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WO2018167870A1 - Dispositif, système, et procédé de détection d'image - Google Patents

Dispositif, système, et procédé de détection d'image Download PDF

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Publication number
WO2018167870A1
WO2018167870A1 PCT/JP2017/010382 JP2017010382W WO2018167870A1 WO 2018167870 A1 WO2018167870 A1 WO 2018167870A1 JP 2017010382 W JP2017010382 W JP 2017010382W WO 2018167870 A1 WO2018167870 A1 WO 2018167870A1
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WO
WIPO (PCT)
Prior art keywords
image
video
unit
dimensional code
display
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Application number
PCT/JP2017/010382
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English (en)
Japanese (ja)
Inventor
一暁 坂元
Original Assignee
Ｎｅｃディスプレイソリューションズ株式会社
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Application filed by Ｎｅｃディスプレイソリューションズ株式会社 filed Critical Ｎｅｃディスプレイソリューションズ株式会社
Priority to PCT/JP2017/010382 priority Critical patent/WO2018167870A1/fr
Publication of WO2018167870A1 publication Critical patent/WO2018167870A1/fr

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light

Definitions

  • the present invention relates to an image detection device, an image detection system, and an image detection method.
  • Patent Document 1 discloses a technique in which a two-dimensional code is displayed on a video display device, the two-dimensional code is photographed with a camera, and recording is set.
  • Patent Document 2 discloses a device that controls display of a plurality of projectors using a two-dimensional code. If the network connection information is included in the two-dimensional code, the camera of the terminal device can be connected to the network by photographing the two-dimensional code image displayed on the video display device.
  • Patent Document 3 discloses a technique for connecting to a network from information captured by a camera.
  • the present invention provides an image detection apparatus, an image detection system, and an image detection method capable of suppressing deterioration of a display video and detecting an image displayed superimposed on the display video.
  • the purpose is to do.
  • an image detection device includes an imaging unit that captures a superimposed image in which a first image and a second image are superimposed, and a captured image captured by the imaging unit. And a detection unit that detects at least one of the first image and the second image.
  • An image detection method includes a step of capturing a superimposed image in which a first image and a second image are superimposed, and the first image and the image based on the captured image Detecting at least one of the second image and the second image.
  • the present invention it is possible to suppress the deterioration of the display image and to detect the image displayed so as to overlap the display image.
  • 1 is a schematic diagram of an image detection system according to a first embodiment of the present invention.
  • 1 is a block diagram illustrating a configuration of a video display device according to a first embodiment of the present invention. It is a flowchart which shows a process when a display video image and a two-dimensional code image are superimposed in the video display apparatus 10 which concerns on the 1st Embodiment of this invention. It is a schematic block diagram which shows the structure of the terminal device which concerns on the 1st Embodiment of this invention. It is a flowchart which shows the process which decompress
  • FIG. 1 is a schematic diagram of an image detection system 1 according to the first embodiment of the present invention.
  • the image detection system 1 according to the first embodiment of the present invention includes a video display device 10 and a terminal device 50 (an example of an “image detection device”).
  • the video display device 10 reproduces broadcast programs such as terrestrial digital broadcast and satellite digital broadcast, and various contents distributed via the Internet.
  • a display video image (an example of a “first image”) 100 of a broadcast program or content is displayed on the video display unit 20 of the video display device 10.
  • a two-dimensional code image (an example of “second image”) 101 is superimposed on the display video image 100.
  • a QR code registered trademark
  • the two-dimensional code image 101 is shown in a viewable state, but in reality, the display level of the two-dimensional code image 101 is set to the display level of the display video image 100.
  • the two-dimensional code image 101 is almost visually invisible.
  • the display level is the degree of brightness (brightness) when displaying an image.
  • the display level is divided into levels 1 to 10.
  • the display image is a black and white image
  • the display video image 100 has these 10 gradation colors (level 1 brightness white, level 2 brightness gray closest to white, then level 3 brightness gray closest to white,... , Gray of level 9 brightness closest to black, black of level 10 brightness).
  • the two-dimensional code image 101 is displayed with two gradations of a predetermined luminance (for example, white) and a luminance closest to the luminance (for example, gray of level 2 luminance closest to white). Therefore, as the number of display levels (luminance) increases, the two-dimensional code image 101 becomes almost invisible.
