JP5747889B2 - Visible light communication system, light emitting unit, imaging device, and visible light communication method - Google Patents

Description

  The present invention relates to a visible light communication system, a light emitting unit, an imaging device, and a visible light communication method suitable for photographing a specific moment using an imaging device, for example.

  Conventionally, various techniques have been devised or commercialized in order to suppress the release time lag that occurs when shooting with a camera and to execute shooting at the timing as intended by the photographer. For example, in remote control photography using a camera-dedicated remote controller, a technique that suppresses the release time lag as much as possible has been considered. (For example, Patent Document 1)

JP 2003-195409 A

  If you want to capture the moment when the subject moves characteristically, such as the moment when the batter swinging in baseball meets the pitcher's pitch using the camera of the type described above, There is nothing, but the photographer himself must be proficient in that kind of shooting technique, or can take a number of images that are continuous in time, including the intended moment using camera equipment capable of high-speed continuous shooting.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to take an image of a moment intended by a photographer.

  One embodiment of the present invention is a light-emitting unit that emits visible light on which arbitrary information is superimposed, and information obtained by receiving visible light from the light-emitting unit and acquiring information superimposed on the received visible light. In the visible light communication system having a light receiving unit that performs an operation corresponding to the light emitting unit, the light emitting unit has a detection unit that detects an impact received by the light emitting unit, and a magnitude of the shock detected by the detection unit is preset. Determination means for determining whether or not the threshold value is exceeded, and transmission control means for transmitting visible light superimposed with information according to the determination result of the determination means. An imaging unit that captures an image, a holding unit that continues to hold a predetermined number of images captured by the imaging unit, and an image that is captured by the imaging unit are superimposed on visible light. A visible light information acquisition unit that demodulates and acquires information; and a recording control unit that controls recording of an image held by the holding unit based on information obtained by the visible light information acquisition unit. To do.

  According to the present invention, it is possible to take an image of a moment intended by a photographer.

1 is a block diagram showing a functional circuit configuration of a digital camera as a light receiving unit according to an embodiment of the present invention. The block diagram which shows the circuit structure of the light emission unit of the visible light communication system which concerns on the same embodiment. The flowchart which shows the processing content by the light emission unit side which concerns on the same embodiment. 5 is a flowchart showing the processing content of a visible light automatic photographing mode on the digital camera side according to the embodiment. The figure which shows the scene where the person wearing the wristband which concerns on the embodiment is playing tennis as a temporally continuous image. 6 is a diagram illustrating a trimming range for an image held in the image buffer according to the embodiment. FIG.

  Hereinafter, an embodiment in which the present invention is applied to a visible light communication system including a light emitting unit and a light receiving unit for sports photography will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram showing a functional configuration of a digital camera 10 (imaging device) serving as the light receiving unit. In the same figure, an optical image of a subject is formed on the imaging surface of a CMOS image sensor 12 that is a solid-state imaging device by an optical lens unit 11 disposed on the front surface of the camera casing.

  In the monitor state, also referred to as through image display or live view image display, an image signal obtained by imaging with the CMOS image sensor 12 is sent to the image processing unit 13 to perform correlation square sampling, automatic gain adjustment, A / D conversion. Execute the process and digitize it. The image processing unit 13 further performs color process processing including pixel interpolation processing and γ correction processing on the digital image data, and then temporarily stores the digital data in the image buffer 14 via the system bus SB1.

  The image data held in the image buffer 14 is read out to the image processing unit 13 via the system bus SB1, and the image size is greatly reduced and then sent to the display unit 15 via the system bus SB1 again to be displayed as a monitor image. .

  The control unit 16 performs overall control of the above process. The control unit 16 includes a CPU and is directly connected to the main memory 17 and the program memory 18. The main memory 17 is composed of SDRAM (synchronous DRAM) and functions as a work memory. The program memory 18 is composed of an electrically rewritable non-volatile memory, and fixedly stores an operation program including recording in a sport shooting mode, which will be described later, various data, and the like.

