of the imaging device can be raised as needed with the development of the software. For example, it can support high pixel still and moving image processing in the future.
  • the version up of force camera processing or image compression processing can also be performed by replacing both image control circuits.
  • the processing level of the imaging device can be raised as needed with the development of microcomputers and the like. For example, it can handle high pixel still images and moving image processing in the future.
  • the above version up can be performed without affecting parts other than the image control circuit. Also, the version up operation is as simple as operating the mouse and keyboard on a personal computer and replacing the microcomputer itself.

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  • Color Television Image Signal Generators (AREA)

Abstract

La présente invention concerne un traitement de caméra permettant de modifier le format des signaux d'image convertis photo électriquement et numérisés par un dispositif à couplage de charge (CCD) en un format prédéterminé de sortie et avec traitement de compression d'image. Les opérations de traitement sont exécutées par un moyen arithmétique selon un programme dans lequel la procédure des opérations est écrite. Ainsi, une image fixe est générée selon un procédé logiciel. Le degré de liberté du traitement de signal dans le dispositif de prise d'image est accru et la qualité de l'image prise se trouve améliorée par le dispositif de prise d'image et les fonctions ainsi que l'opérabilité du dispositif sont améliorées sans unité supplémentaire.
PCT/JP1996/002626 1996-09-13 1996-09-13 Dispositif de prise d'image WO1998011719A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP1996/002626 WO1998011719A1 (fr) 1996-09-13 1996-09-13 Dispositif de prise d'image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP1996/002626 WO1998011719A1 (fr) 1996-09-13 1996-09-13 Dispositif de prise d'image

Publications (1)

Publication Number Publication Date
WO1998011719A1 true WO1998011719A1 (fr) 1998-03-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/002626 WO1998011719A1 (fr) 1996-09-13 1996-09-13 Dispositif de prise d'image

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Country Link
WO (1) WO1998011719A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005020722A (ja) * 2003-06-25 2005-01-20 Quicksilver Technology Inc デジタル・イメージ処理装置
JP2007088965A (ja) * 2005-09-26 2007-04-05 Casio Hitachi Mobile Communications Co Ltd 画像出力装置及びプログラム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0334784A (ja) * 1989-06-30 1991-02-14 Casio Comput Co Ltd 画像処理装置
JPH06105333A (ja) * 1992-09-22 1994-04-15 Canon Inc 画像信号処理装置
JPH06197305A (ja) * 1991-11-01 1994-07-15 Nikon Corp 電子スチルカメラ
JPH06276471A (ja) * 1993-03-22 1994-09-30 Canon Inc 記録再生装置
JPH07123421A (ja) * 1993-10-27 1995-05-12 Canon Inc 撮像装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0334784A (ja) * 1989-06-30 1991-02-14 Casio Comput Co Ltd 画像処理装置
JPH06197305A (ja) * 1991-11-01 1994-07-15 Nikon Corp 電子スチルカメラ
JPH06105333A (ja) * 1992-09-22 1994-04-15 Canon Inc 画像信号処理装置
JPH06276471A (ja) * 1993-03-22 1994-09-30 Canon Inc 記録再生装置
JPH07123421A (ja) * 1993-10-27 1995-05-12 Canon Inc 撮像装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
THE JOURNAL OF THE INST. OF TELEVISION ENGINEERS OF JAPAN, Vol. 48, No. 1, January 1994, KIICHI MATSUDA, FUMITAKA ASAMI, OSAMU KAWAI, "LSI for Image Encoding", p. 31-37. *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005020722A (ja) * 2003-06-25 2005-01-20 Quicksilver Technology Inc デジタル・イメージ処理装置
JP2007088965A (ja) * 2005-09-26 2007-04-05 Casio Hitachi Mobile Communications Co Ltd 画像出力装置及びプログラム

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