基于机器视觉的棉花颜色检测方法  

Cotton color detection method based on machine vision

作　　者：白恩龙 张周强 郭忠超 昝杰 BAI Enlong;ZHANG Zhouqiang;GUO Zhongchao;ZAN Jie(School of Mechanical and Electrical Engineering,Xi′an Polytechnic University,Xi′an,Shaanxi 710600,China;Shaanxi Provincial Key Laboratory of Functional Garment Fabrics,Xi′an Polytechnic University,Xi′an,Shaanxi 710600,China)

机构地区：[1]西安工程大学机电工程学院,陕西西安710600 [2]西安工程大学陕西省功能性服装面料重点实验室,陕西西安710600

出　　处：《纺织学报》2024年第3期36-43,共8页Journal of Textile Research

基　　金：国家自然科学基金青年科学基金项目(61701384);陕西省教育厅重点科学研究计划项目(20JS051);西安工程大学柯桥纺织产业创新研究院项目(19KQYB03);陕西省自然科学基础研究计划项目(2023-JC-YB-288)。

摘　　要：针对国内目前通过图像处理测量棉花颜色等级方法较少的现状,设计了一种基于机器视觉的棉花颜色检测方案。为提高棉花样本的拍摄质量及高效性,使用Halcon软件连接CMOS工业相机进行实时采集。首先对采集的棉花样本图进行预处理,通过阈值分割算法将棉花样本图转化为二值图像,且使用高斯滤波去噪声从而去除棉花中的杂质信息,并对预处理后的图像进行区域划分。然后通过RGB值转换为CIE XYZ颜色空间值,得到各子区域棉花颜色参数值,并引入K均值算法聚类各子区域颜色值以确定棉花最终颜色参数值,从而确定棉花颜色等级。最后通过实验验证及数据分析,将本文检测方法与MCG-1棉花检测仪器检测结果进行对比,结果表明2种方法检测结果一致;并通过在不同时间下持续对棉花样本进行数据检测,验证了本文方法的稳定性和精确性。本文检测方法可行且检测成本较低,可代替昂贵的仪器检测方法供企业使用。Objective At present,most of the domestic cotton testing instruments are adopted to detect cotton grades,but the specifications of instruments and equipment are expensive and cannot be used in a wider range.At present,fewer methods of using machine vision are adopted to detect the color grade of cotton,and the accuracy is not high.Therefore,in view of the above situation,a cotton color grade detection method based on machine vision was designed.Method An experimental platform was firstly built.The light source was fixed to the aluminum profile frame and sealed.Cotton was collected in real time through a camera connected to a computer.The collected cotton sample image was transmitted to a computer and preprocessed,and the preprocessed image was cropped using Halcon software and divided into subregions.The albedo(Rd)and yellowness(+b)values of each subregion were calculated by the conversion of color space values,and the color value of each subregion was clustered by the K-means algorithm to obtain the color average of the overall image of cotton.Finally,it was compared with the national standard cotton color grade map to determine the final grade of cotton.Four different color grades of cotton were selected for impurity removal and non-impurity treatment,and the color parameters obtained after impurity removal and without impurity removal were calculated by Halcon software.For the same impurity removed cotton,the Rd value and+b value was calculated,and compared with the detection of MCG-1 detection instrument,the detection results were counted,and scatter plotted by using Origin software to observe the linear relationship between the two detection methods.In order to explore the stability of the test results under different durations,cotton was continuously tested in the time periods of 0 h,12 h,24 h,and 36 h in the same environment under the condition that the equipment was not turned off and the lights were not turned off.Finally,in order to explore whether the overall color value of cotton can represent the col

关 键 词：棉花 颜色检测 机器视觉 阈值分割 区域划分 K均值算法 颜色等级 

分 类 号：TS111.9[轻工技术与工程—纺织材料与纺织品设计]