Graphics system for displaying images in gray-scale

Details Graphics system for displaying images in gray-scale Graphics system for displaying images in gray-scale

1995-06-07

1997-09-23

Hjerpe, Richard

Computer graphics processing and selective visual display system

Display peripheral interface input device

345199, G09G 504

Patent

active

056709862

ABSTRACT:
A graphics system for use with a computer in a gray-scale mode. The graphics system utilizes a lookup table having index values to be stored in a frame buffer. The lookup table is addressed by convening color information, such as RGB color information, to a luminance value, which is then used to access the table. The index values may be used to index a second lookup table for providing luminance information. The present invention further discloses methods of insuring index values provided by the lookup table closely approximate the desired luminance value within the available gray-scale space. Further, the present invention provides methods for performing arithmetic transfer operations on gray-scales represented by indices in the frame buffer.

REFERENCES:
patent: 4368463 (1983-01-01), Quilliam
patent: 4475104 (1984-10-01), Shen
patent: 4598282 (1986-07-01), Pugsley
patent: 4641282 (1987-02-01), Ounuma
patent: 4654720 (1987-03-01), Tozawa
patent: 4779083 (1988-10-01), Ishii et al.
patent: 4799053 (1989-01-01), Van Aken et al.
patent: 4835599 (1989-05-01), Sigel
patent: 4847604 (1989-07-01), Doyle
patent: 4991122 (1991-02-01), Sanders
patent: 5018085 (1991-05-01), Smith, Jr.
patent: 5068644 (1991-11-01), Batson et al.
patent: 5091720 (1992-02-01), Wood
patent: 5204665 (1993-04-01), Bollman et al.
patent: 5222206 (1993-06-01), Liao
patent: 5278678 (1994-01-01), Harrington
patent: 5299291 (1994-03-01), Ruetz
patent: 5384902 (1995-01-01), Carlsen
patent: 5479189 (1995-12-01), Chesavage et al.

Affiliated with

Also associated with

Rating

Graphics system for displaying images in gray-scale does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Graphics system for displaying images in gray-scale, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Graphics system for displaying images in gray-scale will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1940096