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A Template Registration Method for Multi-process Flexographic Print Inspection

A technology for template registration and printed matter, which is applied to measuring devices, material analysis through optical means, instruments, etc., can solve the problems of product image deformation, template set inaccuracy, etc., and achieve reduced process, rapid registration, and improved The effect of detection speed

Active Publication Date: 2018-01-19
BEIJING DAHENG IMAGE VISION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Aiming at the characteristics and difficulties of flexible printed matter detection, the present invention solves the problem of inaccurate template set due to the deformation of the photographed product image caused by local stretching and slight deformation

Method used

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  • A Template Registration Method for Multi-process Flexographic Print Inspection
  • A Template Registration Method for Multi-process Flexographic Print Inspection
  • A Template Registration Method for Multi-process Flexographic Print Inspection

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Embodiment Construction

[0060] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0061] The template registration method of the present invention is mainly divided into two stages, the template construction stage and the template registration stage.

[0062] Such as figure 1 A schematic flowchart of the template construction phase is shown. First, capture the image of the standard product; then, find and set the positioning group of the product base, for paper printed matter, it is to set the product paper layer positioning group. For example, if image 3 As shown, the paper layer positioning group may include two positioning core areas, and the two positioning core areas correspond to two diagonal points of the paper, and setting the product paper layer positioning group refers to determining the coordinates of the two positioning core areas.

[0063] Next, set up positioning groups for different color groups and diffe...

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Abstract

The invention provides a template registration method for multi-process flexible printed matter detection, the template registration method includes: a) obtaining a sample image of a standard product; b) determining a base positioning group and a process positioning group; c) obtaining The positioning template of the product; d) obtaining the image of the inspected product; e) determining the positioning results of each positioning group; f) using the calculated associated positioning results to perform affine transformation on two different detection areas. The template registration method of the present invention can realize rapid registration between the inspected product and the template, and achieve accurate registration without affecting the online production speed. By setting the positioning inheritance relationship, the present invention can reduce the process of large-area positioning core search and improve the detection speed, thereby meeting the industrial detection requirements.

Description

technical field [0001] The invention relates to the field of printed matter detection, in particular to a template registration method for multi-process flexible printed matter detection. Background technique [0002] At present, the printing quality inspection system captures product images through high-definition high-speed cameras, and generates inspection template images after a series of template training. In the online or offline production process, the image to be inspected is taken on the same platform, and then the image to be inspected is compared with the template image. Once the image to be inspected is found to be different from the template image, the system can find defects based on these different pixels position, size and type etc. In a high-speed, high-definition, wide-format printing quality inspection system, the inspection speed must be considered. How to quickly and accurately register is the difficulty of the inspection system. [0003] With the rapi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/956
Inventor 邓红丽刘凤龙白杨杨朱瑞慧王亚鹏潘津陈绍义杜戊房超蔡文超
Owner BEIJING DAHENG IMAGE VISION
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