JP2010118759A - Imaging apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it is more difficult to search a camera than on the ground if the camera is dropped in water since visibility is unfavorable due to deterioration in the transparency of water or the like in an underwater environment, and various shapes, colors, coral, seaweeds, etc. exist on the bottom of the sea. <P>SOLUTION: Acceleration applied to an imaging apparatus is detected to acquire acceleration information and the drop of the imaging apparatus in water is detected from a relation between compared results of the acceleration information with a plurality of reference acceleration degrees, and a detection time. When the drop of the imaging apparatus is detected, a user is informed of the position of the imaging apparatus by using a light-emitting means and/or a sound means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an imaging apparatus that captures, stores, records, and reproduces a still image or a moving image having a light emitting unit or an audio unit, and relates to detection of a fall position when falling in water.

  Digital cameras are expected to be used in various environments, and in recent years, cameras that can be used without waterproof cases even in underwater environments have begun to spread. Underwater environments have poor visibility due to the transparency of water, and the sea floor has various shapes, colors, corals, seaweeds, etc. Have difficulty.

As a technique for detecting the fall of a device on land, the technique disclosed in Patent Document 1 proposes a method for detecting a fall from a change in acceleration in a portable device having a hard disk and protecting the hard disk from an impact at the time of the fall. ing.
JP 2007-213698

  However, since buoyancy works in an underwater environment, no acceleration output like land is detected when falling. Since the change in acceleration at the time of falling is small compared to the land, there is a possibility of erroneous detection during normal use only by detecting the acceleration at the time of falling.

  An object of the present invention is to detect a fall of an imaging device in water and notify the user of the position of the imaging device that has dropped.

  In order to solve the above problems, an imaging apparatus of the present invention has the following configuration.

The invention described in claim 1
An imaging device for imaging a subject to generate an image signal,
Light emitting means for illuminating the subject, audio means for reproducing audio signals,
Acceleration detecting means for detecting acceleration applied to the imaging device and outputting acceleration information;
Acceleration calculation means for calculating an output from the acceleration detection means;
An acceleration comparison means for comparing the calculation result of the acceleration calculation means with one or a plurality of reference accelerations, and a time measurement means for measuring time with respect to the comparison result of the acceleration comparison means,
From the results of the acceleration comparison unit and the time measurement unit, there is a state determination unit that determines an operation state of the imaging device,
When it is determined that the state has been dropped by the state determination unit, a warning unit is provided to notify that the imaging apparatus has left the owner.

Next, the invention described in claim 2
An imaging device for imaging a subject to generate an image signal,
Light emitting means for illuminating the subject, audio means for reproducing audio signals,
Acceleration detecting means for detecting acceleration applied to the imaging device and outputting acceleration information;
Acceleration calculation means for calculating an output from the acceleration detection means;
An acceleration comparison means for comparing the calculation result of the acceleration calculation means with one or a plurality of reference accelerations, and a time measurement means for measuring time with respect to the comparison result of the acceleration comparison means,
Comprising underwater detection means, and when the underwater detection means determines that the imaging device is in an underwater environment, the underwater detection means includes power supply control means for controlling a power supply necessary for operating the imaging device. To do.

Furthermore, the invention according to claim 9 is
An imaging device for imaging a subject to generate an image signal,
Light emitting means for illuminating the subject, audio means for reproducing audio signals,
Acceleration detecting means for detecting acceleration applied to the imaging device and outputting acceleration information;
Acceleration calculation means for calculating the detected output from the acceleration detection means;
Acceleration comparison means for comparing the first calculation result of the acceleration calculation means with a first reference acceleration;
The acceleration comparing means includes time measuring means for measuring a time during which the first calculation result of the acceleration calculating means is below the first reference acceleration, and the time measured by the time measuring means is a first time. After that,
The acceleration comparison means includes time measurement means for measuring a time during which the second calculation result of the acceleration calculation means exceeds a second reference acceleration, and a time measured by the time measurement means is equal to or less than a second time. And
When the third calculation result of the acceleration calculation means is within a third reference acceleration range for a third time,
A state determination unit that determines an operation state of the imaging device;
When it is determined that the state has been dropped by the state determination unit, a warning unit is provided to notify that the imaging apparatus has left the owner.

