Color image enhancement

摘要

A color image is enhanced in the following fashion. A saturation detector (SDT) detects a degree of color saturation (LC, CC) that occurs in an image area (SP). A filter arrangement (DE1, DE2, DE3) filters at least one spatial detail in the image area to a degree that depends on the degree of color saturation. This allows an improvement of perceptual quality of color images.

主权项

1. A method of image enhancement, comprising:
detecting a degree of color saturation in an image area; and filtering at least one spatial detail in the image area by:
determining a first luminance value corresponding to a pixel of interest in the image area;determining a second luminance value corresponding to one or more neighboring pixels neighboring the pixel of interest;obtaining a difference in luminance value between the first luminance value and the second luminance value; andamplifying the difference in luminance value by a factor that increases as the degree of color saturation increases.