×

Color enhancement technique using skin color detection

  • US 9,143,657 B2
  • Filed: 03/30/2006
  • Issued: 09/22/2015
  • Est. Priority Date: 01/24/2006
  • Status: Active Grant
First Claim
Patent Images

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.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×