  ADVANTAGE OF THE INVENTION According to this invention, the fall of an imaging device can be detected in water and a user can be notified of the position of the imaging device which fell.

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

  FIG. 1 is a diagram illustrating a configuration of an imaging apparatus according to the present invention.

  In FIG. 1, 100 is an overall view of the image processing apparatus.

  Reference numeral 12 denotes a shutter for controlling the exposure amount to the imaging unit 14, and reference numeral 14 denotes an imaging unit that converts an optical image into an electrical signal.

  The light beam incident on the lens 310 can be guided through the aperture 312 and the shutter 12 and can be formed on the imaging unit 14 as an optical image. The imaging unit 14 includes a solid-state imaging device such as a CCD.

  Reference numeral 16 denotes a CDS circuit that samples and holds a signal from the imaging unit 14 (hereinafter referred to as S / H) and performs correlated double sampling. Reference numeral 17 denotes an A / D converter that converts an analog signal output from the CDS circuit 16 into a digital signal. Reference numeral 15 shown by a broken line frame is an analog image signal region including the image pickup unit 14, the CDS circuit 16, and the A / D conversion unit 17.

  Reference numeral 18 denotes a timing generation circuit that supplies a clock signal and a control signal to the imaging unit 14, the CDS circuit 16, the A / D conversion unit 17, and the D / A converter 26, and is controlled by the memory control circuit 22 and the system control circuit 50. The

  An image processing circuit 20 performs predetermined pixel interpolation processing and color conversion processing on the data from the A / D conversion unit 17 or the data from the memory control circuit 22.

  In the image processing circuit 20, a predetermined calculation process is performed using the captured image data as necessary, and the system control circuit 50 controls the shutter 12 having an aperture function based on the obtained calculation result. Control is performed on the shutter control means 40 and the distance measurement control means 42. TTL (through the lens) AF (autofocus) processing, AE (automatic exposure) processing, and EF (flash dimming) processing can be performed.

  Further, the image processing circuit 20 performs predetermined arithmetic processing using the captured image data, and also performs TTL AWB (auto white balance) processing based on the obtained arithmetic result.

  In the present embodiment, since the distance measuring means 42 and the photometry means 46 are exclusively provided, AF (autofocus) processing, AE (automatic exposure) processing, EF using the distance measuring means 42 and photometry means 46 are used. (Flash dimming) processing is performed, and AF (autofocus) processing and AE (automatic exposure) processing using the image processing circuit 20 are not performed. However, each of AF (autofocus) processing, AE (automatic exposure) processing, and EF (flash dimming) processing is performed using the distance measuring means 42 and the photometry means 46, and the image processing circuit 20 is used. A configuration in which AF (autofocus) processing and AE (automatic exposure) processing are performed may be employed.

  Reference numeral 22 denotes a memory control circuit which controls the A / D conversion unit 17, the timing generation circuit 18, the image processing circuit 20, the image display memory 24, the D / A converter 26, the memory 30, and the compression / decompression circuit 32.

  The data of the A / D converter 17 is written into the image display memory 24 or the memory 30 via the image processing circuit 20 and the memory control circuit 22 or the data of the A / D converter 17 is directly passed through the memory control circuit 22. It is.

  Reference numeral 24 denotes an image display memory, 26 denotes a D / A converter, and 28 denotes an image display unit composed of a TFT LCD or the like. Display image data written in the image display memory 24 passes through the D / A converter 26. Displayed by the image display unit 28.

  By sequentially displaying image data captured using the image display unit 28, an electronic viewfinder function can be realized.

  Further, the image display unit 28 can arbitrarily turn on / off the display according to an instruction from the system control circuit 50. When the display is turned off, the power consumption of the image processing apparatus 100 can be greatly reduced. I can do it.

