Abstract: At present the evaluation of fabric spray test rely on human’s eyes to make a judgment, which is easily affected by subjective factors. So the result of the subjective evaluation is not favorable. Aiming at this, this paper will study how to evaluate fabric spray test objectively. First, twenty-four common fabrics were subjected to spray test. Then they were evaluated subjectively according to the AATCC standard photos and taken pictures. After that, MATLAB was used to process the images of fabric spray test. The procedures include: transfer the colored image into gray one, histogram equalize, median filter, edge detection, corrosion and expansion, as a result of which, wet area and test area were extracted. Finally, the fabrics were carried out objective evaluation in accordance with the wet area ratio of each grade in AATCC standard photos. It was indicated that the objective evaluation of fabric spray test based on image processing was consistent with subjective evaluation. It was feasible to evaluate objective the grade of fabric spray test using image processing method.

Key words: fabric, wettability, objective evaluation, wet area ratio, image processing