  The control unit 16 reads out necessary programs, data, and the like from the program memory 18 and executes the control operation of the entire digital camera 10 while being temporarily expanded and stored in the main memory 17.

  Further, the control unit 16 executes various control operations in response to key operation signals directly input from the key input unit 19. In addition to the image processing unit 13, the image buffer 14, and the display unit 15, the control unit 16 further includes a lens driving unit 20, a flash driving unit 21, a CMOS driving unit 22, an audio processing unit 23, and a decoding unit via the system bus SB1. 24, the memory card 25, and the indicator unit 26 are also connected.

  The key input unit 19 includes, for example, a power key, shutter key, zoom key, shooting mode key, playback mode key, menu key, cursor (“↑”, “→”, “↓”, “←”) key, set key, and the like.

  The lens driving unit 20 receives a control signal from the control unit 16 and controls the rotation of the lens stepping motor (M) 27, and a part of the plurality of lenses constituting the optical lens unit 11, specifically, Moves the position of the focus lens and the zoom lens individually along the optical axis direction.

  The flash drive unit 21 receives a control signal from the control unit 16 during still image shooting, and drives the flash unit 28 including a plurality of white high-intensity LEDs to be lit in synchronization with the shooting timing.

  The CMOS drive unit 22 scans and drives the CMOS image sensor 12 according to the shooting conditions set at that time.

  When shooting a still image associated with the shutter key operation of the key input unit 19, the image processing unit 13 converts the image data held in the image buffer 14 into a predetermined data file format, for example, JPEG (Joint Photographic Experts Group). Data compression processing such as DCT (Discrete Cosine Transform) or Huffman coding is performed to create an image data file with a greatly reduced data amount. The created image data file is recorded in the memory card 25 via the system bus SB1.

  The image processing unit 13 receives the image data read from the memory card 25 in the reproduction mode via the system bus SB1, and the original size image data by the decompression process in which the compression is performed in the reverse procedure to the recording time. Is stored in the image buffer 14 via the system bus SB1. Then, display for reproduction is executed on the display unit 15 by the image data held in the image buffer 14.

  Note that the image processing unit 13 captures a plurality of pieces of image data held in the image buffer 14 in a predetermined data file format, for example, H.264, at the time of moving image shooting. For H.264 / AVC (MPEG-4 Part 10 / Advanced Video Coding), data such as DCT (Discrete Cosine Transform), variable length coding, and motion compensation inter-frame prediction coding using GOP (Group Of Pictures) as a unit. The amount of data is greatly reduced by performing compression processing, and the created image data files are sequentially recorded on the memory card 25, and a series of data recorded on the memory card 25 when all the image data files have been recorded. The image data files are set to be combined as one data file.

  In addition, the image processing unit 13 obtains image data of a normal dimension size by decompression processing that decompresses a series of image data read from the memory card 25 in the moving image data reproduction mode in the reverse procedure of recording. These are sequentially held in the image buffer 14 sequentially in time, and display for reproduction is continuously executed on the display unit 15 by the image data held in the image buffer 14.

  The audio processing unit 23 converts the audio signal input from the microphone 29 disposed on the front surface of the camera housing in the same manner as the optical lens unit 11 into digital data, and a predetermined data file format such as AAC (moving picture experts group-4). An audio data file is created by compressing the data in the Advanced Audio Coding) format and sent to the memory card 25.

  In addition, the audio processing unit 23 includes a tone generator circuit such as a PCM tone generator, and is provided on the back side of the digital camera 10 by uncompressing and converting the audio data file sent from the memory card 25 during audio reproduction. The speaker 30 is driven to emit loud sounds.

The decoding unit 24 cooperates with the image processing unit 13 to decode the color and encoding information in the light emitting unit of visible light communication from the series of images held in the image buffer 14 and superimpose the signal. Is demodulated.
As described above, the image processing unit 13 and the decoding unit 24 constitute a demodulation system that demodulates information from the light emitting unit.

