Method and system for detecting symmetry of printed matter

A technology for symmetry detection and printing, applied in image analysis, image enhancement, instruments, etc., can solve the problems of inaccurate printing, real-time detection and control, etc., and achieve strong robustness, improve detection efficiency and economic benefits Effect

Active Publication Date: 2017-06-27
WUHAN UNIV
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to make full use of digital image processing and recognition technology, fully tap its practical value, and make it effectively serve the printing industry, this invention provides a technical solution for printing symmetry detection, which aims to solve the current situation where there are no measurement and control conditions at home and abroad Under the current situation, it is not possible to automatically and real-time detect and control the defects such as inaccurate registration of printed matter

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and system for detecting symmetry of printed matter
  • Method and system for detecting symmetry of printed matter
  • Method and system for detecting symmetry of printed matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049] In order to make the object, technical solution, and work flow of the present invention clearer, the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0050] The method provided by the invention can adopt computer software technology to realize the automatic operation process. In this embodiment, the tipping paper overprinting hot stamping logo is taken as an example for illustration, and other types of paper and logos are processed in the same manner during specific implementation. Such as figure 1 As shown, the embodiment uses the tipping paper image data to process the specific implementation process as follows:

[0051] Step 1. Real-time image preprocessing: grayscale processing is performed on the image of the printed matter to be inspected obtained in real time to obtain a grayscale image. Subsequent steps are performed based on the grayscaled real-time image. Obtaining printed matter ima...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

A printed matter symmetry detection method and system, including real-time image preprocessing, determining the position of the edge of the paper in the image, determining the distance from the edge of the marked area to the edge of the paper and the width of the marked area, and determining the start position of the entire cycle of the upper left and lower right marking features, Then the symmetry analysis is performed on the left and right regions of interest, including calculating the symmetry measure and judging the symmetry defect. The invention provides a real-time detection scheme for overprinting products, one of which is fast and can achieve the effect of real-time processing, and the other is strong robustness. Based on the above two characteristics, in the actual production process, the present invention can be used to perform real-time detection, screen out unqualified products in time, and improve detection efficiency and economic benefits.

Description

technical field [0001] The method belongs to the technical field of image processing and recognition, and in particular relates to a method and system for detecting the symmetry of a printed matter. Background technique [0002] Due to the imperfect printing technology and some unavoidable random factors, defects such as blurred text, missing printing, scratches, and inaccurate registration often appear during the printing process. Taking tipping paper overprinting as an example, the hot stamping edge and hot stamping characters of tipping paper are sequential processes, and machine or human factors may cause overprint deviation, which is specifically manifested as the deviation of the upper, lower, left, and right positions between the gold edge and the paper edge, and the text and the gold edge; In the tipping paper, there are often defects such as missing printing of gold edges, false bronzing of text, lack of pens and strokes, and blurred text printing. For such defects...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/32G06T7/68
CPCG06T7/0006G06T7/68G06T2207/30176G06V10/25
Inventor 黄玉春王敬磊彭斌贺健
Owner WUHAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap