液态水传输域的图像特征及表征

Image characteristics and characterization of liquid water transport domain

液态水在织物中的传输性能对服装的穿着舒适性有着重要影响。利用机器视觉记录液态水在织物表面的传输过程,利用数字图像处理技术对液态水在织物中的传输行为进行分析,提出了传输域几何特征的精确测量算法。首先,分析液态水传输域,发现其存在“椭圆”“单向”和“十字”等形状,其图像由织物表面纹理、吸水水印和液态水表面反光3部分叠加构成;其次,通过减运算、二值化处理和形态学处理解决了织物纹理产生的噪声问题和光源产生的反光问题,提取了织物表面传输域的几何特征;最后,对6种织物进行实验测试,得到了织物表面最大传输域的面积、周长、长和宽,获得了传输域面积的时变曲线,探讨了传输域几何特征与织物结构参数的关系,验证了方法的有效性。

The transmission performance of liquid water in the fabric has an important influence on the wearing comfort of clothing.In the research,machine vision is used to record the transmission process of liquid water on the surface of the fabric,image processing technology is used to analyze the transmission behavior of liquid water in the fabric,and an accurate measurement algorithm for the geometric characteristics of the transmission domain is proposed.Firstly,by analyzing the liquid water transport domain,it is found that it has features such as“ellipse”,“one-way”and“cross”.The image is composed of three parts:fabric surface texture,water absorption watermark and liquid water reflects ligh on its surface.Secondly,the noise problem caused by fabric texture and the reflection problem caused by light source are solved by subtraction,binarization and morphology,and the geometric features of fabric surface transmission domain are extracted.Finally,through experimental tests on six kinds of fabrics,the largest fabric surface is calculated.The area,perimeter,length and width of the transmission domain are obtained by acquiring the time-varying curve of the transmission domain area,and the relationship between the geometric characteristics of the transmission domain and the fabric structure parameters is explored,and the effectiveness of the method is verified.