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:
Apr. 02, 2013
Filed:
Sep. 21, 2010
Junichi Odagiri, Kawasaki, JP;
Junichi Odagiri, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An image compression apparatus includes: a line memory unit for holding pixel values for at least one immediately previous line in the lines to be processed of an image to be compressed; a division unit for dividing pixels of the line to be processed into 2-pixel blocks; a first estimation value calculation unit for extrapolation-estimating the 2-th pixel and the 2-th pixel in the blocks divided, and obtaining an estimated value in processing for the first hierarchical level; a second estimation value calculation unit for interpolation-estimating certain pixels and obtaining an estimated value in the processing for the second hierarchical level through the processing for the n-th hierarchical level; and an estimation coding unit for obtaining an estimation error from the estimated value, converting the estimation error into a quantization number, converting the quantization number into a variable length code, and obtaining a compression code.