  • luminance is used as the “display level”.
  • the present invention is not limited to this, and the “display level” may be, for example, a color density.
  • the two-dimensional code image 101 may be superimposed on all the images corresponding to red, green, and blue in the display video (in this case, the two-dimensional code image 101 is displayed in white), or red, green And may be superimposed on an image corresponding to a predetermined color which is one of blue (in this case, the two-dimensional code image 101 is displayed in the predetermined color).
  • the two-dimensional code image 101 is an image inverted at a predetermined time interval (an example of “second time interval”). In this example, the image is inverted between an odd frame and an even frame.
  • the two-dimensional code image 101 includes, for example, network connection information.
  • the information of the two-dimensional code image 101 is not limited to network information, and may be any information.
  • the terminal device 50 is a terminal owned by the user.
  • the terminal device 50 is, for example, a mobile phone, a PDA (Personal Digital Assistant or Personal Data Assistant), a PC (Personal Computer), or the like.
  • the terminal device 50 includes a camera unit 58 (an example of an “imaging unit”).
  • the user images the display screen of the video display unit 20 of the video display device 10 using the camera unit 58 of the terminal device 50.
  • the camera unit 58 of the terminal device 50 images the display screen of the video display unit 20 continuously at a predetermined time interval (an example of “first time interval”) a plurality of times.
  • the terminal device 50 When the terminal device 50 images the display screen of the video display unit 20, the terminal device 50 takes the difference value of the captured images, integrates the video difference values between the captured images, and restores the two-dimensional code image 101.
  • a two-dimensional code image 101 is superimposed and displayed on a display video image 100 of a broadcast program or content.
  • the display video image 100 has a correlation, and the level of the display video image 100 captured continuously is almost the same. Therefore, if the display video image 100 is captured by the camera unit 58 of the terminal device 50 and the video difference between the captured images is taken, the display video image 100 is cancelled.
  • the two-dimensional code image 101 is inverted between the odd frame and the even frame. For this reason, when the video difference between captured images is taken, the components of the two-dimensional code image 101 are added. Although the video level of the two-dimensional code image 101 is small, the video level of the two-dimensional code image 101 can be increased by integrating the video differences between the captured images. Thereby, the two-dimensional code image 101 can be restored from the captured image of the display screen of the video display unit 20 by the camera unit 58.
  • FIG. 2 is a block diagram showing the configuration of the video display apparatus 10 according to the present embodiment.
  • the video display device 10 includes a control unit 11, an operation unit 12, an operation detection unit 13, a video input unit 14, an input video processing unit 15, a data reception unit 16, a received video decoding unit 17, a two-dimensional display.
  • a code image generation unit 18, a video composition unit 19, and a video display unit 20 are provided.
  • the control unit 11 includes a CPU (Central Processing Unit) and the like, and controls the entire operation of the video display device 10.
  • the operation unit 12 includes operation buttons and operation keys, and the user performs various input operations.
  • the operation detection unit 13 detects an operation input from the operation unit 12 and outputs the operation input to the control unit 11.
  • the operation unit 12 may be an operation button or an operation key provided in the video display device 10 or may be physically separated from the video display device 10 such as an infrared remote controller. When the operation unit 12 is physically separated from the video display device 10, the user performs various input operations by remote control.
  • the video input unit 14 receives video signals such as terrestrial digital broadcasting and satellite digital broadcasting. Further, a video signal from a video output device (not shown) (for example, a video player or a PC) may be input to the video input unit 14. The video signal input from the video input unit 14 is sent to the input video processing unit 15.
  • a video output device for example, a video player or a PC
  • the input video processing unit 15 performs an image quality adjustment process on the video signal input from the video input unit 14.
  • the video signal from the input video processing unit 15 is output to the video synthesis unit 19.
  • the data receiving unit 16 performs data communication by LAN (Local Area Network) or wireless LAN, and receives data of various contents distributed via the Internet.
  • the data received by the data receiving unit 16 is sent to the received video decoding unit 17.
  • the received video decoding unit 17 decodes the received data and outputs a video signal.
  • the video signal from the received video decoding unit 17 is sent to the video synthesis unit 19.
