JP7176208B2 - System and imager - Google Patents

Description

Embodiments of the present invention relate to systems and imaging devices.

Techniques for reading information from bar codes and two-dimensional codes, which are still images, are conventionally known. A technique using a three-dimensional code is also disclosed in order to transmit more information than the two-dimensional code.

JP 2009-163720 A JP 2016-091390 A JP 2016-110323 A

However, in the conventional two-dimensional code technology, the larger the amount of information contained in the code, the more complicated the shape of the code. Also, even with a three-dimensional code, there is a limit to the amount of information that can be increased compared to a two-dimensional code. Therefore, there is a need to generate and read codes that can convey a lot of information.

A system according to an embodiment of the present invention includes, as an example, an electronic device and an imaging device. The electronic device includes a display that displays images that change at time intervals of variable length. The imaging device includes an imaging unit that captures an image, and a recording unit that, when the captured image captured by the imaging unit changes, records the captured image and the time interval between changes in the captured image. Therefore, according to the system of the embodiment, it is possible to generate and read codes capable of transmitting a large amount of information.

In the above system, as an example, the recording unit detects changes in the captured image for each pixel included in the captured image, records information about pixels that have changed, and does not record information about pixels that have not changed. Therefore, according to the system of the embodiment, the amount of information to be acquired can be reduced and the processing load can be reduced as compared with recording the information of the pixels of the entire captured image.

In the above system, as an example, the display unit displays an image in which the luminance of each pixel is represented by three or more levels of luminance. In addition, the recording unit records the captured image and the time interval between the changes in the captured image when the brightness of the pixels included in the captured image changes. Therefore, according to the system of the embodiment, it is possible to generate and read a code capable of transmitting more information by including a multi-level image in which the brightness level is expressed in multiple levels.

An imaging device according to an embodiment of the present invention includes, for example, an imaging unit that generates a captured image, a recording unit that records the captured image and the time interval between changes in the captured image when the captured image changes, a recognition unit that recognizes information indicated by a combination of a plurality of captured images and time intervals; Therefore, according to the imaging apparatus of the embodiment, information can be obtained from the recorded plural captured images and the time interval.

In the imaging device described above, as an example, when the imaging device is installed on a moving body and the captured image changes due to movement between the moving body and the imaging device, the recording unit stores the captured image and the time of change of the captured image. Record the intervals. Therefore, according to the imaging apparatus of the embodiment, information can be obtained from the captured image of the surroundings of the moving object and the time interval between changes in the captured image.

FIG. 1 is a diagram showing an example of a three-dimensional code system according to the first embodiment. FIG. 2 is a diagram illustrating an example of recording timing of a captured image of the imaging apparatus according to the first embodiment; FIG. 3 is a diagram illustrating an example of functions of the three-dimensional code system according to the first embodiment; FIG. 4 is a flowchart illustrating an example of the flow of three-dimensional code reading processing by the imaging device according to the first embodiment. FIG. 5 is a diagram illustrating an example of a code information database according to the first embodiment; FIG. 6 is a diagram showing an example of image change according to the modification. FIG. 7 is a diagram illustrating an example of an imaging target of an imaging device according to a second embodiment; FIG. 8 is a diagram illustrating an example of a captured image according to the second embodiment; FIG. 9 is a diagram illustrating an example of an imaging target of an imaging device according to a third embodiment; FIG. 10 is a diagram illustrating an example of a captured image according to the third embodiment;

(First embodiment)
FIG. 1(a) is a diagram showing an example of a three-dimensional code system 10 according to the first embodiment. A three-dimensional code system 10 of this embodiment includes an electronic device 2 and an imaging device 1 .

The electronic device 2 displays images 31a to 31d (hereinafter referred to as When the images 31a to 31d are not distinguished, an image 31) is displayed. In the example shown in FIG. 1(a), the image 31a is displayed on the display 22 first, and the image 31a changes to the image 31b after the elapse of the time interval t1. After that, the image 31c and the image 31d are displayed in chronological order as the time intervals t2 and t3 elapse.

