WO2006003698A1 - 二次元バーコード画像生成のための装置、方法、プログラム、情報伝送のためのシステム、方法、及び二次元バーコード復号のための装置、方法、プログラム - Google Patents
二次元バーコード画像生成のための装置、方法、プログラム、情報伝送のためのシステム、方法、及び二次元バーコード復号のための装置、方法、プログラム Download PDFInfo
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- WO2006003698A1 WO2006003698A1 PCT/JP2004/009316 JP2004009316W WO2006003698A1 WO 2006003698 A1 WO2006003698 A1 WO 2006003698A1 JP 2004009316 W JP2004009316 W JP 2004009316W WO 2006003698 A1 WO2006003698 A1 WO 2006003698A1
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- dimensional barcode
- dot
- difference signal
- information
- value
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K1/00—Methods or arrangements for marking the record carrier in digital fashion
- G06K1/12—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching
- G06K1/121—Methods or arrangements for marking the record carrier in digital fashion otherwise than by punching by printing code marks
Definitions
- Apparatus, method and program for two-dimensional barcode image generation system and method for information transmission
- the present invention relates to a two-dimensional barcode image generation device, a two-dimensional barcode image generation method, a two-dimensional barcode image generation program, and a two-dimensional barcode generated and transmitted by the two-dimensional barcode image generation device that generates a two-dimensional barcode image.
- a two-dimensional barcode decoding apparatus, a two-dimensional barcode decoding method, a two-dimensional barcode decoding program, and a two-dimensional barcode image for decoding a two-dimensional barcode are generated and transmitted.
- the present invention relates to an information transmission system and information transmission method for obtaining information by reading.
- FIG. 13 is a diagram illustrating an example of a two-dimensional barcode.
- Some recent portable information terminals are equipped with a function for recognizing the two-dimensional barcode. This portable information terminal captures a two-dimensional barcode on a printed material using an image sensor, performs image processing, and decodes the original information.
- Patent Document 1 JP-A-6-208450 (Page 2-3, Fig. 1)
- FIG. 14 is a diagram showing an example of barcode deterioration, in which the two-dimensional barcode shown in FIG. 13 is transmitted through a transmission line with a limited bandwidth, or is displayed on a display device with a low resolution.
- a two-dimensional barcode represented by a black and white square is binary information and has an infinite spatial frequency bandwidth. Therefore, an appropriate low-pass filter that satisfies the Nyquist frequency is provided in the transmission path to the display device, and the display device needs to have sufficient resolution. If the bandwidth of the transmission path to the display device is narrow or the resolution of the display device is low, aliasing occurs in the spatial frequency domain, causing an error.
- the present invention has been made to solve such a problem, and is an information transmission system capable of accurately transmitting information of a two-dimensional barcode even when a transmission path with a narrow band is used.
- an object of the present invention is to provide a two-dimensional barcode decoding apparatus, a two-dimensional barcode decoding method, and a two-dimensional barcode decoding program that capture and decode a two-dimensional barcode image.
- the present invention is a two-dimensional barcode image generation device that generates a color image based on a two-dimensional barcode, and a two-dimensional barcode encoding unit that encodes input information as a two-dimensional barcode.
- An up-sampling unit for up-sampling the two-dimensional barcode, a luminance signal generating unit for limiting the output of the up-sampling unit and outputting it as a luminance signal, and an output of the up-sampling unit adjacent to each other
- a color difference signal generation unit that outputs a change amount of information as a color difference signal.
- the color difference signal generation unit in the present embodiment includes a blue difference signal generation unit and a red difference signal generation unit.
- the luminance signal generation unit takes the luminance signal value at the central dot as the luminance signal value.
- the band is limited by setting the median value of the range to be obtained and interpolating the value of the luminance signal at the nearest information dot and the value of the luminance signal at the nearest central dot as the median value of the obtained range. To do.
- the value of each dot is represented between 0 and 1
- the dot having the value before the upsampling is represented as an information dot.
- the dot located at the midpoint of the information dot in contact is the center dot
- the dot other than the information dot and the center dot is a gap dot
- the blue color difference signal and the red color difference signal are used as the color difference signal
- the other value of the signal and the red color difference signal is set to 0 when the values of adjacent information dots are different, and is set to 1 when the values of adjacent information dots are equal.