  The memory card 25 is detachably attached to the digital camera 10. The memory card 25 is a memory for recording image data and the like serving as a recording medium of the digital camera 10, and internally includes a flash memory that is a non-volatile memory that can be electrically rewritten in units of blocks, and a controller circuit thereof. Provided.

  The indicator unit 26 is composed of a plurality of LEDs, and displays various operating states of the digital camera 10, such as power on / off, in-focus state in the optical lens unit 11, whether or not the flash unit 28 is lit.

Next, referring to FIG. 2, a circuit configuration of a wristband that is a light emitting unit will be described. In the figure, the wristband 50 is provided on the exterior so that the high-intensity LED light-emitting unit 51 is exposed as an “optical tag”.
The high-intensity LED light emitting unit 51 selectively drives each high-intensity LED of R (red), G (green), and B (blue) to emit light, and functions as an information transmission unit in a visible light communication system. To do. The details of the information transmitted by the high-intensity LED light emitting unit 51 are described in, for example, Japanese Patent Application Laid-Open No. 2003-179556, and the description thereof is omitted.

  Further, the wristband 50 includes a three-axis acceleration sensor 52. The triaxial acceleration sensor 52 detects accelerations in the triaxial directions orthogonal to each other, which are given to the wristband 50, including gravitational acceleration acting in the vertical direction.

  The high-intensity LED light emitting unit 51 and the three-axis acceleration sensor 52 are connected to the control unit 53 via the system bus SB2. The control unit 53 includes a CPU and is directly connected to the main memory 54 and the program memory 55. The main memory 54 is composed of SRAM and functions as a work memory. The program memory 55 is composed of an electrically rewritable nonvolatile memory, and fixedly stores an operation program for changing the light emission color and light emission pattern of the high-intensity LED light emitting unit 51 according to the situation.

  The control unit 53 reads out necessary programs, data, and the like from the program memory 55, and executes the control operation of the entire wristband 50 while temporarily expanding and storing it in the main memory 54 as appropriate. Further, the control unit control unit 53 executes various control operations in response to key operation signals from a key switch (SW) unit 56 including a power key and a sensitivity changeover switch.

  The sensitivity changeover switch provided in the key switch unit 56 detects a moment when an impact is applied to the wrist of the wearer of the wristband 50 in a plurality of types of sports such as “tennis”, “batter (baseball)”, and “volleyball”. It is also possible to provide the power key as well.

Next, the operation of the above embodiment will be described.
Here, a person who plays tennis is set as a subject, and the subject is wearing the wristband 50 having the configuration shown in FIG. 10 is used for imaging.

  FIG. 3 shows the operation on the wristband 50 side, which is a light emitting unit, worn by a person as a subject. As shown in the figure, the control unit 53 of the wristband 50 obtains each acceleration in the three-axis directions orthogonal to each other detected by the three-axis acceleration sensor 52 at a predetermined period, for example, 1/60 [second] ( Step T01).

  Based on the acquired three-axis acceleration information, the control unit 53 calculates the degree of impact applied to the wristband 50 using the same information acquired immediately before (step T02).

  Next, the control unit 53 determines the impact in the selected sport depending on whether or not the calculated degree of impact is larger than the threshold value corresponding to the switching state of the sensitivity switch of the key switch unit 56. In the case of tennis, it is determined whether or not it is the moment of hitting the ball with a racket (step T03).

  Here, when the calculated impact level is equal to or less than the threshold value and it is determined that it is not the moment of impact in the sport selected at that time, the control unit 53 sets the standby pattern “light” set in advance. For example, a high-brightness LED light-emitting unit 51 that is a “tag” is a blinking pattern in which a code of command information set as a standby pattern is superimposed while alternately switching colors at regular intervals between R (red) and G (green). The high-intensity LED light-emitting unit 51 is driven so as to transmit (step T05).

  Thereafter, the control unit 53 repeatedly executes the operation of returning to the processing from step T01 again.

