Wavelet Analysis Theory Ball In The Objective Assessment Of Fabric Pilling

Evaluate the textile pilling grade is an important thing of textile testing fields. The common way we use is to judge the grades according to the standard sample, but it is greatly subjective and will produce different results among different people. It is difficult for us to precisely and quantificationally describe the amount of pilling.Based on the method of wavelet transform which has the feather of multi-resolution and provides itself with the capability of describing part information of sigma in the domain of time and frequency, we develop a set of fabric pilling image processing system.By use the functions of the wavelet tool box, the fabric pilling image are realized the decomposition and de-noising and reconstruction, the threshold are make accurate by Birge-Massart strategy. By the means selecting suitable threshold, the target and background are preferably separated, and the image only consists of pilling was left. To obtain the characteristic parameters from the pilling image and select the most sensitive parameters; according to the principal of matching standard sample, by the least distance discriminant to evaluate the amount of pilling, we achieve the the objective evaluation of the fabric pilling image.The experimentation indicate that the objective evaluation correspondent with the manual discriminant. The subject will introduce the image processing technique into the textile field, evaluating the amount of pilling by image processing technique and has some impacts on the objective and automation evaluation of the amount of pilling.