- the value of the blue difference signal and the red difference signal at the dot is set to 0, and the value of the blue difference signal and the red difference signal at the gap dot is set to the value obtained by interpolating the value of the nearest information dot and the value of the center dot. .
- the luminance signal generation unit sets the luminance signal value at the central dot as the median value of the range that the luminance signal can take, and sets the luminance signal value at the gap dot as the luminance signal at the nearest information dot.
- the band can be limited by interpolating the value of the luminance signal at the center dot closest to the value of.
- a color image of a two-dimensional barcode can be transmitted as a color television signal by using a luminance signal, a blue difference signal, and a red difference signal.
- the present invention also provides a two-dimensional barcode decoding apparatus that captures a color image including a two-dimensional barcode and decodes information included in the two-dimensional barcode,
- a camera that captures a color image including a code, a luminance signal and a color difference from the color image
- An image processing unit that acquires a signal, acquires a change amount of adjacent information, obtains the color difference signal power, and decodes the two-dimensional barcode from the luminance signal corrected using the change amount.
- an error rate in reading a two-dimensional barcode can be reduced by using a color difference signal as information supplementing a luminance signal.
- the two-dimensional barcode decoding apparatus preferably includes a display unit that displays information obtained by the decoding.
- the color difference signal is a blue color difference signal and a red color difference signal
- the image processing unit has the luminance signal, the blue color difference signal, and the red color signal in a range corresponding to a unit of information of the two-dimensional barcode.
- the average value of the difference signal is calculated as an average luminance signal, an average blue difference signal, and an average red difference signal, respectively, and the amount of change in adjacent information is obtained from the average color difference signal and corrected using the amount of change.
- the two-dimensional barcode is decoded from the average luminance signal.
- this two-dimensional barcode decoding apparatus can be characterized by being provided in a portable information terminal.
- This apparatus can be easily provided in a portable information terminal equipped with a camera in recent years, and the usability of the portable information terminal can be further enhanced.
- the mobile information terminal may include, for example, a mobile phone, a notebook personal computer, a PDA (Personal Digital Assistant), a digital camera, a digital video camera, and the like.
- the present invention also generates and transmits a color image based on a two-dimensional barcode on the transmission side, and reads the two-dimensional barcode by photographing the color image displayed on the reception side.
- An information transmission system comprising: a two-dimensional barcode encoding unit that encodes input information as a two-dimensional barcode; an upsampling unit that performs upsampling of the two-dimensional barcode; and an upsampling unit Two-dimensionally provided with a luminance signal generation unit that limits the output and outputs as a luminance signal, and a color difference signal generation unit that outputs a change amount of adjacent information as a color difference signal at the output of the upsampling unit A barcode image generating device, a display device for displaying the output of the two-dimensional barcode image generating device, and a two-dimensional barcode displayed on the display device.
- a two-dimensional barcode decoding apparatus comprising: an image processing unit that obtains a change amount of information from the color difference signal and decodes the two-dimensional barcode from the luminance signal corrected using the change amount.
- the present invention is also a two-dimensional barcode image generation method for generating a color image based on a two-dimensional barcode, wherein the input information is encoded as a two-dimensional barcode.
- An upsampling step that performs upsampling of the two-dimensional barcode, a luminance signal generation step that outputs a band signal to the output of the upsampling step, and outputs the luminance signal, and an output of the upsampling step
- a color difference signal generating step for outputting a change amount of adjacent information as a color difference signal.
- a dot having a value before the upsampling is set as an information dot, and a dot positioned at an intermediate point between the P dots in contact is a center dot
- the luminance signal generation step uses the luminance signal value at the central dot as the median of the range that the luminance signal can take, and the luminance signal value at the gap dot
- the band limitation can be performed by interpolating the value of the luminance signal at the closest information dot and the value of the luminance signal at the closest central dot.
- the value of each dot is represented between 0 and 1, and the dot having the value before the upsampling is set as an information dot, and is set at an intermediate point between adjacent information dots.
- the dot located is the center dot
- the dots other than the information dot and the center dot are the gap dots
- the blue color difference signal and the red color difference signal are used as the color difference signal
- the color difference signal generating step One of the difference signal and the red difference signal is set to 1 when the values of the adjacent information dots are different, and 0 when the values of the adjacent information dots are equal.
