3. The image processing apparatus according to claim 1 , wherein the foreground map generation unit uses a model-based algorithm to generate a rough saliency map with an accuracy lower than that of the final saliency map obtained by the saliency map generation unit, and generates the foreground map based on the rough saliency map.
3. The image processing apparatus according to claim 1 , wherein the foreground map generation unit uses a model-based algorithm to generate a rough saliency map with an accuracy lower than that of the final saliency map obtained by the saliency map generation unit, and generates the foreground map based on the rough saliency map. 5. The image processing apparatus according to claim 3 , wherein the foreground map generation unit uses a dark-channel index indicating saliency measures that increase as pixels darken, as one index for evaluating the saliency measure of a pixel or a super-pixel in the rough saliency map.