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:
Mar. 20, 2001
Filed:
Sep. 16, 1998
Harry T. Garland, Los Altos Hills, CA (US);
Gerald A. May, Saratoga, CA (US);
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A digital x-ray image (,) is divided (,) into regions (,), (,) according to a selected (,) exposure compensation profile. Each region (,),(,) includes pixel values indicative of gray-scale levels in that region. The pixel values are used to index entries in one of a plurality of spatial LUTs (,) assigned (,) to that region. Entries in the selected spatial LUT (,) contain new pixel values indicative of a transform (,) on the original pixel values used to index the spatial LUT (,). Original pixel values are replaced (,) with corresponding pixel values from the spatial LUT (,). Each region of the x-ray image (,) needing compensation is transformed (,), in turn, until the entire image (,) is processed.