  • the two-dimensional code image generation unit 18 generates a two-dimensional code image based on an instruction from the control unit 11.
  • a QR code registered trademark
  • the video composition unit 19 superimposes the two-dimensional code image from the two-dimensional code image generation unit 18 on the display video image from the input video processing unit 15 or the received video decoding unit 17. At this time, in this embodiment, the video composition unit 19 performs a process of inverting the two-dimensional code image between the odd-numbered frame and the even-numbered frame. In the present embodiment, the video composition unit 19 combines the two-dimensional code image and the display video image by reducing the video level of the two-dimensional code image relative to the video level of the display video image. For example, if the video level of an image that can be displayed on the video display unit 20 is “0” to “10”, the video level of the display video image is “0” to “9”, and the video level of the two-dimensional code image is “0”. To "1".
  • the video display unit 20 displays the video output from the video synthesis unit 19 as a screen.
  • a liquid crystal display is used as the video display unit 20.
  • a display video image 100 on which the two-dimensional code image 101 is superimposed is displayed on the video display unit 20.
  • FIG. 3 is a flowchart showing processing when the display video image and the two-dimensional code image are superimposed in the video display device 10 according to the first embodiment of the present invention.
  • Step S101 The video composition unit 19 of the video display apparatus 10 inputs the display video image from the input video processing unit 15 or the received video decoding unit 17, and advances the processing to step S102.
  • Step S102 The two-dimensional code image generation unit 18 generates a two-dimensional code, outputs it to the video composition unit 19, and advances the processing to step S103.
  • Step S103 The video composition unit 19 determines whether the frame is an even frame. If the frame is an even frame (step S103: Yes), the process proceeds to step S104. If the frame is an odd frame (step S103: No), the process proceeds to step S105. Proceed to (Step S104) The video composition unit 19 inverts the two-dimensional code image and advances the process to step S105. (Step S ⁇ b> 105)
  • the video synthesizing unit 19 synthesizes the display video image and the two-dimensional code image and outputs them to the video display unit 20.
  • the video composition unit 19 of the video display device 10 inverts the two-dimensional code image between the odd frame and the even frame and superimposes the two-dimensional code image on the display video image.
  • FIG. 4 is a schematic block diagram showing the configuration of the terminal device 50 according to the first embodiment of the present invention.
  • the terminal device 50 according to the present embodiment includes a control unit 51, a display unit 52, a display control unit 53, an operation panel 54, an operation detection unit 55, a communication unit 56, a communication data processing unit 57, and a camera.
  • the control unit 51 includes a CPU and the like, and controls the entire operation of the terminal device 50.
  • the display unit 52 includes a liquid crystal display, for example, and displays various images.
  • the display control unit 53 performs processing of an image displayed on the display unit 52 based on the control from the control unit 51.
  • the operation panel 54 includes a touch panel arranged on the display unit 52 in a stacked manner.
  • the operation detection unit 55 detects input coordinates of the operation panel 54, determines an input instruction, and outputs the input instruction to the control unit 51.
  • the communication unit 56 is connected to a mobile network such as LTE (Long Term Evolution) or a wireless LAN network, and transmits and receives various data.
  • the communication data processing unit 57 processes data transmitted and received by the communication unit 56 based on the control from the control unit 51.
  • the camera unit 58 captures an image.
  • the camera unit 58 is used to capture the display screen of the video display unit 20 of the video display device 10 and decode the two-dimensional code image superimposed on the video display device 10.
  • the captured image of the camera unit 58 is sent to the video detection unit 59.
  • the video detection unit 59 detects a captured image from the camera unit 58 and restores a two-dimensional code image from the captured image of the video display unit 20.
  • the video detection unit 59 takes a video level difference between the captured images of the camera unit 58 and integrates the difference values to restore the two-dimensional code image. That is, the video detection unit 59 detects a two-dimensional code image.
  • the restored (detected) two-dimensional code image is sent to the two-dimensional code decoding unit 60.
  • the two-dimensional code decoding unit 60 decodes the two-dimensional code from the two-dimensional code image restored by the video detection unit 59. Then, the two-dimensional code decoding unit 60 sends the decoded information to the control unit 51. The control unit 51 performs processing according to the decoded information.