The three-dimensional code 3 of this embodiment is images 31a to 31d that change at variable length time intervals t1 to t3. More specifically, the three-dimensional code 3 is a combination of multiple images 31 and a variable length time interval t. Each of the images 31a to 31d is a two-dimensional still image. More specifically, the three-dimensional code 3 is a further combination of a combination of multiple images 31 and a combination of multiple time intervals t.

The time intervals t1 to t3 are the third dimension in the three-dimensional code 3 of this embodiment. The three-dimensional code 3 of this embodiment is also called a time-modulated two-dimensional code because it combines a plurality of images 31 with a variable-length time interval t. Also, the image 31 of the present embodiment is assumed to be a binary image drawn in two colors (two gradations) of white and black. The images 31a to 31d shown in FIG. 1(a) are different images, and the time intervals t1 to t3 are assumed to have different lengths. The three-dimensional code 3 is also called a signal, and the electronic device 2 is also called a signal source.

It is assumed that the imaging device 1 is installed at a position and angle that allows the image 31 displayed on the display 22 to be captured. The imaging device 1 captures the image 31 and records the captured image when the captured image obtained by capturing the image 31 changes. Since the imaging apparatus 1 records the captured image when the captured image obtained by capturing the image 31 changes, the changes in the image 31 can be recorded in chronological order even if the time interval t between changes in the image 31 is not constant. can. Further, in the present embodiment, capturing means forming a captured image of a subject (image 31), and does not include recording the captured image.

As a comparative example with respect to FIG. 1(a), FIG. 1(b) shows an imaging device 90 that records captured images at fixed-length time intervals tx. Since the imaging device 90 records an image at each time interval tx, it may not be possible to record the image 31 displayed between the recording timings. In the example of FIG. 1(b), the image 31c is omitted from the recording of the imaging device 90. In the example of FIG.

The recording timing of the imaging device 1 will be further described with reference to FIG. 2(a). FIG. 2A is a diagram showing an example of recording timing of the captured image 131 of the imaging device 1 according to this embodiment. In the example shown in FIG. 2A, the imaging device 1 captures an image of an LED light bulb 20 blinking in a variable-length cycle. The imaging device 1 records a captured image 131 of the LED light bulb 20 when the LED light bulb 20 changes, that is, when the LED light bulb 20 is turned on or off. Therefore, the period 41 of the recording timing of the imaging device 1 matches the light emission pulse 201 indicating the flickering period of the LED light bulb 20 . Therefore, the imaging device 1 can record changes in the LED light bulb 20 to be imaged in chronological order.

As a comparative example with respect to FIG. 2(a), FIG. 2(b) shows a recording timing cycle 42 of the imaging device 90 that records the captured image 131 at fixed-length time intervals tx. The imaging device 90 records a captured image 131 at fixed-length time intervals tx regardless of the light emission pulse 201 of the LED bulb 20 . If the time interval tx is longer than the flickering interval of the LED bulb 20, the imaging device 90 cannot record changes in the LED bulb 20 in chronological order. Also, if the time interval tx is shorter than the flickering interval of the LED light bulb 20, the imaging device 90 will record the same captured image 131 in duplicate regardless of the change history. In either case, it is difficult for the imaging device 90 to specify the time interval t between changes in the captured image 131 .

Returning to the description of FIG. More specifically, the imaging apparatus 1 detects, pixel by pixel, changes in a captured image 131 obtained by capturing the image 31, records information about pixels that have changed, and does not record information about pixels that have not changed. The pixel information is, for example, luminance information and color information. The imaging apparatus 1 records the entire captured image 131 of the first displayed image 31a because all the pixels have changed. After that, every time the image 31 changes, the imaging device 1 records the information of the pixel of the captured image 131 corresponding to the changed portion. For example, in the image 31b, the part of the figure 5a has changed compared to the image 31a before the change. In this case, the imaging device 1 records only the pixel information corresponding to the figure 5a, which is the difference between the image 31a before the change and the image 31b after the change, and does not record the information of the other pixels. The imaging device 1 can generate the entire image 31b after the change by replacing the pixels corresponding to the figure 5a from the image 31a before the change. In addition, the imaging device 1 also records only the information of the pixels corresponding to the figures 5b to 5d, which are changed portions, for the image 31c and the image 31d to be displayed next.

