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:
Sep. 30, 1997
Filed:
Jun. 05, 1995
Applicant:
Inventor:
Yoshimichi Kanda, Kawasaki, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06T / ;
U.S. Cl.
CPC ...
382250 ; 382264 ; 382275 ; 358454 ; 358433 ;
Abstract
An image processing apparatus for image compression and decompression in which occurrence of moire in a reconstructed image is eliminated. The apparatus includes an encoder part for encoding an image into a compressed image, and a decoder part for decoding the compressed image into a reconstructed image. The encoder part includes an input part, a predictive coder, a subtracter, an ADCT encoder and a code memory. The predictive coder and subtracter act to remove high-frequency components prior to the calculation of the DCT coefficients by the ADCT encoder, thereby preventing moire in the reconstructed image.