  If it is determined in step T03 that the calculated impact level is greater than the threshold value and the moment of impact in the sport selected at that time is reached, the control unit 53 determines whether the standby pattern in the previous standby pattern has been reached. Instead of light emission, it is assumed that the high-intensity LED light emitting unit 51 that is a “light tag” emits light only with a preset impact pattern, for example, B (blue), and a command information code set as the impact pattern is superimposed. After driving the high-intensity LED light-emitting unit 51 so as to transmit with the blinking pattern (step T04), the process returns to step T01.

  FIG. 5 shows a scene where a person wearing the wristband 50 is playing tennis as a temporally continuous image. In the images (005) to (019) in the figure, the high-intensity LED light-emitting portion 51 of the wristband 50 in the image is alternately colored in R (red) and G (green), assuming that it is not the moment of impact. The state where light is emitted while switching is shown.

  On the other hand, images (020) to (021) in FIG. 5 show a state in which the high-intensity LED light emitting portion 51 of the wristband 50 in the image maintains B (blue) and emits light as the moment of impact. ing.

  Next, processing contents on the digital camera 10 side that captures the scene as described above will be described with reference to FIG.

  FIG. 4 shows the processing contents when the digital camera 10 is operated in a photographing mode called “visible light automatic photographing mode”. The processing of FIG. 4 is executed by the control unit 16 reading out the operation program stored in the program memory 18 and developing it in the main memory 17.

  At the beginning of the operation, the control unit 16 always stores in the image buffer 14 a shot image corresponding to the immediately preceding fixed capacity, for example, 2 [seconds] as the shooting time and 2 [seconds] as the number of shots (number of frames). A past shooting operation is set to be held (step S01). Thereafter, the control unit 16 performs AF (automatic focusing) processing and AE (automatic exposure) processing to set an appropriate focusing distance, aperture value, and shutter speed for the subject, and then captures and obtains an image. The stored image data is held in the image buffer 14 (step S02).

  Thereafter, the image processing unit 13 specifies the position of the high-intensity LED light emitting unit 51 portion of the wristband 50 as the “light tag” in the image data input from the image buffer 14 (step S03), and blinks at the specified position. The code of the command information superimposed by the decoding unit 24 is demodulated from the pattern (step S04).

  The control unit 16 determines whether or not the content of the command information code demodulated by the decoding unit 24 is set as an impact pattern (step S05).

  If it is determined that the code is not the command information code set as the impact pattern, the control unit 16 includes the coordinates of the optical tag that moves in the image including the image for a certain time held in the image buffer 14. Are extracted (step S06).

  As for the trace pattern to be extracted, the pattern is extracted by accumulating, for example, about 10 to 15 periods of the trace including the image held in the image buffer 14 as described above. As the weighting is increased, a change in the relative positional relationship between the subject and the digital camera 10 with the passage of time at the time of shooting is considered.

  Then, the control unit 16 updates and sets a trimming range at the time of image capturing described later based on the extracted newest trajectory pattern (step S08), and then returns to the processing from step S02 again.

  Thus, in the process of repeatedly executing the processes of steps S02 to S05, S07, and S08, the locus pattern of the coordinates of the optical tag moving in the image is extracted as needed, and a newer one is weighted, and the trimming range based on the pattern Will be updated.

  If it is determined in step S05 that the command information code demodulated by the decoding unit 24 is set as an impact pattern, the control unit 16 stores a series of data stored in the image buffer 14. Select an image held in advance for a specific time lag set in advance, for example, “0.1 [second]” from the image data, and cut out the selected image data based on the trimming range set at that time The processing is executed, and predetermined data compression is performed on the image data obtained by the processing to form a data file, which is then recorded on the memory card 25 (step S08).

  Assuming that a series of visible light communication has been completed, the process returns to step S02 to prepare for the next image.

  FIG. 6 illustrates the trimming range from the image held in the image buffer 14 executed by the control unit 16 at this time. A range of the entire image data held in the image buffer 14, that is, a range of an image formed on the CMOS image sensor 12 by the optical lens unit 11 at that time is indicated by reference numeral A1 in the drawing.

