Adjusting contrast in anti-aliasing

Details Adjusting contrast in anti-aliasing Adjusting contrast in anti-aliasing

1996-01-25

1999-07-27

Fetting, Anton

Computer graphics processing and selective visual display system

Computer graphics processing

Character generating

G06T 1140

Patent

active

059298669

ABSTRACT:
A method and apparatus for processing a character for anti-aliased display on a raster output device. A set of density values is computed for a set of raster positions to represent the character and the density values of the set are scaled to extend their range upward toward a maximum density value, whereby generally at least one of the density values of the set becomes the maximum density value. In one embodiment, the set of density values is computed from a rendering of the character at resolution higher than the resolution of the output device. In another embodiment, the character is created by a font having font metrics including a reference dimension, and the density values are scaled by computing adjusted values as a non-decreasing function of the original values, the function being defined to compute a maximum adjusted density value for at least one non-maximum density value.

REFERENCES:
patent: 4331955 (1982-05-01), Hansen
patent: 4486785 (1984-12-01), Lasher et al.
patent: 4580231 (1986-04-01), Tidd et al.
patent: 4591844 (1986-05-01), Hickin et al.
patent: 4667247 (1987-05-01), Karow
patent: 4672369 (1987-06-01), Preiss et al.
patent: 4675830 (1987-06-01), Hawkins
patent: 4720705 (1988-01-01), Gupta et al.
patent: 4783652 (1988-11-01), Lumelsky
patent: 4827255 (1989-05-01), Ishii
patent: 4851825 (1989-07-01), Naiman
patent: 4907282 (1990-03-01), Daly et al.
patent: 4908780 (1990-03-01), Priem et al.
patent: 4945351 (1990-07-01), Naiman
patent: 5099435 (1992-03-01), Collins et al.
patent: 5241653 (1993-08-01), Collins et al.
patent: 5278678 (1994-01-01), Harrington
patent: 5301267 (1994-04-01), Hassett et al.
patent: 5386509 (1995-01-01), Suzuki et al.
patent: 5398306 (1995-03-01), Karow
patent: 5459828 (1995-10-01), Zack et al.
patent: 5568697 (1996-10-01), Nakayama et al.
patent: 5771048 (1998-06-01), Nankou et al.
Foley et al.; "Computer Graphics Principles and Practice--Second Edition"; Addison-Wesley Publishing Company; 1990; pp. 132-140, pp. 617-646, and pp. 965-979.

Affiliated with

Also associated with

Rating

Adjusting contrast in anti-aliasing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adjusting contrast in anti-aliasing, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjusting contrast in anti-aliasing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-884439