纺织学报 ›› 2020, Vol. 41 ›› Issue (05): 45-49.doi: 10.13475/j.fzxb.20190704106

• 纺织工程 • 上一篇    下一篇

基于亚像素边缘检测的纱线条干均匀度测量

张缓缓, 赵妍, 景军锋, 李鹏飞   

  1. 西安工程大学 电子信息学院, 陕西 西安 710048
  • 收稿日期:2019-07-15 修回日期:2020-01-17 出版日期:2020-05-15 发布日期:2020-06-02
  • 作者简介:张缓缓(1986—),女,讲师,硕士。主要研究方向为图像处理、模式识别。E-mail: zhanghuanhuan0557@163.com
  • 基金资助:
    国家自然科学基金项目(61902302);陕西省高校科协青年人才托举计划项目(20180115);陕西省教育厅科研计划项目(18JK0338);西安工程大学研究生创新基金项目(chx2019018)

Yarn evenness measurement based on sub-pixel edge detection

ZHANG Huanhuan, ZHAO Yan, JING Junfeng, LI Pengfei   

  1. School of Electronic and Information, Xi'an Polytechnic University, Xi'an, Shaanxi 710048, China
  • Received:2019-07-15 Revised:2020-01-17 Online:2020-05-15 Published:2020-06-02

摘要:

为了精确地评价纱线的表观条干均匀性,提出一种基于亚像素边缘检测的纱线条干均匀度检测方法。首先通过图像采集装置获取纱线图像;然后对纱线图像进行亚像素边缘检测获取纱线边缘点集;利用开运算对获取的边缘点集进行处理,进而获得纱线条干的边缘;最后采用坐标直方图方法计算纱线平均直径和条干CV值。为验证方法的有效性和准确性,对多种不同线密度的纯棉纱线进行测试,并将测试结果与电容式条干仪的均匀度检测及基于模糊C均值分类和Otsu图像法的检测结果进行了对比。结果表明:基于亚像素边缘检测的纱线条干均匀度检测方法与电容式的测量结果有着较好的一致性,证明所提方法可得到准确的结果。

关键词: 纱线条干, 均匀度, 亚像素边缘检测, 纱线质量评价, 条干CV值

Abstract:

In order to evaluate accurately yarn evenness, a yarn evenness measurement method based on sub-pixel edge detection was proposed. In this process, a yarn image was acquired firstly by using an image acquisition device, after that yarn edge points were acquired by sub-pixel edge detection of yarn image. Then, the yarn edge points were processed by the mathematical opening operation, and yarn evenness edges were obtained. Consequently, the average yarn diameter and evenness CV value were calculated by using the coordinate histogram method. In order to verify the validity and accuracy of the method, cotton yarns with different linear densities were tested, and the test results were compared with the results of uniformity test using the capacitive evenness tester and with the test results obtained by using the fuzzy C-means algorithm and Otsu image method. The results of the comparisons show that the yarn evenness measurement method based on sub-pixel edge detection is in good agreement with the capacitance measurement results, which proves that the proposed method can obtain accurate results.

Key words: yarn evenness, uniformity, subpixel edge detection, yarn quality evaluation, CV value

中图分类号: 

  • TP391.4

图1

纱线采集装置"

图2

纱线原始图像"

图3

算法框图"

图4

初始情况"

图5

二阶亚像素边缘检测原理图"

图6

二维边缘点集提取过程"

图7

纱线条干提取过程"

图8

纱线条干横向切分过程"

表1

横向提取不同坐标点个数CV值对比"

纱线线
密度/tex
条干仪
检测
本文算法
5个 10个 20个 50个
27.8 12.60 11.28 12.79 13.12 13.34
18.2 11.11 10.79 11.48 12.58 13.65
14.5 12.22 12.06 12.59 11.24 12.22

图9

纱线直径对比图"

表2

多种方法的纱线条干CV值对比"

纱线线
密度/tex
纱线条干CV值/%
条干仪 本文
算法
灰度
投影
FCM Otsu
27.8 12.60 13.29 13.64 14.91 15.76
18.2 11.11 11.98 12.57 13.16 13.79
14.5 12.22 13.09 13.06 13.79 15.96
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