Yarn evenness three-dimensional modeling calibration method based on inscribed circle

Abstract

The invention relates to the field of yarn quality detection methods, in particular to a yarn evenness three-dimensional modeling calibration method based on an inscribed circle. The method comprises: collecting a multi-view image of a target object on one image by means of a double-plane mirror continuous reflection principle; extracting a stem part through open operation, expansion processing, adjacent pixel gray value comparison and a maximum connected region extraction method; and drawing a circle with yarn evenness width in each sub-graph as the diameter, adjusting the position of the circle center by using a biplane mirror imaging principle, respectively finding out the internally tangent points of the circle drawn with the virtual image evenness width of the target object as the diameter and the circle drawn with the real image evenness width of the target object as the diameter, selecting a proper arc in each circle on the basis to be fitted into heteromorphic graphics, and combining all the special-shaped figures to complete reconstruction of the yarn evenness three-dimensional model. According to the yarn evenness data obtained based on the method, the yarn evenness uniformity is accurately measured, and the real situation of the yarn evenness is reflected.

Description

technical field [0001] The invention relates to the field of yarn quality detection methods, in particular to a method for three-dimensional modeling and calibration of yarn lines based on inscribed circles. Background technique [0002] The evenness of evenness is an important index to characterize the performance of the yarn. The unevenness of the yarn is divided into short-segment unevenness, middle-segment unevenness and long-segment unevenness. When weaving with yarns with high unevenness in short segments, the probability of several thick places or details juxtaposed on the cloth surface is relatively high, which is prone to fabric surface defects; Obvious horizontal stripes also have a greater impact on the cloth surface; relatively speaking, the chance of defects on the cloth surface is slightly lower when the yarn with uneven middle segments is woven, and it is related to the cloth width. When there is a certain multiple relationship, it will appear obvious defect....

AI Technical Summary

Problems solved by technology

However, the traditional yarn evenness test method cannot directly reflect the shape and structure characteristics of the yarn, and cannot fully characterize the evenness of the yarn.

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