3. The apparatus of claim 2 , wherein the processing device is further configured to: apply a chromatic transformation to accommodate for a particular illumination condition of the scene; label each pixel in the image with a label of a descriptive type to correspond with the descriptive type of an element of the scene to which each pixel belongs; perform adaptive smoothing of the image with an amount of smoothing around each pixel in correspondence with the descriptive type of each pixel; for each pixel, determine whether each pixel is a perceptually significant pixel or a perceptually insignificant pixel; and reapply chromatic transformation to preserve a color appearance as perceived in the human observation.
3. The apparatus of claim 2 , wherein the processing device is further configured to: apply a chromatic transformation to accommodate for a particular illumination condition of the scene; label each pixel in the image with a label of a descriptive type to correspond with the descriptive type of an element of the scene to which each pixel belongs; perform adaptive smoothing of the image with an amount of smoothing around each pixel in correspondence with the descriptive type of each pixel; for each pixel, determine whether each pixel is a perceptually significant pixel or a perceptually insignificant pixel; and reapply chromatic transformation to preserve a color appearance as perceived in the human observation. 4. The apparatus of claim 3 , wherein the labeling each pixel further comprises the processor configured to: determine if each pixel in the image represents an edge; estimate distribution of edge density in a neighborhood of the each pixel in the image; and use the distribution to determine a descriptive type of each pixel and labeling each pixel accordingly.