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Illustration of statistical texture feature extraction. (a) Segmented tumor image (b) Segmented tumor image quantized to four intensity levels (c) First order statistical features corresponding to first order histogram (d) Higher order statistical features corresponding to 1. GLCM (gray level co-occurrence matrix), 2. GLRLM (gray level run length matrix) and 3. NGTDM (neighborhood gray tone difference matrix). Data from16.