- the other value is 0 when the values of adjacent information dots are different, and 1 when the values of information dots in contact with P are equal, and the blue difference signal and red difference in the information dot
- the value of the No. to 0, to a value obtained by interpolating the values and values of the central dot closest information dot values of the blue color difference signal and red color difference signal in the gap dots can be especially ⁇ insole.
- the luminance signal value at the central dot is set to the median value of the range that the luminance signal can take, and the luminance signal value at the gap dot is set to the luminance signal value at the nearest information dot.
- the band can be limited by interpolating the value of the luminance signal at the center dot closest to the value.
- the present invention is a two-dimensional barcode decoding method for capturing a color image including a two-dimensional barcode and decoding information included in the two-dimensional barcode,
- a luminance signal and a color difference signal are obtained from the color image
- a change amount of adjacent information is obtained from the color difference signal
- the luminance signal is corrected using the change amount
- an image processing step for decoding the two-dimensional barcode for decoding the two-dimensional barcode.
- the color difference signal is a blue color difference signal and a red color difference signal
- the image processing step is performed in a range corresponding to a unit of information of the two-dimensional barcode.
- the average value of the red color difference signal are average luminance signal, average blue color difference signal, and average red color difference signal, respectively, and a change amount of adjacent information is obtained from the average color difference signal, and the change amount is used.
- the two-dimensional barcode is decoded from the corrected average luminance signal.
- the present invention generates and transmits a color image based on a two-dimensional barcode on the transmission side, and transmits information that reads the two-dimensional barcode by photographing a color image displayed on the reception side.
- a two-dimensional barcode encoding step for encoding input information as a two-dimensional barcode; and a luminance signal generating step for performing upsampling restriction on the two-dimensional barcode and outputting the luminance information as a luminance signal;
- a two-dimensional barcode generation step for generating a two-dimensional barcode image to be transmitted, comprising: a color difference signal generation step for outputting a change amount of adjacent information as a color difference signal at the output of the upsampling step;
- a display step for receiving and displaying the two-dimensional barcode image, and a photographing step for photographing the two-dimensional barcode image.
- the present invention is a two-dimensional barcode image generation program for causing a computer to execute a two-dimensional barcode image generation method for generating a color image based on a two-dimensional barcode, A two-dimensional barcode encoding step for encoding as a two-dimensional barcode, an upsampling step for upsampling the two-dimensional barcode, and band-limiting the output of the upsampling step, and outputting as a luminance signal
- the computer is caused to execute a luminance signal generation step and a color difference signal generation step of outputting a change amount of adjacent information as a color difference signal in the output of the upsampling step.
- the dot having the value before the upsampling is set as an information dot
- the dot positioned at the midpoint between adjacent information dots is set as a center dot and an information dot.
- the luminance signal generation step uses the luminance signal value at the central dot as the median value of the range that the luminance signal can take, and the luminance signal value at the gap dot as The band can be limited by interpolating the luminance signal value at the nearest information dot and the luminance signal value at the nearest center dot.
- the value of each dot is expressed between 0 and 1
- the dot having the value before the upsampling is set as an information dot
- the dots other than the information dot and the center dot are the gap dots
- the blue color difference signal and the red color difference signal are used as the color difference signal
- the color difference signal generation step includes the blue color difference signal and the red color difference signal at the center dot.
- One of the values is 1 when the values of adjacent information dots are different, 0 when the values of adjacent information dots are equal, and the other value of the blue difference signal and red difference signal at the center dot is 0 when the value of the P-contacting information dot is different, 1 when the value of the P-contacting information dot is the same, and the blue and red difference signals at the information dot
- the value is 0, it can be characterized by a value obtained by interpolating the values of the center dots of the closest information dot values of the blue color difference signal and red color difference signal in the gap dot.
- the present invention captures a two-dimensional barcode, and information contained in the two-dimensional barcode.
- a two-dimensional barcode decoding program for causing a computer to execute a two-dimensional barcode decoding method for decoding information, a photographing step for photographing a color image including the two-dimensional barcode, and a luminance signal from the color image
- the computer executes an image processing step of obtaining a color difference signal, obtaining a change amount of adjacent information from the color difference signal, and decoding the two-dimensional barcode from the luminance signal corrected using the change amount.
- the color difference signal is a blue color difference signal and a red color difference signal
- the image processing step is performed in a range corresponding to a unit of information of the two-dimensional barcode, the luminance signal, the blue color difference signal, and the red color signal.
