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Printed matter color detection method and device

A technology for color detection and printed matter, applied in the printing field, can solve the problems of low efficiency of color detection

Active Publication Date: 2019-09-06
BEIJING LUSTER LIGHTTECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to overcome the problem of low efficiency of printed matter color detection in the related art, the application provides a printed matter color detection method and device

Method used

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  • Printed matter color detection method and device
  • Printed matter color detection method and device
  • Printed matter color detection method and device

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Embodiment Construction

[0155] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with aspects of the present application as recited in the appended claims.

[0156] In the following detailed description, numerous specific details are set forth in order to provide a comprehensive understanding of the application, but those skilled in the art will understand that the application may be practiced without these specific details. In other embodiments, well-known methods, procedures, components and circuits have not been described in detail so as n...

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Abstract

Embodiments of the invention disclose a print color detection method and a print color detection device. When there is a color control bar, the color control bar can be used in color detection. The LAB value of a color lump is acquired directly by building an LAB image of a print online without contacting the print, and the chromatic aberration of the color lump is calculated. The accuracy and efficiency of detection are improved greatly. A method of performing color detection directly according to print content is further provided. According to the method, after an LAB image of a print is obtained, the LAB value of a detection area of a color group in an LAB image of a color detection area is acquired, and then, the chromatic aberration of the color group is calculated according to the LAB value and a preset standard template. The method is of wider applicability and higher efficiency. More monitoring projects can be obtained according to the chromatic aberration of the color group, and better real-time monitoring of the color printing condition is achieved.

Description

technical field [0001] The invention relates to the technical field of printing, in particular to a method and device for detecting the color of printed matter. Background technique [0002] The traditional printed matter color detection is an off-line method, which is observed by trained testers with human eyes, or with a color detection instrument that is in contact with the printed matter. Only the color deviation of a certain point can be detected each time, and the entire format of the printed matter cannot be detected in real time. To detect, the detection efficiency is not high. [0003] At present, machine vision inspection equipment can be used for online color inspection of printed products. This method is often to establish a comparison template along the printing movement direction to detect color defects of printed products obtained at different printing times relative to the comparison template. The color uniformity of the printed matter is detected in the dir...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T7/00G06T7/90
Inventor 杨艺王文龙姚毅刘士清陈昌陶
Owner BEIJING LUSTER LIGHTTECH
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