Appeal No. 1998-0292 Application No. 08/209,633 investigation; conducting a framing mask operation on each of said source gray scale values for producing modified gray scale values from each of said source gray scale values as a function of a preassigned brightness value and a contrast value; 3Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 NextLast modified: November 3, 2007