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:
Jul. 20, 1999
Filed:
Apr. 21, 1997
Kenichi Ohta, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A select-signal generator generates a select signal according to a magnitude comparison between the low-order bit data R.sub.l, G.sub.l, and B.sub.l of input R, G, and B color signals. A table memory generates three addresses with the use of the high-order bit data R.sub.u, G.sub.u, and B.sub.u according to the select signal and outputs lattice point data C11, C12, and C13 corresponding to the three addresses. Another table memory outputs one lattice data C2 for a lattice point which is offset from lattice points in the above-described table memory by addressing with the use of the high-order bit data. Then, an interpolation circuit executes interpolation according to the data C11, C12, C13, and C2 at four lattice points which form a triangular pyramid as a minimum interpolation space.