Next, the details of the functions of the electronic device 2 and the imaging device 1 included in the three-dimensional code system 10 of this embodiment will be described. FIG. 3 is a diagram showing an example of functions of the three-dimensional code system 10 according to this embodiment.

The electronic device 2 includes a control section 21 , a display section (display) 22 and a storage section 23 . The storage unit 23 stores in advance a combination of the image 31 and the time interval t. The storage unit 23 is, for example, an HDD. The display unit 22 displays the three-dimensional code 3, which is an image 31 that changes at a variable-length time interval t. The control unit 21 controls the display unit 22 to display the image 31 stored in the display unit 22, and changes the image 31 at a variable length time interval t.

Further, the electronic device 2 includes, for example, a control device such as a CPU (Central Processing Unit), a storage device such as a ROM and a RAM, and an external storage device such as an HDD and a CD drive device. The hardware configuration used.

The imaging device 1 includes an imaging unit 11 , a recording unit 12 , a recognition unit 13 and a storage unit 14 .

The imaging unit 11 captures the image 31 and generates a captured image 131 .

The recording unit 12 detects changes in the captured image 131 captured by the imaging unit 11, and records the captured image 131 and the time interval t between changes in the captured image 131 when the captured image 131 changes. More specifically, the recording unit 12 detects changes in the captured image 131 for each pixel included in the captured image, and records information about the changed pixels in the storage unit 14 . Also, the recording unit 12 does not record information on pixels that have not changed. Information about the changed pixel is information about the pixel after the change. The recording unit 12 is, for example, an image sensor. The function of recording the captured image 131 at variable-length imaging timings like the imaging apparatus 1 of this embodiment is also called an asynchronous shutter function. The imaging device 1 is also referred to as a camera including an image sensor having an asynchronous shutter function.

Further, in the present embodiment, the recording unit 12 replaces changed pixels in the captured image 131 before change to generate the captured image 131 after change, and then records the captured image 131 in the storage unit 14 . do. Note that the recording unit 12 may record the history of changed pixels in the storage unit 14 without generating the captured image 131 after the change.

The storage unit 14 associates and stores the captured image 131 and the time interval t. The storage unit 14 also stores a code information database 141 . A code information database (DB) 141 is a database in which combinations of a plurality of images 31 included in the three-dimensional code 3 and variable-length time intervals t are registered in association with information indicated by the three-dimensional code 3. be. The storage unit 14 is, for example, a flash memory or the like.

The recognition unit 13 recognizes information indicated by a combination of the plurality of captured images 131 captured by the imaging unit 11 and the time interval t between changes in the captured images 131 . Recognition in this embodiment means specifying information indicated by the three-dimensional code 3 . More specifically, the recognition unit 13 searches the code information database 141 by combining a plurality of captured images 131 obtained by capturing the plurality of images 31 and a time interval t between changes in the captured images 131 . From the code information database 141, the recognition unit 13 acquires information associated with the combination of the plurality of specified captured images 131 and the time interval t.

Next, the flow of reading processing of the three-dimensional code 3 in the three-dimensional code system 10 of this embodiment configured as described above will be described. FIG. 4 is a flow chart showing an example of the flow of reading processing of the three-dimensional code 3 by the imaging device 1 according to this embodiment.

The imaging unit 11 starts imaging an image 31 displayed on the display 22 of the electronic device 2, for example, when the user performs an operation to start imaging (S1). Then, the recording unit 12 determines whether or not there is a change in the captured image 131 obtained by capturing the image 31 for each pixel included in the captured image 131 (S2). At this point, the imaging unit 11 forms a captured image 131 of the image 31 but does not record the captured image 131 .

If there is a change in the captured image 131 (“Yes” in S2), the recording unit 12 records information on the changed pixel among the pixels included in the captured image 131 in the storage unit 14 (S3). Also, in this case, the recording unit 12 records the time interval t from the previous change to the current change in the storage unit 14 (S4). If this change is the first time, the recording unit 12 does not need to record the time interval t.

