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. 26, 1994
Filed:
Aug. 31, 1992
Yoshimichi Kanda, Kawasaki, JP;
Hajime Ichimura, Ichikawa, JP;
Shinji Yamakawa, Kawasaki, JP;
Midori Aida, Yokohama, JP;
Ouji Maruyama, Tokyo, JP;
Tomio Sasaki, Tokyo, JP;
Makoto Hidaka, Yokohama, JP;
Kouichi Noguchi, Machida, JP;
Toshihiko Kuroi, Tokyo, JP;
Yasuyuki Nomizu, Ebina, JP;
Keiichi Nomura, Kawasaki, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image processing apparatus for image compression and decompression includes a smoothing part for smoothing image data of a reconstructed image by using a smoothing filter selected from among a plurality of smoothing filters having different smoothing effects, an averaging part for producing a set of values of averages of coefficients produced through discrete cosine transformation with respect to a plurality of blocks in the reconstructed image so that a distribution of the averages of the coefficients for a target block is generated, and a selection part for generating a signal to enable the smoothing part to select the smoothing filter by detecting whether or not peak values in the distribution of the averages of the coefficients, generated by the averaging part, appear substantially on a diagonal line of the target block passing a lowest-order position through a highest-order position of the target block.