  • FIG. 5 is a flowchart showing a process of restoring a two-dimensional code image from a captured image of the camera in the terminal device 50 according to the first embodiment of the present invention.
  • Step S201 The camera unit 58 captures images displayed on the image display device 10 at predetermined time intervals, and the process proceeds to step S202.
  • Step S202 The video detection unit 59 calculates the difference between the captured images of the camera unit 58, and advances the processing to step S203.
  • Step S203 The video detection unit 59 determines whether or not the upper left value of the image is positive. If the upper left value of the image is positive (Step S203: Yes), the process proceeds to Step S204, and the upper left value of the image If the value is negative (step S203: No), the process proceeds to step S205.
  • Step S204 The video detection unit 59 inverts the difference value and advances the processing to Step S205.
  • Step S205 The video detection unit 59 integrates the difference values, and restores the two-dimensional code image from the difference values.
  • the video detection unit 59 of the terminal device 50 restores the two-dimensional code image by integrating the video level difference between successive images captured by the camera unit 58.
  • FIG. 6 is an explanatory diagram of a superimposition process between a display video image and a two-dimensional code image in the video display device 10 according to the first embodiment of the present invention.
  • the display video image from the input video processing unit 15 or the received video decoding unit 17 is input to the video synthesis unit 19 in step S101 in FIG.
  • a two-dimensional code is generated and input to the video composition unit 19.
  • the video composition unit 19 inverts the two-dimensional code image between the odd frame and the even frame to synthesize the two-dimensional code image with the display video image.
  • FIG. 6A shows a two-dimensional code image that is inverted between odd frames (frames # 1, # 3, etc And even frames (frames # 2, # 4,).
  • B) shows the video level of the two-dimensional code image.
  • the video level of the two-dimensional code image synthesized by the video synthesis unit 19 is set to a low level of “0” to “1”.
  • FIG. 6C shows display video images input to the video composition unit 19 in frames # 1, # 2, # 3, # 4,..., And FIG. 6D shows frames # 1, # 2, and so on.
  • the video level of the display video image synthesized by the video synthesis unit 19 is “0” to “9”, and the video level of the two-dimensional code image (FIG. 6 ( B)) is a large level.
  • FIG. 6E shows a video composition unit that combines a display video image (FIG. 6C) and a two-dimensional code image (FIG. 6A) in frames # 1, # 2, # 3, # 4,. 19 shows the superimposed image
  • FIG. 6F shows the video level of the superimposed image at this time.
  • the video level of the superimposed image is a value obtained by adding the video level of the display video image shown in FIG. 6D and the video level of the two-dimensional code image shown in FIG. 6B, as shown in FIG. As described above, the odd frames (frames # 1, # 3,...) And the even frames (frames # 2, # 4,...) Have different levels.
  • FIG. 7 is an explanatory diagram of processing for restoring a two-dimensional code image from a captured image of the camera in the terminal device 50 according to the first embodiment of the present invention.
  • step S201 of FIG. 5 the video displayed on the video display device 10 by the camera unit 58 is captured every predetermined time.
  • the imaging interval of the camera unit 58 is synchronized with the frame period of the display screen of the video display device 10.
  • the video displayed on the video display device 10 is a video in which a two-dimensional code image is superimposed on a display video image, and the two-dimensional code image is inverted between odd frames and even frames (FIG. 6A). And FIG. 6B).
  • FIG. 7A shows captured images of the camera unit 58 every predetermined time
  • FIG. 7B shows the video level.
  • the imaging interval of the camera unit 58 is synchronized with the frame period of the display screen of the video display device 10.
  • the captured images V1, V2, V3, V4,... Of the camera unit 58 correspond to the images of frames # 1, # 2, # 3, # 4,.
  • step S202 difference values (V2-V1, V3-V2, V4-V3,...) Between the captured images of the camera unit 58 are obtained.
  • FIG. 7C shows a difference value between captured images of the camera unit 58. As shown in FIG. 7C, by taking the difference between the captured images of the camera unit 58, the component of the display video image is canceled and only the component of the two-dimensional code is extracted. Here, as illustrated in FIG. 7C, the sign of the difference value between the captured images of the camera unit 58 is inverted for each captured image.
  • steps S203 and S204 the sign of the numerical value is inverted according to the value at the upper left of the image.