Next, the recording unit 12 determines whether or not the reading of the three-dimensional code 3 (code) is completed (S5). The criteria for determining the completion of reading the three-dimensional code 3 are not particularly limited. For example, the recording unit 12 determines that the reading of the three-dimensional code 3 is completed when a predetermined time has passed since the image 31 was first displayed, or when the image 31 has changed more than a predetermined number of times. Alternatively, a predetermined image 31 may be used as a signal indicating the end of reading.

When the recording unit 12 determines that the reading of the three-dimensional code 3 has not been completed (S5 "No"), the processing of S2 to S5 is repeated.

When the recording unit 12 determines that the reading of the three-dimensional code 3 is finished (S5 "Yes"), the recognition unit 13 recognizes the information indicated by the three-dimensional code 3 (code) (S6). Specifically, the recognizing unit 13 searches the code information database 141 by combining the plurality of captured images 131 recorded by the recording unit 12 and the time interval t.

FIG. 5 is a diagram showing an example of the code information database 141 according to this embodiment. In the code information database 141, information indicated by the three-dimensional code 3 is associated with each set of a combination of a plurality of images 31 included in the three-dimensional code 3 and a combination of the length of the time interval t. is registered. For example, if the images 31a to 31d are "image A1, image B1, image C1, image D1" respectively, and the time intervals t1 to t3 are "t1=n seconds, t2=n1 seconds, t3=n2 seconds" respectively, then the recognition The unit 13 recognizes that the three-dimensional code 3 indicates information "X1". Since there are combinations for each of the plurality of images 31 and time intervals t, the three-dimensional code 3 can convey more information than the conventional two-dimensional code. For example, in the example shown in FIG. 5, even if the combination of the images 31a to 31d of the multiple three-dimensional codes 3 is the same, if the combinations of the lengths of the time intervals t1 to t3 are different, the multiple three-dimensional codes 3 indicates different information.

When the recognition unit 13 recognizes the information indicated by the three-dimensional code 3, the processing of this flowchart ends.

As described above, the three-dimensional code system 10 of the present embodiment provides the electronic device 2 that displays the image 31 that changes at a variable-length time interval t, and the captured image 131 that captures the image 31 when the captured image 131 changes. 131 and an imaging device 1 that records the time interval of changes in the captured image 131 . According to this configuration, the three-dimensional code system 10 of the present embodiment not only combines a plurality of images 31, but also combines a plurality of lengths of time intervals t to generate a three-dimensional code containing more information. can be generated. Therefore, according to the three-dimensional code system 10 of this embodiment, it is possible to generate and read the three-dimensional code 3 capable of transmitting a large amount of information.

In addition, since the three-dimensional code 3 changes at a variable length time interval t, it is difficult for the image capturing device 90 that captures images at fixed length time intervals tx to record changes in the image 31 in chronological order. . According to the three-dimensional code system 10 of the present embodiment, when the captured image 131 obtained by capturing the image 31 changes, the imaging device 1 records the captured image 131 and the time interval between changes in the captured image 131. Time-modulated images 31 can be recorded in time series. Also, with this configuration, the three-dimensional code system 10 of the present embodiment can prevent the three-dimensional code 3 from being easily read by an imaging device other than the imaging device 1 .

Furthermore, the imaging device 1 of the three-dimensional code system 10 of the present embodiment detects changes in the captured image 131 for each pixel included in the captured image 131, records information about the changed pixels, and information is not recorded. Therefore, according to the three-dimensional code system 10 of the present embodiment, it is possible to reduce the amount of information to be acquired and the processing load as compared with recording the information of the pixels of the entire captured image 131 .

In addition, since the imaging apparatus 1 of the present embodiment recognizes information indicated by a combination of the plurality of captured images 131 and the change time interval t, the information can be obtained from the three-dimensional code 3 .

