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. 24, 2001
Filed:
Nov. 03, 1998
Applicant:
Inventor:
Shogo Oneda, Chiba, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/36 ;
U.S. Cl.
CPC ...
G06K 9/36 ;
Abstract
A color image data compressing apparatus comprising a color space converting section for receiving RGB data and outputting data for lightness and chromaticity, a plurality of space converting sections each for converting the data from actual space to a coefficient in each specified transform space, a plurality of quantizing sections each for quantizing the coefficient, and a coding section for coding the quantized data, in which the degree of quantization of the coefficient data is changed according to data for lightness.