US 6,983,083 B2
Image specific perceived overall contrast prediction
Elena A. Fedorovskaya, Pittsford, N.Y. (US); Michael E. Miller, Rochester, N.Y. (US); and Patricia D. Snyder, Rochester, N.Y. (US)
Assigned to Eastman Kodak Company, Rochester, N.Y. (US)
Filed on Feb. 13, 2001, as Appl. No. 9/782,240.
Prior Publication US 2002/0145757 A1, Oct. 10, 2002
Int. Cl. G06K 9/36 (2006.01)
U.S. Cl. 382—286 34 Claims
OG exemplary drawing
 
1. A method of determining overall lightness contrast of an image comprising:
extracting pixel values of lightness from said image;
calculating an image edge contrast based on said pixel values;
calculating area contrast based on said pixel values;
calculating image range based on said pixel values;
calculating relative average lightness based on said pixel values, and
calculating said overall lightness contrast of said image by combining said edge contrast, said image range, said area contrast and said relative average lightness.