Note that the number of images 31 included in the three-dimensional code 3 and the length of the time interval t shown in FIGS. 1, 5, etc. of the present embodiment are examples, and are not limited to these. Also, the configuration of the code information database 141 shown in FIG. 5 is merely an example, and the method of specifying information indicated by the three-dimensional code 3 is not limited to this. Further, the processing of recognizing information indicated by the three-dimensional code 3 may be performed by another information processing device instead of the imaging device 1 . Also, the configuration of the electronic device 2 is not limited to the above-described example, and for example, the display unit (display) 22 alone may be used as the electronic device 2 .

Further, in the present embodiment, when the captured image 131 changes, the recording unit 12 records the changed captured image 131 and the time interval t. , the captured image 131 before change and the time interval t may be recorded.

(Modification 1)
In the first embodiment, the image 31 included in the three-dimensional code 3 was a binary image represented by white and black. It may be a multivalued image represented by .

FIG. 6 is a diagram showing an example of changes in the image 31 according to this modified example. Images 31e to 31g of this modified example are images in which the luminance of each pixel is represented by three or more levels of luminance. For example, image 31e includes gray graphics 5e and 5f as well as white and black. The brightness levels of the figures 5e and 5f are intermediate levels between the brightness of the white portion and the brightness of the black portion of the image 31e.

Also, in this modification, the change in the image 31 includes a change in brightness. For example, a figure 5e included in the image 31e changes to a figure 5g whose luminance is lower than that of the figure 5e in the image 31f after the time interval t1 has elapsed. The recording unit 12 of the imaging device 1 of this modified example records the captured image 131 and the time interval of the change of the captured image 131 when the brightness of the pixels included in the captured image 131 obtained by capturing the image 31 changes. do.

Note that the image 31 included in the three-dimensional code 3 may be a color image having a plurality of hues as well as having multiple levels of luminance. Also in this case, the recording unit 12 of the imaging device 1 detects a change in color of the image 31 and records the information of the changed pixel.

As described above, the electronic device 2 of the three-dimensional code system 10 of the present modification displays the image 31 in which the brightness of each pixel is represented by three or more levels of brightness, and the imaging device 1 captures the image 31. When the brightness of the pixels included in the image 131 changes, the captured image 131 and the time interval of change of the captured image 131 are recorded. According to the three-dimensional code system 10 of this modified example, variations in the image 31 can be increased by changing the brightness level, and a three-dimensional code system capable of transmitting more information than a black-and-white binary image is used. Code 3 can be generated and read.

(Modification 2)
In the first embodiment, the imaging device 1 records only the information of changed pixels, but the imaging device 1 may record not only the changed pixels but also the entire captured image 131 .

(Second embodiment)
In the first embodiment, the imaging device 1 is fixed and the image 31 displayed on the display 22 is changed. In the second embodiment, the imaging device 1 acquires information from a combination of the captured image 131 that changes as the imaging device 1 moves and the time interval t between changes in the captured image 131 .

FIG. 7 is a diagram showing an example of an imaging target of the imaging apparatus 1 according to this embodiment. The imaging device 1 of this embodiment is installed in a vehicle (automobile) 6 . The imaging device 1 is installed, for example, in the rear part of the vehicle 6 facing obliquely downward, and images the road 7 and the pattern on the road 7 (for example, the white line 71). The vehicle 6 is an example of a moving body in this embodiment. The road 7 and the white line 71 are an example of an imaging target of the imaging device 1, and are not limited to this.

FIG. 8 is a diagram showing an example of the captured image 131 according to this embodiment. A captured image 131 is an image captured by the imaging device 1 . In this embodiment, even if the road 7 and the white line 71 themselves do not change, the captured image 131 changes as the imaging device 1 moves as the vehicle 6 travels. In addition, since the moving speed of the imaging device 1 changes according to the vehicle speed of the vehicle 6 , the captured image 131 changes at a variable length time interval t according to the vehicle speed of the vehicle 6 . In this embodiment, the three-dimensional code 3 is a combination of a plurality of captured images 131 captured by the imaging device 1 and a time interval t between changes in the captured images 131 .

The configuration of the imaging apparatus 1 of this embodiment is the same as the configuration of the first embodiment described with reference to FIG.

