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:
May. 01, 2001
Filed:
Dec. 26, 1997
Carroll Francis Hamill, Boulder, CO (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for scaling a binary image by a non-integer factor with quality enhancement. The method includes the steps of: selecting a pel in an input bitmap which represents the image; selecting a neighborhood centered about the selected pel; comparing the selected neighborhood with a set of preselected image feature patterns representing typical image features; and when the selected neighborhood matches an image feature pattern, writing a block of bits to the output bitmap. The block of bits to be written is obtained by subsampling an image enhancing tile that corresponds to the matched image feature pattern. The size and shape of the block and its destination within the output bitmap are determined by the location of the selected pel within the input bitmap. The process is repeated for each pel within the input bitmap resulting in an output image bitmap which represents a non-integer scaled version of the input bitmap with image quality enhancement. This method is particularly useful for scaling raster font characters from a given input resolution to the resolution required by an output device when the resolution of the output device is a non-integer multiple of the input resolution.