A HYBRID ALGORITHM USING DISCRETE COSINE TRANSFORM AND GABOR FILTER BANK FOR TEXTURE SEGMENTATION

Gabor filters have been widely used for texture segmentation and feature extraction, however there are important considerations regarding filter parameters, filter bank coverage in the frequency domain and feature dimensional reduction. In this paper, a texture segmentation algorithm based on a hybrid filter bank is presented. The proposed method uses a Gabor filter bank and Discrete Cosine Transform (GDCT) to extract the optimal features for texture segmentation. To reduce the feature vector dimension a competitive network is trained to estimate the principal components of the extracted features. The feature vectors composing of both Gabor and DCT features are quantized by estimated eigen vectors. The proposed method enables the use of multiple filter banks or larger Jilter banks consisting of a higher number of channels