  Assuming that the trajectory TR of the optical tag constituted by the high-intensity LED light emitting unit 51 of the wristband 50 draws a pattern as indicated by an arrow in the figure, the horizontal trimming range is at least twice the left and right width W thereof. An image to be recorded by obtaining a trimming range A2 as shown in the figure from the aspect ratio of the image size set at that time so that the vertical trimming range is included at least three times the vertical width H Can be reflected.

  It should be noted that the setting environment of the vertical and horizontal trimming ranges with respect to the optical tag trajectory TR described above is not determined uniformly but can be arbitrarily variably set in advance from the menu mode or the like by the user of the digital camera 10. And

  In a method of externally controlling an imaging apparatus using a wireless system such as Bluetooth (registered trademark) or infrared of the prior art, hardware for receiving Bluetooth (registered trademark), infrared, or the like is newly added to the imaging apparatus. Although it is necessary to provide, in the external control system of the imaging device using visible light communication according to the present invention, the visible light on which information is superimposed is recognized and controlled from the outside by the imaging element originally provided in the imaging device, so the imaging device It has an excellent effect that external control is possible without adding any hardware.

  As described above in detail, according to the present embodiment, it is possible to surely capture an image at an intended moment regardless of the skill of the photographer and without wasting medium resources.

  In the above embodiment, since the trimming range of the image to be recorded is automatically set based on the range of the trajectory that the optical tag can take in the captured image, it is correct without imposing a burden on the photographer. An image with the expected composition can be acquired automatically.

  Further, in the above embodiment, the key switch unit 56 of the wristband 50 is provided with a sensitivity changeover switch, and the wristband 50 wearer's arm in a plurality of types of sports such as “tennis”, “batter (baseball)”, and “volleyball”, for example. Since the sensitivity for detecting the moment when an impact is applied can be switched, one wristband 50 can be used for photographing assistance corresponding to a plurality of types of sports.

  In addition, although the said embodiment demonstrated one Embodiment at the time of applying to the visible light communication system which consists of the light-emitting unit for sports photography, and the digital camera which is a light-receiving unit, this invention is not limited to this, For example, a digital camera Instead of 10, it can also be applied to a mobile phone terminal having a camera function, a smartphone, a tablet computer, or the like.

  As the light emitting unit, instead of the wristband 50, a ball used in golf (the moment of impact can be detected), a helmet used in a motorcycle motocross competition (the gravity state at the apex position jumping into the air can be detected) It can be applied to tools used in other sports.

  In the above-described embodiment, a color pattern in which different colors are arranged in time series is emitted. However, the present invention is not limited to this. By changing the luminance level of monochromatic light, changing the lighting time, the lighting cycle, or the like. A plurality of optical signals may be generated.

  In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention in the implementation stage. Further, the functions executed in the above-described embodiments may be combined as appropriate as possible. The above-described embodiment includes various stages, and various inventions can be extracted by an appropriate combination of a plurality of disclosed constituent elements. For example, even if some constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the effect is obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

Hereinafter, the invention described in the scope of claims of the present application will be appended.
The invention described in claim 1 is a light emitting unit that emits visible light on which arbitrary information is superimposed, and receives visible light from the light emitting unit, acquires information superimposed on the received visible light, and acquires the information. In a visible light communication system having a light receiving unit that performs an operation corresponding to information, the light emitting unit has a detection unit that detects an impact received by the light emitting unit, and a magnitude of the impact detected by the detection unit is preset. Determination means for determining whether or not the threshold value is greater than or equal to the threshold value, and transmission control means for transmitting visible light superimposed with information according to the determination result of the determination means. Imaging means for capturing the image, holding means for continuously holding a predetermined number of images captured by the imaging means, and superimposing on visible light from the images captured by the imaging means A visible light information acquisition means for demodulating and acquiring the received information, and a recording control means for controlling the recording of the image held by the holding means based on the information obtained by the visible light information acquisition means. Features.

  According to a second aspect of the present invention, in the first aspect of the invention, the recording control means controls to select and record an image held at a preset timing from images held by the holding means. It is characterized by doing.

