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:
Jun. 16, 2009
Filed:
Apr. 17, 2007
Kathrin Berkner, Menlo Park, CA (US);
Ramesh Neelamani, Houston, TX (US);
Edward L. Schwartz, Sunnyvale, CA (US);
Martin Boliek, San Francisco, CA (US);
Kathrin Berkner, Menlo Park, CA (US);
Ramesh Neelamani, Houston, TX (US);
Edward L. Schwartz, Sunnyvale, CA (US);
Martin Boliek, San Francisco, CA (US);
Ricoh Co., Ltd., Tokyo, JP;
Abstract
A method and apparatus are described for performing header-based scaling and cropping of images compressed using multi-scale transforms. In one embodiment, the method for adaptively scaling an image comprises receiving a file containing a header that contains multi-scale entropy distribution information on blocks of an image; for each block, determining that the block retains significance at a scale upon determining that an entropy of a multi-scale coefficient of a block at the scale is greater than a mean entropy of multi-scale coefficients of blocks in at least one coarser scale; and scaling the image to a coarsest scale at which a threshold percentage of the blocks retain significance at the scale.