The storage unit 14 of the imaging apparatus 1 of this embodiment has the same functions as those of the first embodiment, and stores a code information database 141 . Further, in the code information database 141 of this embodiment, for each set further combining a combination of a plurality of images (captured images 131) included in the three-dimensional code 3 and a combination of the length of the time interval t, Information indicated by the three-dimensional code 3 is associated and registered. The information indicated by the three-dimensional code 3 of the present embodiment is, for example, the vehicle speed of the vehicle 6, but may be information about the surrounding road environment.

Further, the imaging unit 11 of this embodiment has the same functions as those of the first embodiment. Further, the imaging unit 11 of the present embodiment images the road 7 and the white line 71 obliquely downward in front of the vehicle 6 while the vehicle 6 is running.

Also, the recording unit 12 of the present embodiment has the same functions as those of the first embodiment. More specifically, in this embodiment, since the imaging device 1 moves, the recording unit 12 stores the captured image 131 and the imaged The time interval t of the change of image 131 is recorded.

Further, the recognition unit 13 of the present embodiment has the functions of the first embodiment, and recognizes the three-dimensional code 3 based on the plurality of captured images 131 and the time interval t between changes in the captured images 131 . recognizes the information indicated by More specifically, the recognizing unit 13 searches the code information database 141 for the plurality of captured images 131 recorded by the recording unit 12 and the plurality of time intervals t, and associates the code information database 141 with the combinations of the captured images 131 and the time intervals t. The vehicle speed of the vehicle 6 is obtained.

The recognition unit 13 may output the acquired vehicle speed to a display device installed in the vehicle 6 or other external device. By recognizing the vehicle speed of the vehicle 6 indicated by the three-dimensional code 3 by the recognition unit 13, for example, when the vehicle speed of the vehicle 6 exceeds the legal speed, the system of the vehicle 6 issues a warning to the driver. can be done.

According to the imaging device 1 of the present embodiment, when the captured image 131 changes due to the movement between the vehicle 6 and the imaging device 1, the captured image 131 and the time interval t between the changes of the captured image 131 are recorded. , information can be acquired from the result of imaging the surroundings of the vehicle 6 without using a dedicated device for displaying the three-dimensional code 3 . For example, according to the imaging device 1 of the present embodiment, information can be acquired even from roads 7 and white lines 71 that are difficult to move as shown in FIGS.

(Third embodiment)
In the third embodiment, the source (signal source) of the three-dimensional code 3 is an LED lighting installed as a streetlight or traffic light.

FIG. 9 is a diagram showing an example of an imaging target of the imaging apparatus 1 according to this embodiment. The imaging device 1 of the present embodiment is installed in the vehicle 6 at a position and angle capable of imaging streetlights and traffic lights around the vehicle 6 . As an example, in this embodiment, the imaging device 1 is installed facing the front of the vehicle 6 . The imaging device 1 captures an image of streetlights 8a to 8d using LED lighting located in front of a vehicle 6 (hereinafter referred to as a streetlight 8 when the streetlights 8a to 8d are not particularly distinguished). In this embodiment, the vehicle 6 may be running or may be stopped. The street lamp 8 and the traffic signal are examples of the electronic equipment in this embodiment.

FIG. 10 is a diagram showing an example of a captured image 131 according to this embodiment. Areas 81a to 81f with high brightness included in the captured image 131 are LED illumination of the street lamp 8 in the lighting state.

Since the LED lighting repeats turning on and off, the captured image 131 changes at each time interval t between turning on and off of the LED lighting even when the vehicle 6 is stopped. Further, when the vehicle 6 is running, the captured image 131 changes due to both blinking of the LED lighting and movement of the imaging device 1 installed in the vehicle 6 . Since there are few obstructions between the vehicle 6 and the street lamp 8 or traffic light on the road, the imaging device 1 can acquire the captured image 131 and the time interval t with high accuracy. In the present embodiment, the three-dimensional code 3 includes a plurality of captured images 131 captured by the imaging device 1 of the street lamp 8 and the time interval t between changes in the captured images 131 .