  According to a third aspect of the present invention, in the second aspect of the invention, the light emitting unit extracts a range in which visible light on which the information is superimposed moves based on an image held by the holding unit. The image processing apparatus further includes an extracting unit, wherein the recording control unit performs trimming on the selected image based on the range extracted by the range extracting unit, and records the trimmed image.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the light emitting unit further includes a threshold variable unit that variably sets a threshold value that is a determination criterion in the determination unit. Furthermore, it is characterized by comprising.

  According to a fifth aspect of the present invention, there is provided: a detection unit that detects an impact; a determination unit that determines whether the magnitude of the impact detected by the detection unit is greater than or equal to a preset threshold value; and the determination unit. Transmission control means for transmitting visible light on which information according to the determination result is superimposed.

  According to a sixth aspect of the present invention, there is provided an imaging unit that captures an image of a subject, a holding unit that continuously holds a predetermined number of images captured by the imaging unit, and visible from among images captured by the imaging unit. Visible light information acquisition means for demodulating and acquiring information superimposed on light, and recording control means for controlling recording of images held by the holding means based on information obtained by the visible light information acquisition means It is characterized by doing.

  The invention according to claim 7 is the invention according to claim 6, wherein the recording control means controls to select and record an image held at a preset timing from images held by the holding means. It is characterized by doing.

  The invention described in claim 8 is a light emitting unit that emits visible light on which arbitrary information is superimposed, and receives visible light from the light emitting unit, acquires information superimposed on the received visible light, and acquires the information. A visible light communication method in a system including a light receiving unit that performs an operation corresponding to information, wherein the light emitting unit detects a shock received by the light emitting unit, and the shock detected in the detection step. A determination step of determining whether or not the size is greater than or equal to a preset threshold value, and a transmission control step of transmitting visible light superimposed with information according to the determination result in the determination step from the light emitting unit. An imaging process for capturing an image of a subject in the light receiving unit; a holding process for continuously maintaining a predetermined number of images captured in the imaging process; and the imaging Based on the information obtained in the visible light information acquisition step and the information obtained in the visible light information acquisition step, the image recorded in the holding step is recorded based on the information obtained by demodulating the information superimposed on the visible light from the image to be captured. And a recording control step for controlling.

  DESCRIPTION OF SYMBOLS 10 ... Digital camera, 11 ... Optical lens part, 12 ... CMOS image sensor, 13 ... Image processing part, 14 ... Image buffer, 15 ... Display part, 16 ... Control part, 17 ... Main memory, 18 ... Program memory, 19 ... Key input unit, 20 ... lens driving unit, 21 ... flash driving unit, 22 ... CMOS driving unit, 23 ... audio processing unit, 24 ... decoding unit, 25 ... memory card, 26 ... indicator unit, 27 ... lens stepping motor ( M), 28 ... Flash unit, 29 ... Microphone, 30 ... Speaker, 50 ... Wristband, 51 ... High brightness LED light emitting unit, 52 ... Triaxial acceleration sensor, 53 ... Control unit, 54 ... Main memory, 55 ... Program memory 56: Key switch part, SB1, SB2 ... System bus.

Claims (10)

