1. A method of image-dependent color saturation correction in natural scene images in electronic documents including the steps of: converting an original image from its original color space definition to a second color space definition having a saturation component with a strong correlation to perceived saturation; determining average saturation for at least a portion of the value range of the original image data as a function of the saturation component in the second color space definition thereof; comparing determined average saturation to a target saturation selected to represent a desirable saturation, and generating a comparison signal indicating whether determined average saturation is less than target saturation; if the comparison signal indicates average saturation is less than target saturation, generating filter coefficients as a function of average saturation and desired saturation; directing the original image defined in terms of the second color space to a programmable filter operating on the saturation component thereof with the generated filter coefficients, to produce a saturation-modified image; directing the saturation-modified image to an output device; if the comparison signal indicates average saturation is greater than target saturation, directing the image to an output device without modification to the saturation component.