Computer vision based cigarette carton and box packing paper dimension measurement method

Abstract

The invention discloses a computer vision based cigarette carton and box packing paper dimension measurement method. The method is characterized in that structured light is projected on the surface of a measured object by the aid of a structured light generator, the structured light forms modulated structured light as being subjected to modulation of surface topography of a sample to be measured, the structured light is subjected to imaging by a camera to obtain a digital image of the measured object, three-dimensional topography and to-be-measured information of the measured object are extracted from the digital image of the measured object according to a computer vision algorithm and an image processing method, dimensional measurement of the measured object is realized, and the measured object is cigarette carton or cigarette box packing paper. By the method, contactless automatic measurement of cigarette carton and box packing paper dimensions is realized, personal error is reduced effectively, and measurement precision and efficiency are improved.

Description

technical field [0001] The invention relates to a method for measuring the size of cigarette rods and box packaging paper based on computer vision. Background technique [0002] The measurement of cigarette rod and box wrapper size includes length, width, flatness, die-cut size, indentation depth, indentation width and other dimensions. YC / T 330-2009 "Cigarette Rod and Packing Paper Printed Matter" defines "cigarette stick wrapping paper printed matter" as "cigarette stick wrapping paper printed with patterns and text"; "box wrapping paper printed matter" as "printed pattern, text Cigarette box wrapping paper"; "die-cutting" means "the process of cutting the printed matter into the required shape with a mold"; "cutting" means the "process of cutting the printed matter according to the required size"; The process of embossing line marks on printed matter by molds". Therefore, cigarette carton wrapping paper is basically irregular in shape, and it is difficult to measure the...

AI Technical Summary

Problems solved by technology

Therefore, cigarette carton wrapping paper is basically irregular in shape, and it is difficult to measure the external dimensions of this type of wrapping paper. Tools are difficult to measure accurately

[0003] At present, the measurement of the size of cigarette rods and box wrappers basically adopts manual measurement, using a ruler to measure the length, width and arc radius of cigarette rods and box wrappers, and using a protractor to measure the angle of irregular edges, but such The manual method has low precision and is greatly affected by human factors; at the same time, since the operator must touch the sample to be tested during the measurement process, it is easy to cause a certain deformation of the sample and thus affect the measurement accuracy

In addition, for strip and box packaging paper with complex shapes, manual measurement is very cumbersome, the test efficiency is low, and the indentation depth and flatness of the paper cannot be accurately measured.

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