Abstract
Seam puckering is the most important factor in sewing process. The evaluation method for seam puckering, however, has not been fully established. The evaluation should accord with the subjective one. A measurement system with a laser displacement meter was constructed for quantitative evaluation of puckering. The 3-dimensional shape of fabric surface was measured precisely by this system. The pucker of two groups of samples was measured by this system. At the same time a consumers' group evaluated the same samples and classified them into five grades. The evaluation pattern was different for each person. Discriminant analysis was used for objective evaluation of seam puckering. Logarithmic power spectra were calculated for each sample. Both the area of measurement and the frequency band of the pucker were divided into three parts. Logarithmic power spectra were summed up in each divided area and each frequency band. After all, nine valuables were obtained and used for discriminant analysis. More than 70% of predictions by the analysis agreed with the evaluation by consumers.