- the average value of the difference signal is calculated as the average luminance signal, the average blue difference signal, and the average red difference signal, respectively, and the change amount of the information contacting P is obtained from the average color difference signal and corrected using the change amount.
- the two-dimensional barcode is decoded from the average luminance signal.
- a computer-readable medium is a portable storage medium such as a CD-ROM, a flexible disk, a DVD disk, a magneto-optical disk, an IC card, a database holding a computer program, or other computers and the like. It includes databases and transmission media on the line.
- FIG. 1 is a block diagram showing an example of a configuration of an information transmission system according to the present embodiment.
- FIG. 2 is a block diagram showing an example of the configuration of a two-dimensional barcode image generation device according to the present embodiment.
- FIG. 3 is a flowchart showing an example of the operation of the two-dimensional barcode image generation apparatus according to the present embodiment.
- FIG. 4 is a diagram showing a specific example of upsampling.
- FIG. 5 is a flowchart showing an example of the operation of the luminance signal generation unit according to the present embodiment.
- FIG. 6 is a diagram showing a specific example of a transmission luminance signal Y.
- FIG. 7 is a flowchart showing an example of the operation of the blue color difference signal generation unit according to the present embodiment.
- FIG. 8 is a diagram showing a specific example of a transmission blue color difference signal Cb.
- FIG. 9 is a flowchart showing an example of the operation of the red color difference signal generation unit according to the present embodiment.
- FIG. 10 is a diagram showing a specific example of a transmission red color difference signal Cr.
- FIG. 11 is a block diagram showing an example of a configuration of a portable information terminal according to the present embodiment.
- FIG. 12 is a flowchart showing an example of a two-dimensional barcode decoding operation in the image processing unit according to the present embodiment.
- FIG. 13 is a diagram showing an example of a two-dimensional barcode.
- FIG. 14 is a diagram showing an example of two-dimensional barcode deterioration in the display device.
- information to be transmitted is generated as a color image based on a two-dimensional barcode, and is displayed and displayed on a display device via television broadcasting.
- a color image is taken with a portable information terminal and the information is decoded.
- FIG. 1 is a block diagram showing an example of the configuration of the information transmission system according to the present embodiment.
- the information transmission system according to the present embodiment includes a two-dimensional barcode image generation device 1, a transmitter 2, a transmission path 3, a receiver 4, a display device 5, and a portable information terminal 6.
- the two-dimensional barcode image generating apparatus 1 encodes the input information as a two-dimensional barcode, further converts it into a color television signal, and outputs it to the transmitter 2.
- the transmitter 2 modulates the input color television signal as a radio signal and outputs it to the transmission path 3.
- the receiver 4 demodulates the color television signal from the radio signal received from the transmission path 3 and outputs it to the display device 5.
- the display device 5 displays the input color television signal on the screen as an image including a two-dimensional barcode.
- the portable information terminal 6 includes a camera, captures an image including a two-dimensional barcode displayed on the display device 5, decodes the two-dimensional barcode, and outputs information.
- the portable information terminal 6 constitutes the two-dimensional barcode decoding device of the present invention.
- FIG. 2 is a block diagram showing an example of the configuration of the two-dimensional barcode image generation apparatus according to the present embodiment.
- a two-dimensional barcode image generating apparatus 1 according to the present embodiment includes a two-dimensional barcode encoding unit 11, an upsampling unit 12, a luminance signal generating unit 13, a blue color difference signal generating unit 14, and a red color difference signal generating unit 15
- the color television signal generation unit 16 includes:
- FIG. 3 is a flowchart showing an example of the operation of the two-dimensional barcode image generation device according to the present embodiment.
- the two-dimensional barcode encoding unit n encodes the input information according to the rules of the two-dimensional barcode, and generates a two-dimensional barcode information array (S 1). 0 This two-dimensional barcode information array It is expressed as a binary luminance consisting of 0 (black) and luminance 1 (white).
- the upsampling unit 12 performs upsampling by inserting a predetermined number of empty dots between adjacent dots of the two-dimensional barcode information array, and generates an enlarged two-dimensional barcode information array ( S2).
- the dots having the value of the two-dimensional barcode information array are defined as information dots.
- the dot located at the midpoint of the adjacent information dot is the center dot, and the other dots are the gap dots.
- FIG. 4 is a diagram showing a specific example of upsampling.