  Reference numeral 30 denotes a memory for storing captured still images and moving images, and has a sufficient storage capacity to store a predetermined number of still images and a predetermined time of moving images.

  Thereby, even in the case of continuous shooting or panoramic shooting in which a plurality of still images are continuously shot, it is possible to write a large amount of images to the memory 30 at high speed.

  The memory 30 can also be used as a work area for the system control circuit 50.

  A compression / decompression circuit 32 compresses and decompresses image data by adaptive discrete cosine transform (ADCT) or the like. The image stored in the memory 30 is read, compression processing or decompression processing is performed, and the processed data is written in the memory 30.

  Reference numeral 40 denotes shutter control means for controlling the shutter 12 in cooperation with the aperture control means 340 for controlling the aperture 312 based on photometric information from the photometry means 46.

  Reference numeral 42 denotes a distance measuring means for performing AF (autofocus) processing. By making a light beam incident on the lens 310 enter the distance measuring means 42 through a diaphragm 312 and a distance measuring sub mirror (not shown), The in-focus state of an image formed as an optical image can be measured.

  Reference numeral 46 denotes photometric means for performing AE (automatic exposure) processing. A light beam incident on the lens 310 is made incident on the photometric means 46 through the aperture 312 and a photometric lens (not shown), whereby an optical image is obtained. As a result, the exposure state of the image formed can be measured.

  The system control circuit 50 controls the shutter control unit 40, the aperture control unit 340, and the distance measurement control unit 342 based on the calculation result obtained by calculating the image data captured by the imaging unit 14 by the image processing circuit 20. It is also possible to perform exposure control and AF (autofocus) control using the video TTL method. The system control circuit 50 can detect the vertical and horizontal postures of the image processing apparatus 100 from the posture detection sensor 67, and can be used for exposure control and AF (autofocus) control.

  Further, AF (autofocus) control may be performed using both the measurement result by the distance measuring means 42 and the calculation result obtained by calculating the image data captured by the imaging unit 14 by the image processing circuit 20.

  The exposure control may be performed using both the measurement result obtained by the photometry unit 46 and the calculation result obtained by calculating the image data captured by the imaging unit 14 by the image processing circuit 20.

  Reference numeral 50 denotes a system control circuit that controls the entire image processing apparatus 100, and reference numeral 52 denotes a memory that stores constants, variables, programs, and the like for operation of the system control circuit 50.

  Reference numeral 54 denotes a display unit such as a liquid crystal display device or a speaker that displays an operation state, a message, and the like using characters, images, sounds, and the like in accordance with execution of a program in the system control circuit 50. One or a plurality of positions are provided near the operation unit of the image processing apparatus 100 so as to be visually recognized, and are configured by a combination of, for example, an LCD, an LED, and a sounding element.

  The display contents of the display unit 54 include, for example, single shot / continuous shooting display, self-timer display, compression rate display, recording pixel number display, recording number display, remaining image number display, shutter speed display, aperture value display, Exposure compensation display, red-eye reduction display, macro shooting display, buzzer setting display, clock battery level display, battery level display, error display, information display with multiple digits, display status of recording media 200 and 210, lens Unit 300 attach / detach status display, communication I / F operation display, date / time display, connection status display with external computer, focus display, shooting preparation completion display, camera shake warning display, flash charge display, flash charge completion Display, shutter speed display, aperture value display, exposure correction display, recording medium writing operation display, and the like.

  Reference numeral 56 denotes an electrically erasable / recordable nonvolatile memory, such as an EEPROM.

  Reference numerals 60, 62, 64, 66, and 70 are operation means for inputting various operation instructions of the system control circuit 50, and include one or a plurality of switches, dials, touch panels, pointing by line-of-sight detection, voice recognition devices, and the like. Composed of a combination.

  Here, a specific description of these operating means will be given.

