4. The method of claim 3 , wherein the labeling further comprises: determining if each pixel in the image represents an edge; estimating distribution of edge density in a neighborhood of the each pixel in the image; and using the distribution to determine a descriptive type of each pixel and labeling each pixel accordingly.
4. The method of claim 3 , wherein the labeling further comprises: determining if each pixel in the image represents an edge; estimating distribution of edge density in a neighborhood of the each pixel in the image; and using the distribution to determine a descriptive type of each pixel and labeling each pixel accordingly. 7. The method of claim 4 , wherein the determining whether each pixel is a perceptually significant pixel or a perceptually insignificant pixel comprises deeming the each pixel to be perceptually insignificant if the each pixel is at least one of: noise, contour, region boundary, texture boundary, and transition region.