MODIFIED HOUGH TRANSFORMS FOR FEATURE RECOGNITION ON DEFORMABLE PATTERNED MATERIALS

This paper reports on the use of a modified Hough transform, particula rly its generalized version (GHT). The purpose of the analysis is to r ecognize features on deformable patterned materials, particularly elas ticated textile fabrics such as lace. To cope with arbitrary geometric distortion of the features to be found, a feature is divided into sev eral sub-features and the model of the feature is built by choosing a set of points s from these sub-features instead of boundary points. Th e method is tested on a pattern stretched by up to 20% in one directio n, with or without a moderate degree of pattern skew.