Patent ID: 7428333

Claim:
A method for enhancing a digital image, comprising: providing a color digital image consisting of a plurality of pixels; converting the color digital image to a luminance image, wherein the color digital image is converted to a luminance image by: calculating the luminace value for each pixel accroding to: I ⁡ ( x , y ) = ( IR ⁡ ( x , y ) · 76.245 + IG ⁡ ( x , y ) · 149.685 + IB ⁡ ( x , y ) · 29.07 ) 255 where I(x, y), represents the overall luminance value, IR(x, y), IG(x, y), and IB(x, y) represent the R, G, B, luminance values repectively, for a pixel with index (x, y); and normalizing the luminance values; enhancing the luminance image by increasing the intensity of at least one darker pixel of the image; and restoring the luminance image to an enhanced color digital image.