Application of Image Technology in Printing Inspection (I)

Abstract: First, the key parts, applications and advantages of machine vision technology and its system are introduced. Second, it introduces its application in the printing quality inspection system. Finally, it introduces the application of the banknote printing quality inspection process.

Keywords: machine vision; print quality inspection; location; analysis and identification

The image is the main component of the print, and the image detection technology naturally becomes a key technology for print detection. In view of this, this paper first introduces the key parts, applications and advantages of machine vision technology and its system. Second, it introduces its application in the printing quality inspection system. Finally, it introduces the application of the banknote printing quality inspection process.

一、Introduction to machine vision

Machine vision is an interdisciplinary discipline involving artificial intelligence, neurobiology, psychophysics, computer science, image processing, and pattern recognition. It is not only an extension of the human eye, but more importantly, it has some functions of the human brain. In recent years, with the maturity of computer technology, especially multimedia technology and digital image processing and analysis theories, and the rapid development of large-scale integrated circuits, machine vision technology has been widely applied in product identification and industrial online detection. Great economic and social benefits have been achieved.

1. The key part of the machine vision system

A, machine vision products; B, captured targets; C, image signals; D, various image processing operations; E, image features; F, discriminant results; G, automatic control

Figure 1 General process of machine vision system

2. Application scope of machine vision system

Widely used in conditions monitoring, finished product inspection and quality control. The machine vision system improves the flexibility and automation of production. Using machine vision inspection methods can greatly increase production efficiency and automation of production.

3. The advantages of machine vision

a. Machine vision is based on objective analysis and reasoning. It effectively avoids the subjectivity and individual differences brought about by manual inspection and improves the detection accuracy.

b. can increase the detection speed.

c. Short-term investment, but the average cost of long-term use is lower than manual detection. In particular, with the continuous development of related technologies, the speed of detection has rapidly increased, and the cost of testing has continued to decline.

d. Facilitate the storage, processing and statistical analysis of test data to provide suggestions and guidance for the follow-up production of the product.

Second, the application of printing quality inspection system

1. The main application in printing inspection

a. Banknote printing quality inspection application

b. Film printing quality inspection application

c. cloth printing quality inspection application

d. Floor tile printing quality inspection application

e.Paper printing quality inspection application

f. . . . . .

2. Typical application of banknote printing inspection

a. Banknote quality inspection

b. Offset online and offline inspection

c. Gravure online inspection

d. Large sheet quality inspection

e. Large bill counting

f. Single opening notes counting

g.. . . . . .