REPRODUCTION DETECTION DEVICE, REPRODUCTION DETECTION METHOD, AND PROGRAM
A reproduction detection device (2) that comprises: and imaging part (22) that captures an image of printed matter (1) into which a gradation of yellow has been printed and generates a captured image that is represented by an RGB color gamut; and a control part (24). The control part (24) converts t...
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Format | Patent |
Language | English French Japanese |
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04.07.2019
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Abstract | A reproduction detection device (2) that comprises: and imaging part (22) that captures an image of printed matter (1) into which a gradation of yellow has been printed and generates a captured image that is represented by an RGB color gamut; and a control part (24). The control part (24) converts the captured image that is represented by an RGB color gamut to a captured image that is represented by a Lab color space and extracts, from the captured image, a b channel that represents the b value of each pixel. Then the control part (24) binarizes the b value of each pixel of the b channel and generates a binarized image. When the portion of the binarized image that corresponds to the gradation of yellow does not have a prescribed shape, the control part (24) determines the printed matter (1) to be a reproduction.
L'invention concerne un dispositif de détection de reproduction (2) qui comprend : une partie d'imagerie (22) qui capture une image de matière imprimée (1) dans laquelle une gradation de jaune a été imprimée et génère une image capturée qui est représentée par une gamme de couleurs RVB ; et une partie de commande (24). La partie de commande (24) convertit l'image capturée qui est représentée par une gamme de couleurs RVB en une image capturée qui est représentée par un espace colorimétrique de laboratoire et extrait, à partir de l'image capturée, un canal b qui représente la valeur b de chaque pixel. Ensuite, la partie de commande (24) binarise la valeur b de chaque pixel du canal b et génère une image binarisée. Lorsque la partie de l'image binarisée qui correspond à la gradation du jaune ne présente pas une forme prescrite, la partie de commande (24) détermine la matière imprimée (1) comme étant une reproduction.
複製検知装置(2)は、黄色のグラデーションが印刷された印刷物(1)を撮像して、RGB色域で表される撮像画像を生成する撮像部(22)と、制御部(24)と、を備える。制御部(24)は、RGB色域で表される撮像画像をLab表色系で表される撮像画像に変換して、撮像画像から各画素のb値を表すbチャンネルを抽出する。制御部(24)は、bチャンネルの各画素のb値を二値化して二値化画像を生成する。そして、制御部(24)は、二値化画像において黄色のグラデーションに対応する部分が、所定の形状を有していない場合、印刷物(1)を複製物と判別する。 |
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AbstractList | A reproduction detection device (2) that comprises: and imaging part (22) that captures an image of printed matter (1) into which a gradation of yellow has been printed and generates a captured image that is represented by an RGB color gamut; and a control part (24). The control part (24) converts the captured image that is represented by an RGB color gamut to a captured image that is represented by a Lab color space and extracts, from the captured image, a b channel that represents the b value of each pixel. Then the control part (24) binarizes the b value of each pixel of the b channel and generates a binarized image. When the portion of the binarized image that corresponds to the gradation of yellow does not have a prescribed shape, the control part (24) determines the printed matter (1) to be a reproduction.
L'invention concerne un dispositif de détection de reproduction (2) qui comprend : une partie d'imagerie (22) qui capture une image de matière imprimée (1) dans laquelle une gradation de jaune a été imprimée et génère une image capturée qui est représentée par une gamme de couleurs RVB ; et une partie de commande (24). La partie de commande (24) convertit l'image capturée qui est représentée par une gamme de couleurs RVB en une image capturée qui est représentée par un espace colorimétrique de laboratoire et extrait, à partir de l'image capturée, un canal b qui représente la valeur b de chaque pixel. Ensuite, la partie de commande (24) binarise la valeur b de chaque pixel du canal b et génère une image binarisée. Lorsque la partie de l'image binarisée qui correspond à la gradation du jaune ne présente pas une forme prescrite, la partie de commande (24) détermine la matière imprimée (1) comme étant une reproduction.
複製検知装置(2)は、黄色のグラデーションが印刷された印刷物(1)を撮像して、RGB色域で表される撮像画像を生成する撮像部(22)と、制御部(24)と、を備える。制御部(24)は、RGB色域で表される撮像画像をLab表色系で表される撮像画像に変換して、撮像画像から各画素のb値を表すbチャンネルを抽出する。制御部(24)は、bチャンネルの各画素のb値を二値化して二値化画像を生成する。そして、制御部(24)は、二値化画像において黄色のグラデーションに対応する部分が、所定の形状を有していない場合、印刷物(1)を複製物と判別する。 |
Author | KAMIAKA Takuya AZUMA Youichi TOYOIZUMI Hiroshi KAYAMA Tetsu |
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DocumentTitleAlternate | DISPOSITIF DE DÉTECTION DE REPRODUCTION, PROCÉDÉ DE DÉTECTION DE REPRODUCTION ET PROGRAMME 複製検知装置、複製検知方法、及びプログラム |
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RelatedCompanies | A.T COMMUNICATIONS CO., LTD |
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Snippet | A reproduction detection device (2) that comprises: and imaging part (22) that captures an image of printed matter (1) into which a gradation of yellow has... |
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SubjectTerms | BOOK COVERS BOOKBINDING CALCULATING COMPUTING COUNTING DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR FILES HANDLING RECORD CARRIERS IMAGE DATA PROCESSING OR GENERATION, IN GENERAL LOOSE LEAVES MOVABLE-STRIP WRITING OR READING APPARATUS PERFORMING OPERATIONS PHYSICS PRESENTATION OF DATA PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR RECOGNITION OF DATA RECORD CARRIERS SPECIAL PRINTED MATTER TRANSPORTING |
Title | REPRODUCTION DETECTION DEVICE, REPRODUCTION DETECTION METHOD, AND PROGRAM |
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