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216 4 Feature detection and matching

Figure 4.33 Combined brightness, color, texture boundary detector (Martin, Fowlkes, and Malik 2004) c 2004
IEEE. Successive rows show the outputs of the brightness gradient (BG), color gradient (CG), texture gradient
(TG), and combined (BG+CG+TG) detectors. The final row shows human-labeled boundaries derived from a
database of hand-segmented images (Martin, Fowlkes, Tal et al. 2001).