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. 29, 2004
Filed:
Mar. 13, 2000
Li-ming Chen, Keelung, TW;
Sunplus Technology Co., Ltd., , TW;
Abstract
A method and apparatus for forming multi-level dither images from an input digital image are disclosed. The difference between a pixel value of the input digital image and a pixel value of a dither image corresponding to the input digital image is first determined. Next, the difference is processed by an error filter to correct the pixel value of the input digital image to generate a corrected image pixel value. The corrected image pixel value is then compared to at least two threshold values, each corresponding to a pixel value of the dither image, to determine a threshold value that is nearest to the corrected image pixel value, thereby obtaining a pixel value of the dither image corresponding to said threshold value.