A method for automatic detection of registration deviation of color printed matter

A registration deviation and automatic detection technology, applied in printing, printing machines, general parts of printing machinery, etc., can solve problems such as low speed and low precision, improve detection accuracy, reduce analysis difficulty, and improve detection speed and accuracy Effect

Active Publication Date: 2011-12-14
烟台市裕同印刷包装有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for automatic detection of registration deviation of color prints, which solves the problems of low speed and low precision in the detection of registration deviation in the prior art due to the complex color separation process

Method used

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  • A method for automatic detection of registration deviation of color printed matter
  • A method for automatic detection of registration deviation of color printed matter
  • A method for automatic detection of registration deviation of color printed matter

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Embodiment 1

[0045] A method for automatic detection of registration deviation of color printed matter, which is specifically implemented through the following steps:

[0046] Step 1, place the designed registration mark image on a certain edge position of the printed image to be printed, and print it together, and use it as the design original to print the standard printed matter and the printed matter to be tested; figure 2 As shown, the registration mark is composed of four solid circles of cyan (C), magenta (M), yellow (Y) and black (K) arranged at a certain distance, and are respectively composed of cyan, magenta, and yellow , and black are printed on four printing plates, and the color values ​​of the four solid circles are: cyan is (C100M0Y0K0), product is (C0M100Y0K0), yellow is (C0M0Y100K0), black is (C0M0Y0K100);

[0047] Step 2: Use a color line-scan camera to capture the printed standard printed matter image, and use the human-computer interaction method to drag multiple recta...

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Abstract

The invention discloses a method for automatically detecting the registering deviations of color printed matters. The method comprises the following steps: firstly, designing a set of registration marks capable of meeting the needs of automatic registration; then, respectively acquiring an image of a standard printed matter and an image of a printed matter to be detected by using a color linear array camera, selecting the registration mark area of each forme one by one on the image of the standard printed matter in an man-machine interaction mode, carrying out preprocessing on the registration mark area of each forme on the image of the standard printed matter and corresponding areas on the image to be detected, and through carrying out small neighborhood template match-searching, obtaining registering calibration parameters between the image of the standard printed matter and the image of the printed matter to be detected; and finally, selecting some forme as a reference forme, calculating the differences between the calibration parameter of the reference forme and the registering calibration parameters of other formes, and converting the differences into actual physical quantities, namely, the registering calibration data of other formes obtained through detection. The method disclosed by the invention is suitable to be applied to the detection on registering deviations in the process of carrying out multi-color overprint; and by using the method disclosed by the invention, the axial and circumferential registering deviations of each forme can be obtained quickly.

Description

technical field [0001] The invention belongs to the field of printing quality detection, and in particular relates to an automatic detection method for registration deviation of color printed matter. Background technique [0002] Color prints are usually overprinted with a variety of primary colors, and the registration accuracy of each color plate is an important indicator of the quality of color prints. When each color plate achieves accurate registration, the color print will show the best visual effect, but when there is a registration deviation of each color plate, the color print will have problems such as poor color effect and blurred pattern. [0003] The traditional detection method of registration accuracy of color prints is mainly manual detection, that is, the operator visually inspects the registration status of the registration standards of each color plate through a magnifying glass. However, manual detection has the disadvantages of low efficiency, low preci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41F33/00
Inventor 张二虎段倩丹
Owner 烟台市裕同印刷包装有限公司
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