  • FIG. 7D shows a value obtained by inverting the difference value in accordance with the upper left value of the image. That is, if the upper left value of the image is positive, the difference value is inverted. If the upper left value of the image is negative, the difference value is not inverted.
  • FIG. 7C the sign of the difference value between the captured images of the camera unit 58 is inverted every time the captured image is processed. As shown, the correction is made so that the signs of the difference values are aligned.
  • step S205 the corrected difference values are integrated.
  • FIG. 7E shows the integrated value of the difference values. As shown in FIG. 7E, the level increases by integrating the difference values. When the integrated value of the difference value reaches a predetermined level, the integrated value is divided into two, for example, a pixel having a positive integrated value of the differential value is white and a pixel having a negative integrated value is black.
  • the two-dimensional code can be restored (detected) as shown in FIG.
  • the two-dimensional code image includes predetermined information (hereinafter, code information).
  • the terminal device 50 establishes a connection for communicating with the video display device 10 using the code information of the restored two-dimensional code image, and communicates with the video display device 10.
  • the code information used by the terminal device 50 for communication with the video display device 10 includes various information such as information related to control of the video display device 10 and information related to video displayed on the video display device 10. That is, the terminal device 50 is connected to the video display device 10 using the code information, and can control the video display device 10 or transmit a video to be displayed on the video display device 10. Further, the terminal device 50 may be connected to the video display device 10 via a network to which the video display device 10 is connected. In this case, the code information includes information for connecting to the video display device 10 via the network. The terminal device 50 communicates the information with the video display device 10 after connecting to the video display device 10 via a network.
  • the video composition unit 19 of the video display device 10 inverts the two-dimensional code image between the odd frame and the even frame and superimposes the two-dimensional code image on the display video image.
  • the camera unit 58 of the terminal device 50 captures images of the image display device 10 at predetermined time intervals, and the image detection unit 59 integrates the difference in image level between consecutive captured images to obtain a two-dimensional code image. Is restoring.
  • the display level of the two-dimensional code image 101 is smaller than the display level of the display video image, and the two-dimensional code image is hardly visible. For this reason, it is possible to prevent the display video image from being hidden by the two-dimensional code image, and in the present embodiment, it is possible to detect the image displayed on the display video without deteriorating the display video. it can.
  • the video detection unit 59 of the terminal device 50 integrates the difference (V2-V1, V3-V2, V4-V3,%) Between each successive captured image. Some captured images may be skipped and integrated, such as V1, V4-V3, and V6-V5.
  • whether or not to invert the difference value is determined from the value at the upper left of the image, but it may be determined from the value at another position in the image.
  • the imaging interval of the camera unit 58 is synchronized with the frame of the display screen of the video display device 10
  • the sign of the difference value is inverted every time. Therefore, when the imaging interval of the camera unit 58 is synchronized with the frame of the display screen of the video display device 10, the difference value may be inverted every time. In short, the difference values may be corrected so that the signs of the difference values between the captured images are aligned.
  • the imaging interval of the camera unit 58 is synchronized with the frame of the display screen of the video display device 10, but the imaging interval of the camera unit 58 and the frame period of the display screen of the video display device 10 are assumed. There is no need to synchronize with.
  • an example in which the imaging interval of the camera unit 58 and the frame period of the display screen of the video display device 10 are not synchronized will be described.
  • FIG. 8 is an explanatory diagram of processing when the imaging interval of the camera unit 58 is shorter than the frame period of the display screen of the video display device 10 in the first embodiment of the present invention.
  • the video displayed on the video display device 10 is continuously captured by the camera unit 58 in step S201.
  • 8A shows a captured image of the camera unit 58
  • FIG. 8B shows the video level. If the imaging interval of the camera unit 58 is shorter than the frame period of the display screen of the video display device 10, an image of the same frame may be captured a plurality of times, and the captured images V1, V2, V3, V4,. Frames # 1, # 2, # 3, # 4,... Displayed on the display device 10 do not correspond.
  • the captured image V1 and the captured image V2 are both captured images of frame # 1, and are the same captured image.
  • the captured image V5 and the captured image V6 are both captured images of frame # 4 and the same captured image.
  • step S202 a difference value between the captured images of the camera unit 58 is obtained.