  Reference numeral 60 denotes a mode dial switch, which is a mode changeover switch for distinguishing between starting of the normal still image shooting mode and the moving image shooting mode. Reference numeral 62 denotes a shutter switch SW1, which is turned ON during operation of a shutter button (not shown), and performs AF (auto focus) processing, AE (automatic exposure) processing, AWB (auto white balance) processing, EF (flash light control) processing, and the like. Instruct to start operation.

  Reference numeral 64 denotes a shutter switch SW2, which is turned on when an operation of a shutter button (not shown) is completed. If the off state is maintained depending on the state of the mode switch 60, the operation shifts to a still image shooting operation and the on state is maintained. If it is, move to the video shooting operation. Then, after shifting to the respective photographing operation modes, exposure processing for writing the image data into the memory 30 through the A / D conversion unit 17 and the memory control circuit 22 for the signal read from the imaging unit 14, the image processing circuit 20 and the memory control Instructs the start of a series of processes such as a development process using the calculation in the circuit 22, a recording process in which image data is read out from the memory 30, compressed in the compression / decompression circuit 32, and written into the recording medium 200 or 210. To do.

  Reference numeral 66 denotes a playback switch, which instructs the start of a playback operation in which a shot image is read from the memory 30 or the recording medium 200 or 210 and displayed by the image display unit 28 in the shooting mode state.

  70 is an operation unit composed of various buttons, a touch panel, etc., a menu button, a set button, a macro button, a multi-screen playback page break button, a flash setting button, a single shooting / continuous shooting / self-timer switching button, menu movement + (plus) Button, menu shift-(minus) button, playback image shift + (plus) button, playback image-(minus) button, shooting quality selection button, exposure compensation button, date / time setting button, panorama mode shooting and playback Selection / switching button for setting selection and switching of various functions at the time of execution, determination / execution button for setting determination and execution of various functions at the time of executing shooting and playback in panorama mode, etc., ON of the image display unit 28 Image display ON / OFF switch to set / OFF, quick playback of image data taken immediately after shooting Quick review ON / OFF switch for setting the view function, compression mode switch for selecting the CCDRAW mode for selecting the compression rate of JPEG compression or digitizing the image signal as it is and recording it on the recording medium, Playback switch that can set each function mode such as playback mode, multi-screen playback / erase mode, PC connection mode, etc.Auto focus operation starts when the shutter switch SW1 is pressed, and once it is in focus There is an AF mode setting switch that can set the one-shot AF mode that keeps the state and the servo AF mode that keeps autofocusing continuously while pressing the shutter switch SW1.

  In addition, the functions of the plus button and the minus button can be selected more easily by providing a rotary dial switch.

  Reference numeral 72 denotes a power switch, which can switch and set the power-on and power-off modes of the image processing apparatus 100. Also, the power on and power off settings of various accessory devices such as the lens unit 300, the external strobe, and the recording media 200 and 210 connected to the image processing apparatus 100 can be switched.

  Reference numeral 74 denotes a real time clock circuit, whereby the system control circuit 50 measures the elapsed time and realizes various timer functions.

  80 is a power control means, which is composed of a battery detection circuit, a DC-DC converter, a switch circuit for switching a block to be energized, etc., and detects the presence / absence of a battery, the type of battery, the remaining battery level, and the detection result In addition, the DC-DC converter is controlled based on an instruction from the system control circuit 50, and a necessary voltage is supplied to each part including the recording medium for a necessary period.

  Reference numeral 82 denotes a connector, 84 denotes a connector, and 86 denotes a power source means including a primary battery such as an alkaline battery or a lithium battery, a secondary battery such as a NiCd battery, a NiMH battery, or a Li battery, or an AC adapter.

  90 and 94 are interfaces with a recording medium such as a memory card or a hard disk, 92 and 96 are connectors for connecting to a recording medium such as a memory card or a hard disk, and 98 is a recording medium 200 or 210 attached to the connector 92 or 96. Recording medium attachment / detachment detecting means for detecting whether or not the recording medium is present.

  A communication unit 110 has various communication functions such as RS232C, USB, IEEE1394, P1284, SCSI, modem, LAN, and wireless communication.

