Measuring Structural Parameters of Knitted Fabrics by Digital Image Processing Techniques  

作　　者：宋广礼 陈莉 

机构地区：[1]School of textile and clothing, TianJin Polytechnic University, TianJin 300160

出　　处：《Journal of Donghua University(English Edition)》2005年第4期58-62,共5页东华大学学报（英文版）

摘　　要：In the knitting industry the measurements of the stitch density and the stitch length are usually done manually, which may lead to lower efficiency and less definition and also bring subjective ideas into the test results. In order to improve the effect we can measure with Digital Image Processing Techniques. A piece of sample is scanned into computer and changed into a digital image, which is processed with media filtering. To acquire the power spectrum, the image in the spatial domain is converted into the frequency domain. Picking up the characteristic points describing the stitch density and the stitch length separately in the power spectra and reconstructing them, the values of the stitch density and the stitch length could be calculated. When measuring the stitch length, we should establish a geometric model of the stitch based en the digital image processing, which provides a method to transform the stitch length in the two-dimensien space into the three-dimensien space and to measure the value of the stitch length more accurately. This method also provides a new way to measure the stitch length without damaging the fabric.In the knitting industry the measurements of the stitch density and the stitch length are usually done manually, which may lead to lower efficiency and less definition and also bring subjective ideas into the test results. In order to improve the effect we can measure with Digital Image Processing Techniques. A piece of sample is scanned into computer and changed into a digital image, which is processed with media filtering. To acquire the power spectrum, the image in the spatial domain is converted into the frequency domain. Picking up the characteristic points describing the stitch density and the stitch length separately in the power spectra and reconstructing them, the values of the stitch density and the stitch length could be calculated. When measuring the stitch length, we should establish a geometric model of the stitch based on the digital image processing, which provides a method to transform the stitch length in the two-dimension space into the three-dimension space and to measure the value of the stitch length more accurately. This method also provides a new way to measure the stitch length without damaging the fabric.

关 键 词：Weft knitted fabrics stitch density stitch length digital image processing two-dimension Fourier transformation geometric model of the stitch. 

分 类 号：TS187[轻工技术与工程—纺织材料与纺织品设计] TP391.41[轻工技术与工程—纺织科学与工程]