Abstract: Texture classification is widely used in the fields of medical image analysis etc., as for image rotation caused by factors such as the angle changing during the process of texture image capturing, a method of texture classification based on Angular Radial Transform (ART) is proposed, which is rotationinvariant. Firstly, the ART method is used for image feature extraction to obtain the angular feature vectors and the radial feature vectors, respectively. Then the two extracted feature vectors are combined as a whole. Finally, the K-nearest neighbor feature space distance method is applied for texture classification. Brodatz texture library images are selected for texture classification test. Experimental results show that the proposed algorithm has a good effect on rotation-invariant texture classification.

Key words: Angular Radial Transform（ART）, feature vectors, feature extraction, rotation-invariant, texture classification