- Fig. 4 (a) is a two-dimensional barcode information array
- Fig. 4 (b) is an image representing the two-dimensional barcode information array as luminance
- Fig. 4 (c) is an enlarged two-dimensional barcode generated by upsampling. Represents an information array.
- the dot row 100 in the enlarged two-dimensional barcode information array in FIG. 4 (c) will be described as a specific example.
- the luminance signal generation unit 13 generates a transmission luminance signal Y from the enlarged two-dimensional barcode information array (S3).
- the blue color difference signal generation unit 14 generates a transmission blue color difference signal Cb from the expanded two-dimensional barcode information array (S4).
- the red color difference signal generation unit 15 generates a transmission red color difference signal Cr from the enlarged two-dimensional barcode information array (S5).
- the color television signal generation unit 16 converts the transmission luminance signal Y, the transmission blue difference signal Cb, and the transmission red difference signal Cr into a transmission color television signal and outputs it to the transmission line (S6). .
- the luminance signal generator 13 and the blue color difference signal in the two-dimensional barcode image generator 1 Details of operations of the signal generation unit 14 and the red color difference signal generation unit 15 will be described.
- FIG. 5 is a flowchart showing an example of the operation of the luminance signal generation unit according to the present embodiment.
- the luminance signal generation unit 13 determines the information dot value of the expanded two-dimensional barcode information array as it is as the information dot value of the transmission luminance signal Y (Sl l).
- the value of the gap dot of the transmission luminance signal Y is determined so as to interpolate the values of the information dot and the center dot of the transmission luminance signal Y (S13).
- FIG. 6 is a diagram illustrating a specific example of the transmission luminance signal Y.
- 6A shows the transmission luminance signal Y after processing S11
- FIG. 6B shows the transmission luminance signal Y after processing SI2
- FIG. 6C shows the transmission luminance signal Y after processing S13.
- FIG. 7 is a flowchart showing an example of the operation of the blue color difference signal generation unit according to the present embodiment.
- the blue color difference signal generator 14 provisionally determines the information dot value of the enlarged two-dimensional barcode information array as the value of the information dot of the transmission blue color difference signal Cb (S21).
- the absolute value of the difference between adjacent information dot values of the transmission blue difference signal Cb is determined as the value of the center dot of the transmission blue difference signal Cb (S22).
- the value of the information dot of the transmission blue difference signal Cb is set to 0 (S23), and the value of the gap dot of the transmission blue difference signal Cb is interpolated between the information dot of the transmission blue difference signal Cb and the value of the center dot. Is determined (S24).
- FIG. 8 is a diagram illustrating a specific example of the transmission blue color difference signal Cb.
- Fig. 8 (&) is the transmission blue difference signal 03 after processing 321
- Fig. 8 (b) is the transmission blue difference signal Cb after processing S22
- Fig. 8 (c) is the transmission blue difference signal Cb after processing S23
- 8 (d) represents the transmitted blue color difference signal Cb after processing S24.
- FIG. 9 is a flowchart showing an example of the operation of the red color difference signal generation unit according to the present embodiment.
- the red color difference signal generation unit 15 provisionally determines the information dot value of the enlarged two-dimensional barcode information array as the information dot value of the transmission red color difference signal Cr (S31).
- the value of the information dot of the transmission red difference signal is 0, it is replaced with -1 and the value obtained by multiplying the absolute value of the sum of adjacent information dot values by 1Z2 is used as the center dot of the transmission red difference signal Cr. It is determined as the value of (S32).
- the information dot value of the transmission red color difference signal Cr is set to 0 (S33), and the gap value of the transmission red color difference signal Cr is interpolated so that the information dot value and the center dot value of the transmission red color difference signal are interpolated. S34) to determine the value of the input.
- FIG. 10 is a diagram showing a specific example of the transmission red color difference signal Cr.
- Fig. 10 (&) shows the transmission red difference signal 0 after processing 331
- Fig. 10 (b) shows the transmission red difference signal Cr after processing S32
- Fig. 10 (c) shows the transmission red difference signal Cr after processing S33
- FIG. 10 (d) represents the transmission red color difference signal Cr after the process S34.
- FIG. 11 is a block diagram showing an example of the configuration of the portable information terminal according to the present embodiment.
