Figure 1

Illustration of problems in existing methods. (a) ; (b) ; (c) ; (d) left difference image edge map; (e) right difference image edge map; (f) scattered moving edges obtained from exact matching of left and right difference image edge maps; (g) moving edges obtained using more than three consecutive frames; (h) moving edges obtained allowing some distance threshold during matching; (i) edges expected to be extracted for moving object in ; (j) edges of left difference image edge map within the region of moving object in ; (k) edges of left and right difference image edge maps within the region of moving object in ; (l) missing of moving object region in three-frame based method due to region homogeneity.