A light emitting unit that emits visible light on which arbitrary information is superimposed, and the visible light from the light emitting unit are received, information superimposed on the received visible light is acquired, and an operation corresponding to the acquired information is executed. In a visible light communication system having a light receiving unit,
The light emitting unit is
Detecting means for detecting an impact received by the light emitting unit;
Determination means for determining whether or not the magnitude of impact detected by the detection means is greater than or equal to a preset threshold value;
Transmission control means for transmitting visible light superimposed with information according to the determination result in the determination means,
The light receiving unit is
Imaging means for capturing an image of a subject;
Holding means for continuously holding a predetermined number of images while being updated by the image pickup means;
Visible light information acquisition means for demodulating and acquiring information superimposed on visible light from the image captured by the imaging means;
A visible light communication system comprising: a recording control unit that controls recording of an image held by the holding unit based on information obtained by the visible light information acquiring unit.   2. The visible light communication system according to claim 1, wherein the recording control means controls to select and record an image held at a preset timing from images held by the holding means. The light receiving unit is
Based on the image held by the holding means, further comprising a range extracting means for extracting a range in which the visible light superimposed with the information moves in the image,
3. The visible light communication system according to claim 2, wherein the recording control unit performs trimming on the selected image based on the range extracted by the range extracting unit, and records the trimmed image.   The visible light communication system according to any one of claims 1 to 3, wherein the light emitting unit further includes a threshold variable unit that variably sets a threshold serving as a determination criterion in the determination unit. . A light emitting unit that emits visible light on which arbitrary information is superimposed;
An imaging unit that captures an image of a subject, a holding unit that continuously holds a predetermined number of images captured by the imaging unit, and information that is superimposed on visible light from the image captured by the imaging unit is demodulated It has a visible light information acquisition means for acquiring in, based on information obtained in the visible information acquiring unit, and a light receiving unit provided with the, and recording control means for controlling the recording of the image to be held by the holding means The light emitting unit in the visible light communication system,
The light emitting unit is
Detection means for detecting an impact;
Determination means for determining whether or not the magnitude of impact detected by the detection means is greater than or equal to a preset threshold value;
A light emitting unit comprising: transmission control means for transmitting visible light on which information according to a determination result by the determination means is superimposed. Detection means for detecting an impact, determination means for determining whether or not the magnitude of the impact detected by the detection means is greater than or equal to a preset threshold value, and information corresponding to the determination result by the determination means A light emitting unit comprising a transmission control means for transmitting superimposed visible light; and
An imaging apparatus that receives visible light from the light emitting unit, acquires information superimposed on the received visible light, and executes an operation corresponding to the acquired information; There,
The imaging device
Imaging means for capturing an image of a subject;
Holding means for continuously holding a predetermined number of images while being updated by the image pickup means;
Visible light information acquisition means for demodulating and acquiring information superimposed on visible light from the image captured by the imaging means;
An image pickup apparatus comprising: a recording control unit that controls recording of an image held by the holding unit based on information obtained by the visible light information acquisition unit.   7. The imaging apparatus according to claim 6, wherein the recording control unit performs control so that an image held at a preset timing is selected and recorded from images held by the holding unit. A light emitting unit that emits visible light on which arbitrary information is superimposed, and the visible light from the light emitting unit are received, information superimposed on the received visible light is acquired, and an operation corresponding to the acquired information is executed. A visible light communication method in a system including a light receiving unit,
In the above light emitting unit,
A detection step of detecting an impact received by the light emitting unit;
A determination step of determining whether or not the magnitude of the impact detected in the detection step is greater than or equal to a preset threshold value;
A transmission control step for transmitting visible light from the light emitting unit on which information according to the determination result in the determination step is superimposed;
In the above light receiving unit,
An imaging process for capturing an image of the subject;
A holding step for continuously holding a predetermined number of images while updating the image taken in the imaging step;
A visible light information acquisition step of demodulating and acquiring information superimposed on visible light from the image captured in the imaging step;
A visible light communication method comprising: a recording control step of controlling recording of an image held in the holding step based on information obtained in the visible light information acquisition step. Detection means for detecting an impact;
Determination means for determining whether or not the magnitude of impact detected by the detection means is greater than or equal to a preset threshold value;
Threshold value variable means for variably setting the threshold value which is a determination criterion in the determination means;
A light emitting unit comprising: transmission control means for transmitting visible light on which information according to a determination result by the determination means is superimposed. Imaging means for capturing an image of a subject;
Holding means for continuously holding a predetermined number of images while being updated by the image pickup means;
Visible light information acquisition means for demodulating and acquiring information superimposed on visible light from the image captured by the imaging means;
Based on the image held by the holding means, a range extracting means for extracting a range in which the visible light superimposed with the information moves in the image;
An image pickup apparatus comprising: a recording control unit configured to perform trimming on a selected image based on the range extracted by the range extracting unit and record the trimmed image.

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