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:
Dec. 16, 1997
Filed:
Apr. 10, 1995
Kenji Kawahara, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
The present invention provides an image compression device for performing an image compression process for each one of a plurality of blocks into which an original image picture is divided, the device including image correction section for generating a corrected image picture for reducing a block distortion occurring at a block boundary in a restored image picture generated by decompressing a compressed image picture. The image correction section performs a process for reducing a block distortion occurring at a block boundary between a target block to be compressed and a processed block already compressed and adjoining the target block by: referring to a restored pixel value of a restored image obtained by decompressing a compressed image of the processed block, and at least one of an original pixel value of an original image of the processed block and a corrected pixel value of a corrected image of the processed block; and performing an operation for the restored pixel value and at least one of the original pixel value and the corrected pixel value so as to generate a corrected pixel value of the target block and output a corrected image for the target block.