Method for extracting variable code region

Abstract

The invention discloses a method for extracting a variable code region, which is used for extracting the variable code region in a surface image of a printed product, and is particularly suitable forthe condition that the surface of the printed product to be detected contains a large number of densely distributed variable codes. According to the method, the characteristic difference between the form of the variable code and other complex background patterns is analyzed, and then all bar code, QR and DM variable code areas contained on the surface of the printed product are extracted accordingto the form characteristics of the variable code, and the form characteristics comprise edge characteristics, area characteristics, corner point characteristics and the like. Compared with an existing method for manually drawing a variable code area, the method is simple; according to the method for extracting the variable code area, the form characteristics of the variable code are considered, the variable code area is obtained through automatic extraction according to the difference between the form characteristics, the operation stability and usability of variable code detection software are improved, the modeling efficiency is remarkably improved, and meanwhile, the expenditure of manpower and time is greatly reduced.

Description

technical field [0001] The present application relates to the technical field of image information positioning and recognition, and in particular to a method for extracting a variable code region. Background technique [0002] With the popularization of terminal equipment such as computers and smart phones, variable codes, as an efficient information carrier, have been widely used in the fields of tobacco and wine, food, medicine, electronic products, item identification, and logistics tracking. Commonly used variable codes include barcodes and two-dimensional codes, wherein two-dimensional codes include QR (Quick Response) codes and DM (Data Matrix) codes. [0003] For the variable code printed on the surface of the printed matter, it is necessary to carry out quality inspection on the variable code on the surface of the printed matter to detect unrecognizable or repeated variable codes, so as to ensure the accuracy of the variable code. When performing variable code quali...

AI Technical Summary

Problems solved by technology

[0005] This application provides a method for extracting a variable code area to solve the problem that the existing variable code area positioning process needs to be completed manually, which increases the workload of the operator and increases the complexity of the quality inspection process, resulting in variable codes. Time-consuming and labor-intensive problems in the quality inspection process

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