  • FIG. 8C shows a difference value between captured images of the camera unit 58. As shown in FIG. 8C, by taking the difference between the captured images of the camera unit 58, the component of the display video image is canceled and only the component of the two-dimensional code is extracted. Since the captured image V1 and the captured image V2 are the same captured image, the difference value is “0”. Further, since the captured image V6 and the captured image V5 are the same captured image, the difference value is “0”.
  • steps S203 and S204 the sign of the numerical value is inverted according to the value at the upper left of the image.
  • FIG. 8D shows a value obtained by inverting the difference value according to the upper left value of the image. By inverting the difference value according to the upper left value of the image, the difference value is corrected, and the signs of the difference values are aligned as shown in FIG.
  • step S205 the corrected difference values are integrated.
  • FIG. 8E shows the integrated value of the difference values. As shown in FIG. 8E, the level increases by integrating the difference values. When the integrated value of the difference values reaches a predetermined level, the two-dimensional code can be restored by binarizing the integrated value as shown in FIG.
  • the two-dimensional code image can be restored by the same processing as described above.
  • FIG. 9 is an explanatory diagram of processing when the imaging interval of the camera unit 58 is longer than the frame period of the display screen of the video display device 10 in the first embodiment of the present invention.
  • the video displayed on the video display device 10 is continuously captured by the camera unit 58 in step S201.
  • FIG. 9A shows a captured image of the camera unit 58
  • FIG. 9B shows the video level. If the imaging interval of the camera unit 58 is longer than the frame period of the display screen of the video display device 10, an image of a frame that is not captured is generated and displayed on the video display device 10 as captured images V1, V2, V3, V4,. Frames # 1, # 2, # 3, # 4,... No longer correspond. In this example, frame # 4 and frame # 7 are images of frames that are not captured.
  • step S202 a difference value between the captured images of the camera unit 58 is obtained.
  • FIG. 9C shows a difference value between captured images of the camera unit 58.
  • the component of the display video image is canceled and only the component of the two-dimensional code is extracted.
  • the captured image V4 is a captured image of frame # 5 and the captured image V3 is a captured image of frame # 3
  • the two-dimensional code image to be superimposed has the same sign. Therefore, the difference value of (V4 ⁇ V3) is “0”.
  • the captured image V6 is a captured image of frame # 8 and the captured image V5 is a captured image of frame # 6, the two-dimensional code image to be superimposed has the same sign. Therefore, the difference value of (V6 ⁇ V5) is “0”.
  • steps S203 and S204 the sign of the numerical value is inverted according to the value at the upper left of the image.
  • FIG. 9D shows a value obtained by inverting the difference value according to the upper left value of the image. By inverting the difference value according to the upper left value of the image, the difference value is corrected, and the signs of the difference values are aligned as shown in FIG. 9D.
  • step S205 the corrected difference values are integrated.
  • FIG. 9E shows the integrated value of the difference values. As shown in FIG. 9E, the level increases by integrating the difference values. When the integrated value of the difference values reaches a predetermined level, the two-dimensional code can be restored by binarizing the integrated value as shown in FIG.
  • the two-dimensional code image can be restored by the same process as described above.
  • the display video image 100 on which the two-dimensional code image 101 is superimposed is displayed on the video display unit 20 of the video display device 10, and the video display of the video display device 10 is performed.
  • the image of the unit 20 is captured by the camera unit 58 of the terminal device 50, and the two-dimensional code image is restored.
  • FIG. 10 shows an outline of a modification of the present invention.
  • the display video image 100a on which the two-dimensional code image 101a is superimposed is displayed on the display unit 52a of the terminal device 50a shown in FIG.
  • the two-dimensional code image 101a is an image inverted at a predetermined time interval.
  • FIG. 11 is a schematic block diagram showing the basic configuration of the image detection apparatus according to the present invention. That is, the image detection apparatus 200 according to the present invention has an imaging unit 201 and a detection unit 202 as a basic configuration.
  • the imaging unit 201 captures a superimposed image in which the first image 203 and the second image 204 are superimposed.
  • the detection unit 202 detects at least one of the first image 203 and the second image 204 based on the captured image captured by the imaging unit 201.
  • a program for realizing all or part of the functions of the image detection system 1 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into the computer system and executed. You may perform the process of each part.
