The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2001
Filed:
Mar. 28, 2000
Ichiro Iimura, Hitachi, JP;
Yasuhiro Nakatsuka, Koganei, JP;
Jun Satoh, Musashino, JP;
Takashi Sone, San Jose, CA (US);
Hitachi, Ltd., Tokyo, JP;
Abstract
An image processing system for perspectively projecting a triangle defined in a three-dimensional space onto a two-dimensional space and shading the triangle in the two-dimensional space, includes a memory which stores at least inverses of depth coordinates; a CPU which calculates a plane slope element coefficient which implies a plane slope element of the triangle defined in the three-dimensional space, and calculates an interpolation coefficient from the plane slope element coefficient; and a graphics processor which makes a perspective correction using the interpolation coefficient and inverses of depth coordinates stored in the memory. The graphics processor may output inverses of depth coordinates for storage in the memory in advance, and may output a result of the perspective correction for storage in the memory. The image processing system may also include a display for displaying a result of the perspective correction.