Figure 2From: Hand contour detection in wearable camera video using an adaptive histogram region of interestIllustration of the hand contour determination process. a) Selection of the histogram region corresponding to the hand. A rectangular region is first identified in the Hue-Saturation histogram, based on the local maximum closest to the seed point colour (top). A flood-fill algorithm is used to refine the histogram ROI (middle), and all bins outside of this region are set to 0 (bottom). b) Backprojection of the HSV image using the reduced histogram shown at the bottom of a) (top), and resulting hand contour superimposed on the original image (bottom).Back to article page