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. 30, 1996
Filed:
Oct. 27, 1993
International Business Machines Corporation, Armonk, NY (US);
Abstract
An improved method is disclosed of compressing, for storage or transmission, the information contained in a bi-level digitized input image by separate handling of a corresponding template image and a compressed image, which method is capable of handling 'white-out' areas of the image. In accordance with the method, the template image is subtracted from the input image to generate the compressed image, the subtraction is characterized in that the subtraction step determines, for each pixel, whether the pixel is a 'removed pixel' and, if so, the pixel is assigned to be black in the compressed image. A pixel is a 'removed pixel' if the corresponding pixel in the template image is black, and the corresponding pixel in the input image is white.