Figure 2. (a) 600 x 600 pixel region of interest (ROI) containing a microcalcification (MC) cluster in the original mammogram (DDSM: volume cancer_09, case B_3406, RIGHT_CC). (b) Processed ROI with delineated MC cluster area. (c) Surrounding tissue ROI (ST-ROI). (d) Magnified 128 x 128 pixel subregion of ST-ROI.