The technique used to improve the tonal qualities of an image taken with a digital camera have been described. The technique first identifies the visually important regions of an image. Enhancement is then achieved through exposure correction based on an exponential exposure-pixel intensity curve, obtained by fitting the linear curve that the digital camera gave. This technique ensures that the output images have
i) pleasing mid-tones and suppressed extremes
ii) good detail in visually important areas rather than good overall balance at the cost of the subject quality.
Other possible ideas include having multiple-passes of image enhancement to further improve the image and obtaining a better curve for the digital camera.