  Reference numeral 112 denotes a connector for connecting the image processing apparatus 100 to another device by the communication unit 110 or an antenna in the case of wireless communication.

Reference numeral 120 denotes an interface for connecting the image processing apparatus 100 to the lens unit 300, and 122 denotes a connector for electrically connecting the image processing apparatus 100 to the lens unit 300.
Reference numeral 200 denotes a recording medium such as a memory card or a hard disk.

  The recording medium 200 includes a recording unit 202 composed of a semiconductor memory, a magnetic disk, or the like, an interface 204 with the image processing apparatus 100, and a connector 206 for connecting to the image processing apparatus 100.

  Reference numeral 210 denotes a recording medium such as a memory card or a hard disk.

  The recording medium 210 includes a recording unit 212 composed of a semiconductor memory, a magnetic disk, and the like, an interface 214 with the image processing apparatus 100, and a connector 216 that connects to the image processing apparatus 100.

  Reference numeral 310 denotes a photographing lens, and 312 denotes an aperture.

  The connector 322 may be configured to transmit not only electrical communication but also optical communication, voice communication, and the like.

  Reference numeral 340 denotes aperture control means for controlling the aperture 312 in cooperation with the shutter control means 40 for controlling the shutter 12 based on photometric information from the photometry means 46.

  Reference numeral 342 denotes distance measurement control means for controlling the focusing of the photographing lens 310, and reference numeral 344 denotes zoom control means for controlling zooming of the photographing lens 310.

  A lens system control circuit 350 controls the entire lens unit that controls the aperture, distance measurement, and zoom. The lens system control circuit 350 includes a memory for storing operation constants, variables, programs and the like, identification information such as a number unique to the lens unit 300, management information, function information such as an open aperture value, a minimum aperture value, a focal length, It also has a non-volatile memory function for holding current and past set values.

  Reference numerals 155 and 161 denote microphones for recording voices, 157 denotes recorded voices or speakers for reproducing voices stored in the apparatus in advance, and 159 denotes voices input from the microphones 155 and 161 to the apparatus. This is an audio analog-to-digital converter for analog-digital conversion to an optimum level and format for transmission, and audio data output from the apparatus for digital-analog conversion to be sent to a speaker 157.

  Reference numeral 400 denotes an acceleration sensor that detects an acceleration signal, and the detection signal is sent to the system control circuit 50 to perform comparison with a reference acceleration and time measurement.

  Reference numeral 410 denotes an underwater / land setting unit for setting the underwater or land from the system control circuit 50. In this embodiment, the underwater setting is performed by the user, but a method of determining that the user is in an underwater environment by using a sensor or the like may be used.

  2 and 9 are block diagrams showing the configuration of the drop detection method in this embodiment.

  In FIG. 2, reference numeral 501 denotes acceleration detection means for detecting the acceleration of the imaging apparatus, and 502 denotes calculation means for calculating a signal from the acceleration detection means. The acceleration detection means 501 can detect by using an acceleration sensor, and always detects the acceleration of the imaging device. Reference numeral 503 denotes acceleration comparison means for comparing the result of the calculation means 502 with the first reference acceleration (504), the second reference acceleration 2 (505), and the third reference acceleration (506).

  Reference numeral 507 denotes time measurement means for measuring the duration of the result of the acceleration comparison means 503, reference numeral 508 denotes drop determination means for performing drop determination, and reference numeral 509 denotes position information transmission means for transmitting position information when the drop determination is made.

  In FIG. 9, reference numeral 701 denotes an underwater determination unit that determines that the user is in an underwater environment or determines that the user is in an underwater environment by detecting the image pickup apparatus. Reference numeral 702 denotes power supply means, which is a power supply control means for controlling the power supply of the acceleration detection means 703, acceleration calculation means 704, acceleration comparison means 705, time measurement means 709, drop determination means 710, and position information transmission means 711.

