Color enhancement technique using skin color detection

摘要

A method for enhancing the color of an image to be displayed includes receiving an input image having a plurality of pixels where each of the pixels has a plurality of color components. The input image is filtered using a spatial filter in such a manner that the lower frequency content of the input image is enhanced in such a manner that the dynamic range of the lower frequency content is increased. The filtered image is modified such that the higher frequency content of the input image is used to modify the filtered image.

主权项

1. A method for enhancing the color of an image displayed on a display, said method comprising:
(a) receiving an image having a plurality of pixels where each of said pixels has a plurality of color components; (b) filtering said image with a sigma filter to obtain a base image wherein said base image is characterized by having primarily low frequency components of said image; (c) modifying said input image to obtain a residual image by subtracting said base image from said image, wherein said residual image is characterized by having primarily high frequency components of said image; (d) filtering said base image with a spatial filter to determine potential skin tone regions and subsequently use a color dynamic range enhancement technique that modifies the differences in similar colors to obtain an enhanced base image such that the modification of said differences is larger in said skin-tone regions than in non-skin-tone regions of said base image; (e) creating a resulting image based upon said residual image and said enhanced image.