- the portable information terminal according to the present embodiment is a two-dimensional barcode decoding device, which includes a control unit 61, an operation unit 62, a camera 63, an image processing unit 64, a storage unit 65, a display unit 66, a wireless communication unit 67, It consists of an audio input unit 68 and an audio output unit 69.
- the portable information terminal can be similarly configured by a power notebook type personal computer, a PDA (Personal Digital Assistant), a digital power camera, a digital video camera or the like taking a mobile phone as an example.
- PDA Personal Digital Assistant
- the control unit 61 controls each unit.
- the operation unit 62 receives input from the user.
- the storage unit 65 stores programs used by the control unit 61, images used by the image processing unit 64, and the like.
- the camera 63 performs shooting according to a user operation on the operation unit 62.
- the image processing unit 64 performs processing such as two-dimensional barcode decoding using the captured image.
- the wireless communication unit 67 communicates with the base station using voice or data.
- the voice input unit 68 inputs the voice to be transmitted from the user.
- the audio output unit 69 outputs the received audio to the user.
- the display unit 66 displays images and data.
- FIG. 12 is a flowchart showing an example of the operation of decoding the two-dimensional barcode in the image processing unit according to the present embodiment.
- the control unit 61 starts a two-dimensional barcode reading operation in accordance with a user operation on the operation unit 62.
- the camera 63 captures a color image including a two-dimensional barcode in accordance with a user operation on the operation unit 62 (S41).
- the captured image has a resolution for oversampling N times the original two-dimensional barcode, and the color is represented by (R, G, B).
- the image processing unit 64 detects the position of the two-dimensional barcode and the readout grid that is the unit of the original two-dimensional barcode dot from the captured image (S42). Therefore, read One side of the protruding grid is represented by N pixels. For detection of the position, a predetermined marker or pilot pattern included in the two-dimensional bar code is used.
- the image processing unit 64 determines whether or not the position and readout grid have been successfully detected (S43). If the detection fails (S43, No), the process returns to S41. On the other hand, if the detection is successful (S43, Yes), the color two-dimensional color component (R, G, B), which is the respective component of the two-dimensional barcode extracted from the captured image and the detected position.
- the barcode image array (R, G, B) is acquired (S44).
- the image processing unit 64 performs conversion from (R, G, B) to (Y, Cb, Cr) for the color of the color two-dimensional barcode image array (R, G, B).
- the color two-dimensional barcode image array (Y, Cb, Cr) is acquired (S45).
- the image processing unit 64 calculates the average value of Y, the average value of Cb, and the average value of Cr for each readout grid in the color two-dimensional barcode image array (Y, Cb, Cr), and each color It is stored in the storage unit 65 as a two-dimensional barcode information array (Y, Cb, Cr) (S46). Accordingly, the color two-dimensional barcode information array (Y, Cb, Cr) is an array having the same size as the transmitted two-dimensional barcode information array.
- the image processing unit 64 reads one dot of the color two-dimensional barcode information array (Y, Cb, Cr) force, and sets them as Yl, Cbl, and Crl, respectively (S47).
- the previously read one dot is read out from the color two-dimensional barcode information arrangement
- the image processing unit 64 determines whether or not Cbl> Crl (S50).
- Y0 ⁇ threshold When Cbl> Crl is satisfied (S50, Yes), it is determined whether Y0 ⁇ threshold is satisfied (S60).
- ⁇ can take a range from 0 to 1, the threshold is, for example, 0.5. If the threshold value is 0 (S60, Yes), Y1 is increased by a predetermined value (S61), and the process proceeds to S75. On the other hand, if Y0 is not the threshold value (S60, No), Y1 is decreased by a predetermined value (S62), and the process proceeds to process S75.
- a color television signal may be transmitted by wired power as described in the example of transmitting a two-dimensional barcode as a television broadcast.
- color printing may be performed using the transmission luminance signal Y, the transmission blue difference signal Cb, and the transmission red difference signal Cr, and the printed matter may be photographed with a portable information terminal.
- a two-dimensional barcode can be used in television broadcasting, and the two-dimensional displayed on a television having a lower resolution than a printed matter.
- the error rate when reading barcodes with a portable information terminal equipped with a camera can be greatly reduced.
- the transmitted color two-dimensional barcode image is compatible with a conventional monochrome two-dimensional barcode image, and even in a portable information terminal that decodes a conventional monochrome two-dimensional barcode. Can be decrypted.
