With the development of society, enterprises have higher and higher requirements for the quality of objects, and the label quality inspection system based on image processing has been paid more and more attention.

However, in the label production process, due to the influence of the precision of production machines and other factors, the labels produced have many quality problems, such as: less printing

Therefore, label defect detection is becoming more and more important

This paper mainly focuses on the software of label visual inspection system. Subtract the detected image from the standard image, so as to extract the defective part and solve the problem of less printing of labels.

The whole detection process of less printing defects does not need manual labor and laborious comparison, and this process is handled by the software itself. People only need to confirm the detected labels, so as to realize the perfect combination of manual work and intelligence and ensure the quality of labels.