Video Saliency Modulation in the HSI Color Space for Drawing Gaze

We propose a method for drawing gaze to a given target in videos, by modulating the value of pixels based on the saliency map. The change of pixel values is described by enhancement maps, which are weighted combination of center-surround difference maps of intensity channel and two color opponency channels. Enhancement maps are applied to each video frame in the HSI color space to increase saliency in the target region, and to decrease that in the background. The TLD tracker is employed for tracking the target over frames. Saliency map is used to control the strength of modulation. Moreover, a pre-enhancement step is introduced for accelerating computation, and a post-processing module helps to eliminate flicker. Experimental results show that this method is effective in drawing attention of subjects, but the problem of flicker may rise in minor cases.