  Reference numerals 706 to 708 denote a first reference acceleration (706), a second reference acceleration 2 (707), and a third reference acceleration (708), and the structure after 703 is the same as that shown in FIG.

  FIG. 3 shows the relationship between the coordinate axes of the imaging device and the triaxial acceleration sensor. In the case of a triaxial acceleration sensor, acceleration in the X, Y, and Z axis directions can be detected. When acceleration is applied to the imaging device, acceleration signals (Ax, Ay, Az) in the X axis, Y axis, and Z axis directions Is detected. Under an underwater environment, as shown in FIG. 4, buoyancy depending on the volume of the imaging device works. Therefore, the output signal from the acceleration sensor is output by the gravitational acceleration G via the calculation means (502, 704) in FIGS. The combined acceleration Asum of the buoyancy F and the acceleration A applied when the imaging device moves is obtained. Drop detection is performed using this Asum value.

  FIGS. 5 and 6 show the time change of the resultant acceleration Asum, and the fall detection method will be described with reference to the flowcharts of FIGS.

  In S100 of FIG. 7, accelerations (Ax, Ay, Az) of three-axis components are output from the acceleration detection means (501, 703) of FIGS. In S102, the combined acceleration Asum is calculated from the accelerations (Ax, Ay, Az) of the three-axis components output in S100 in the calculation means (502, 704).

  The combined acceleration Asum is obtained by the following equation.

Asum = √ {(Ax) ^ 2 + (Ay) ^ 2 + (Az) ^ 2}
In S104, the first reference acceleration α and the combined acceleration Asum are compared, and time is measured in the time measuring means (507, 709) while Asum <α. If the measurement time of the time measurement means (507, 709) satisfies T1> Ta, the process proceeds to S106.

  In S106, the second reference acceleration β and the combined acceleration Asum are compared, and time is measured in the time measuring means (507, 709) while Asum> β. When the measurement time of the time measurement means (507, 709) becomes T2 <Tb, the process proceeds to S108.

  In S108, the third reference accelerations γ1 and γ2 are compared with the resultant acceleration Asum, and time is measured in the time measuring means (507, 709) while γ1 <Asum <γ2. If the measurement time of the time measurement means (507, 709) satisfies T3> Tc, it is determined in S110 that the imaging device has dropped.

  Here, as shown in S308 of FIG. 8, the third reference acceleration may be equal to the gravitational acceleration G, and the comparison condition with the combined acceleration Asum may be Asum = 1G.

  The conditions other than S308 in FIG. 8 are the same as those in FIG.

  If it is determined in S110 that it has fallen, in S112, the light emitting means and / or the sound means of the imaging apparatus are operated to notify the user of the location of the imaging apparatus.

  For example, when using a light emitting means, strobe light is emitted intermittently and the location is notified to the user using light.

  Also, when using audio means, a beep sound or other audio signal is output continuously or intermittently, and the user is notified of the location using the sound.

  In the present invention, in order to detect the position of the imaging device that has fallen in water, it is determined from the relationship between acceleration and time that the imaging device has fallen. Since buoyancy works underwater, acceleration does not change as much as free fall detection on land. For this reason, there is a possibility of erroneous detection when only the acceleration at the time of dropping in water is determined. In the present invention, the relationship between acceleration and time is detected when the vehicle is dropped in water, when it collides with the seabed, or when it is stationary on the seabed. Inform the drop position.

1 is an overall configuration block diagram of an embodiment to which the present invention can be applied. The block diagram of the structure of the fall detection method which can apply this invention. The relationship between the imaging device to which the present invention can be applied and the coordinate axes of the three-axis acceleration sensor. Relationship between gravitational acceleration and buoyancy applied to an imaging apparatus to which the present invention can be applied. Time change of the combined acceleration when detecting underwater fall. Time change of the combined acceleration when detecting underwater fall. The flowchart of the fall detection method which can apply this invention. The flowchart of the fall detection method which can apply this invention. The block diagram of the configuration of the fall detection technique to which the present invention can be applied.