  • the “computer system” includes an OS and hardware such as peripheral devices. Further, the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
  • the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
  • the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line.
  • a volatile memory in a computer system serving as a server or a client in that case and a program that holds a program for a certain period of time are also included.
  • the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.
  • the display video images 100 and 100a are not only images input from the outside of the video display device 10, but also test pattern images and on-screen images that are images generated inside the video display device 10, for example.
  • Various images stored in the storage unit of the video display device 10 may be used.
  • the two-dimensional code images 101 and 101a are examples of “code images”.
  • the “code image” may be not only the two-dimensional code images 101 and 101a but also a one-dimensional code image (barcode), for example.
  • the information shown in the “code image” is information expressed using binary values such as 0 and 1, or Low and High. That is, the “code image” can be said to be an image corresponding to binary information.
  • the binary of the “code image” uses the gradation of the closest display level (luminance), but is not limited to this, and is a gradation that is difficult to visually recognize when displayed on the video display unit 20. There should be a difference.
  • the gradation difference that is difficult to be visually recognized can be set in advance based on the number of gradations of the video image displayed on the video display unit 20.
  • the video display device 10 converts the two-dimensional code image into at least one image of red, green, and blue. 101 may be superimposed.
  • the terminal device 50 uses a video signal of at least one color among red, green, and blue.
  • the “code image” may be restored.
  • the camera unit 58 may be configured to capture at least the color.
  • Video display apparatus 11 Control part 12 Operation part 13 Operation detection part 14 Video input part 15 Input video processing part 16 Data receiving part 17 Received video decoding part 18 Two-dimensional code image generation part 19 Video composition part 20 Video display part 50 Terminal device 51 control unit 52 display unit 53 display control unit 54 operation panel 55 operation detection unit 56 communication unit 57 communication data processing unit 58 camera unit 59 video detection unit 60 two-dimensional code decoding unit

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  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
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  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
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  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

La présente invention a pour but de fournir un dispositif de détection d'image capable de supprimer une détérioration dans une image d'affichage et de détecter une image superposée sur l'image d'affichage. Un dispositif de détection d'image (200) comporte : une unité d'imagerie (201) pour capturer une image superposée dans laquelle une première image (203) et une seconde image (204) sont superposées ; et une unité de détection (202) pour détecter au moins une image parmi la première image (203) et la seconde image (204) sur la base de l'image capturée par l'unité d'imagerie (201).
PCT/JP2017/010382 2017-03-15 2017-03-15 Dispositif, système, et procédé de détection d'image WO2018167870A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2023127400A1 (fr) * 2021-12-28 2023-07-06

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006114827A1 (fr) * 2005-04-06 2006-11-02 Content Idea Of Asia Co., Ltd. Code bidimensionnel transparent, article dote d’un code bidimensionnel, procede d’impression d’un code bidimensionnel et procede d’affichage
JP2008033625A (ja) * 2006-07-28 2008-02-14 Kddi Corp カラー画像へのバーコード埋め込み方法および装置、およびコンピュータプログラム
JP2011101109A (ja) * 2009-11-04 2011-05-19 Nikon Corp 情報提供システム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006114827A1 (fr) * 2005-04-06 2006-11-02 Content Idea Of Asia Co., Ltd. Code bidimensionnel transparent, article dote d’un code bidimensionnel, procede d’impression d’un code bidimensionnel et procede d’affichage
JP2008033625A (ja) * 2006-07-28 2008-02-14 Kddi Corp カラー画像へのバーコード埋め込み方法および装置、およびコンピュータプログラム
JP2011101109A (ja) * 2009-11-04 2011-05-19 Nikon Corp 情報提供システム

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2023127400A1 (fr) * 2021-12-28 2023-07-06
WO2023127400A1 (fr) * 2021-12-28 2023-07-06 株式会社デンソーウェーブ Dispositif d'affichage de code d'informations et système d'affichage de code d'informations
JP7684608B2 (ja) 2021-12-28 2025-05-28 株式会社デンソーウェーブ 情報コード表示装置及び情報コード表示システム
US12367364B2 (en) 2021-12-28 2025-07-22 Denso Wave Incorporated Information code display device and information code display system

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