- the image of the two-dimensional barcode in the present embodiment is color printing, even a printed matter having a lower resolution or poor paper quality than the conventional two-dimensional barcode is read.
- the error rate can be greatly reduced.
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Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2004/009316 WO2006003698A1 (ja) | 2004-07-01 | 2004-07-01 | 二次元バーコード画像生成のための装置、方法、プログラム、情報伝送のためのシステム、方法、及び二次元バーコード復号のための装置、方法、プログラム |
JP2006527612A JPWO2006003698A1 (ja) | 2004-07-01 | 2004-07-01 | 二次元バーコード画像生成のための装置、方法、プログラム、情報伝送のためのシステム、方法、及び二次元バーコード復号のための装置、方法、プログラム |
EP04746785A EP1768050A1 (en) | 2004-07-01 | 2004-07-01 | Device, method, and program for creating a two-dimensional barcode image, system and method for information transmission, and device, method, and program for decoding the two-dimensional barcode |
CNA2004800434819A CN1977278A (zh) | 2004-07-01 | 2004-07-01 | 用于二维条形码图像生成的装置、方法、程序,用于信息传送的系统、方法,以及用于二维条形码解码的装置、方法、程序 |
US11/645,253 US20070119940A1 (en) | 2004-07-01 | 2006-12-22 | Apparatus, method and program for generating two-dimensional bar code image, system and method for information transmission and apparatus method and program for decoding two-dimensional bar code |
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PCT/JP2004/009316 WO2006003698A1 (ja) | 2004-07-01 | 2004-07-01 | 二次元バーコード画像生成のための装置、方法、プログラム、情報伝送のためのシステム、方法、及び二次元バーコード復号のための装置、方法、プログラム |
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US11/645,253 Continuation US20070119940A1 (en) | 2004-07-01 | 2006-12-22 | Apparatus, method and program for generating two-dimensional bar code image, system and method for information transmission and apparatus method and program for decoding two-dimensional bar code |
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PCT/JP2004/009316 WO2006003698A1 (ja) | 2004-07-01 | 2004-07-01 | 二次元バーコード画像生成のための装置、方法、プログラム、情報伝送のためのシステム、方法、及び二次元バーコード復号のための装置、方法、プログラム |
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US (1) | US20070119940A1 (ja) |
EP (1) | EP1768050A1 (ja) |
JP (1) | JPWO2006003698A1 (ja) |
CN (1) | CN1977278A (ja) |
WO (1) | WO2006003698A1 (ja) |
Cited By (2)
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WO2008133303A1 (ja) * | 2007-04-24 | 2008-11-06 | Olympus Corporation | 撮像機器及びその認証方法 |
WO2012112770A2 (en) * | 2011-02-16 | 2012-08-23 | Augme Technologies, Inc. | System for enhanced barcode decoding and image recognition and method therefor |
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CN104951828B (zh) * | 2015-06-12 | 2018-03-02 | 矽图(厦门)科技有限公司 | 彩色高阶隐形图像码的生成方法 |
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2004
- 2004-07-01 EP EP04746785A patent/EP1768050A1/en not_active Withdrawn
- 2004-07-01 WO PCT/JP2004/009316 patent/WO2006003698A1/ja not_active Application Discontinuation
- 2004-07-01 JP JP2006527612A patent/JPWO2006003698A1/ja not_active Withdrawn
- 2004-07-01 CN CNA2004800434819A patent/CN1977278A/zh active Pending
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2006
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JP2003189020A (ja) * | 2001-12-20 | 2003-07-04 | Atsushi Matsushita | 画面を用いた通信方法及び通信システム |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2008133303A1 (ja) * | 2007-04-24 | 2008-11-06 | Olympus Corporation | 撮像機器及びその認証方法 |
WO2012112770A2 (en) * | 2011-02-16 | 2012-08-23 | Augme Technologies, Inc. | System for enhanced barcode decoding and image recognition and method therefor |
WO2012112770A3 (en) * | 2011-02-16 | 2012-12-06 | Augme Technologies, Inc. | System for enhanced barcode decoding and image recognition and method therefor |
Also Published As
Publication number | Publication date |
---|---|
US20070119940A1 (en) | 2007-05-31 |
CN1977278A (zh) | 2007-06-06 |
JPWO2006003698A1 (ja) | 2008-04-17 |
EP1768050A1 (en) | 2007-03-28 |
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