The configuration of the imaging apparatus 1 of this embodiment is the same as the configuration of the first embodiment described with reference to FIG. The imaging unit 11, the recording unit 12, and the storage unit 14 of the imaging apparatus 1 of this embodiment have the same functions as those of the first embodiment.

In the code information database 141 of the present embodiment, as information indicated by the three-dimensional code 3, for example, position information indicating the position where the streetlight 8 is installed is registered. Information indicated by the three-dimensional code 3 may be traffic information or the like. Further, different code information databases 141 may be registered in advance in the storage unit 14 depending on whether the vehicle 6 is stopped or running.

The recognizing unit 13 of the present embodiment has the functions of the first embodiment, and searches the code information database 141 using a plurality of captured images 131 and a time interval t between changes in the captured images 131 to obtain a plurality of Position information associated with the captured image 131 and the time interval t is recognized as information indicated by the three-dimensional code 3 .

According to the imaging device 1 of the present embodiment, the streetlights 8, traffic lights, etc. can be used as the sources of the three-dimensional code 3. Therefore, in addition to the effects of the first embodiment, Information can be obtained from lighting devices such as traffic lights.

In addition, in the configuration of the present embodiment, only the imaging device 1 within the reach of the light from the streetlight 8 or traffic signal can recognize information, so the destination of information transmission can be limited and information can be transmitted to a predetermined area. becomes. For example, the street lights 8 and traffic lights of the present embodiment can provide necessary position information, traffic information, and the like to vehicles 6 passing nearby.

Although the embodiments of the present invention have been exemplified above, the above embodiments and modifications are merely examples, and are not intended to limit the scope of the invention. The above embodiments and modifications can be implemented in various other forms, and various omissions, replacements, combinations, and modifications can be made without departing from the scope of the invention. Also, the configuration and shape of each embodiment and each modification can be partially exchanged.

DESCRIPTION OF SYMBOLS 1... Imaging device, 2... Electronic equipment, 3... Three-dimensional code, 6... Vehicle, 7... Road, 8, 8a-8d... Street lamp, 10... Three-dimensional code system, 11... Imaging unit, 12... Recording unit, 13 Recognition unit 14 Storage unit 20 LED light bulb 21 Control unit 22 Display (display unit) 23 Storage unit 31, 31a to 31g Image 131 Captured image 141 Code information database , t, t1-t3 . . . time intervals.

Claims (4)

A system comprising an electronic device and an imaging device,
The electronic device
a display unit that displays images that change at time intervals of variable length;
The imaging device is
an imaging unit that captures the image;
a recording unit that records the captured image and a time interval of change of the captured image when the captured image captured by the imaging unit changes;
a code information database in which three-dimensional code information is associated with each set obtained by further combining a combination of a plurality of images and a combination of lengths of time intervals;
a recognition unit that refers to the code information database and recognizes three-dimensional code information indicated by a combination of the plurality of captured images and the time interval;
with
The recording unit detects changes in the captured image for each pixel included in the captured image, records information about the pixels that have changed, and does not record information about the pixels that have not changed.
system. The display unit displays the image in which the brightness of each pixel is represented by three or more levels of brightness,
The recording unit records the captured image and a time interval between changes in the captured image when the brightness of the pixels included in the captured image obtained by capturing the image changes.
The system of claim 1 . an imaging unit that generates a captured image;
a recording unit that records the captured image and a time interval between changes in the captured image when the captured image changes;
a code information database in which three-dimensional code information is associated with each set obtained by further combining a combination of a plurality of images and a combination of lengths of time intervals;
a recognition unit that refers to the code information database and recognizes three-dimensional code information indicated by a combination of the plurality of captured images and the time interval;
The recording unit detects changes in the captured image for each pixel included in the captured image, records information about the pixels that have changed, and does not record information about the pixels that have not changed.
Imaging device. The imaging device is installed on a mobile body,
The recording unit records the captured image and a time interval between changes in the captured image when the captured image changes due to the movement of the moving body and the imaging device.
The imaging device according to claim 3 .

Images