CLASSIFICATION OF NATURAL TEXTURES BY MEANS OF 2-DIMENSIONAL ORTHOGONAL MASKS - COMMENTS

作     者：UNSER, M 

作者机构：Biomedical Engineering and Instrumentation Program National Institutes of Health DHHS Bethesda MD USA 

出 版 物：《IEEE TRANSACTIONS ON SIGNAL PROCESSING》 (IEEE Trans Signal Process)

年 卷 期：1991年第39卷第4期

页      面：1005-1006页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 

主　　题：Signal processing algorithms Speech processing Biomedical signal processing Frequency estimation Spectral analysis Inspection Prediction algorithms Algorithm design and analysis Biomedical engineering Instruments 

摘      要：The correspondence of Cohen et al. describes a texture analysis method that is a special use of the approach reported in [3]. Moreover, the derivation of the optimum set of masks presented by these authors is based on an incorrect assumption;the correct solution should be the local Karhunen-Loeve transform which is generally different from a 2 x 2 Hadamard transform (2 x 2 DHT). However, this error has relatively minor effects from a practical point of view since the ability of the 2 x 2 DHT to decorrelate real texture images is usually excellent.