Figure 2

Tracking results of the KCF algorithm (first column) and paper algorithm (second column) in different situations. In all images, the rectangular box is the frame target position at the end of tracking, and the red point is the two-dimensional centroid of the cabbage butterfly. (a) Case of target flying in the middle of the wind tunnel. (b) Case of obscured target. (c) Case of target at edge of wind tunnel. (d) Case of similar colours for target and background.