Visual detection method for transparent paper defect of outer package of strip cigarette

Abstract

The invention discloses a visual detection method for the transparent paper defect of the outer package of a strip cigarette, which aims to improve the efficiency of visual detection for the transparent paper defect of the outer package of the strip carton The method comprises the following steps: performing gray scale transformation on the shot digital image of the strip cigarette, filtering to remove noise and performing pretreatment on the image; performing edge detection on the pretreated image and extracting an edge image; performing binaryzation treatment on the edge image, performing gray value statistics in the horizontal and vertical directions by using a projection method, and extracting the boundary of the strip carton image to realize separation of the strip cigarette image; calculating similarity between the separated strip cigarette image and a template image, and setting a judgment threshold; and finally comparing the similarity value and the threshold to determine whether the strip cigarette image is qualified, extracting a pixel image of the defect part of the unqualified strip cigarette image by using a difference image method, and counting the pixel value which is taken as the pixel area of the defect part.

Description

Technical field [0001] The invention relates to a visual detection method for defects of transparent paper on outer packaging of cigarette sticks, and belongs to the field of computer vision. Background technique [0002] With my country's accession to WTO, the improvement of people's living standards, and the internationalization of domestic competition, transparent paper packaging is widely used in cigarettes, food, pharmaceuticals, printing and packaging, and other enterprises. Especially in cigarette companies, consumers have put forward more comprehensive requirements for the quality of cigarette products, not only requiring good internal quality, but also requiring exquisite appearance and packaging. The transparent paper outer packaging can play the role of moisture-proof and beautiful, but it is easy to be scratched during the production process, resulting in packaging defects. The traditional method of detecting the quality of stick cigarette packaging is to use op...

AI Technical Summary

Problems solved by technology

The transparent paper outer packaging can play the role of moisture-proof and beautiful, but it is easy to be scratched during the production process, resulting in packaging defects

The traditional method of detecting the quality of stick cigarette packaging is to use optical fiber sensors or displacement sensors to detect the sticks, but they are not perfect. They can only detect specific parts of the sticks, and cannot effectively detect the transparent paper of the sticks. Outer packaging defect area

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