Explanation of symbols

DESCRIPTION OF SYMBOLS 12 Mechanical shutter 14 Image pick-up part 16 CDS circuit 17 A / D converter 18 Timing generation circuit 20 Image processing circuit 22 Memory control circuit 30 Image memory 40 Shutter control means 42 Distance control means 46 Photometry means 50 System control circuit 60 Mode dial switch 62 Shutter switch 1
64 Shutter switch 2
67 Attitude detection sensor 155, 161 Microphone 157 Speaker 159 Audio analog-digital converter 400 Acceleration sensor

Claims (11)

An imaging device for imaging a subject to generate an image signal,
Light emitting means for illuminating the subject, audio means for reproducing audio signals,
Acceleration detecting means for detecting acceleration applied to the imaging device and outputting acceleration information;
Acceleration calculation means for calculating an output from the acceleration detection means;
An acceleration comparison means for comparing the calculation result of the acceleration calculation means with one or a plurality of reference accelerations, and a time measurement means for measuring time with respect to the comparison result of the acceleration comparison means,
From the results of the acceleration comparison unit and the time measurement unit, there is a state determination unit that determines an operation state of the imaging device,
An imaging apparatus comprising: warning means for notifying that the imaging apparatus has left the owner when the state determination means determines that the camera has dropped. An imaging device for imaging a subject to generate an image signal,
Light emitting means for illuminating the subject, audio means for reproducing audio signals,
Acceleration detecting means for detecting acceleration applied to the imaging device and outputting acceleration information;
Acceleration calculation means for calculating an output from the acceleration detection means;
An acceleration comparison means for comparing the calculation result of the acceleration calculation means with one or a plurality of reference accelerations, and a time measurement means for measuring time with respect to the comparison result of the acceleration comparison means,
Comprising underwater detection means, and when the underwater detection means determines that the imaging device is in an underwater environment, the underwater detection means includes power supply control means for controlling a power supply necessary for operating the imaging device. An imaging device.   3. The imaging apparatus according to claim 2, wherein the power source control unit controls a power source of an acceleration detection unit, an acceleration calculation unit, an acceleration comparison unit, a time measurement unit, a state determination unit, and a warning unit. .   The imaging apparatus according to claim 1, wherein the warning unit is a light emitting unit.   The imaging apparatus according to claim 1, wherein the warning unit is an audio unit. The imaging apparatus according to claim 4,
An imaging apparatus, wherein the light emission amount of the light emitting means is set to a maximum value that can be set. The imaging apparatus according to claim 5,
An image pickup apparatus characterized in that a volume of the sound means is set to a maximum value that can be set.   The imaging apparatus according to claim 1, wherein the imaging apparatus is effective when it is detected or set to be in an underwater environment. An imaging device for imaging a subject to generate an image signal,
Light emitting means for illuminating the subject, audio means for reproducing audio signals,
Acceleration detecting means for detecting acceleration applied to the imaging device and outputting acceleration information;
Acceleration calculation means for calculating the detected output from the acceleration detection means;
Acceleration comparison means for comparing the first calculation result of the acceleration calculation means with a first reference acceleration;
The acceleration comparing means includes time measuring means for measuring a time during which the first calculation result of the acceleration calculating means is below the first reference acceleration, and the time measured by the time measuring means is a first time. After that,
The acceleration comparison means includes time measurement means for measuring a time during which the second calculation result of the acceleration calculation means exceeds a second reference acceleration, and a time measured by the time measurement means is equal to or less than a second time. And
When the third calculation result of the acceleration calculation means is within a third reference acceleration range for a third time,
A state determination unit that determines an operation state of the imaging device;
An imaging apparatus comprising: warning means for notifying that the imaging apparatus has left the owner when the state determination means determines that the camera has dropped.   The imaging apparatus according to claim 9, wherein the third reference acceleration range is an acceleration equal to a gravitational acceleration.   The imaging apparatus according to claim 1, wherein the state determination unit performs a fall determination of the imaging apparatus.

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