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. 02, 2000
Filed:
Nov. 06, 1997
Priyadarshan Kolte, Austin, TX (US);
Roger Smith, Austin, TX (US);
Motorola Inc., Austin, TX (US);
Abstract
One way of filtering graphics images to remove pixel dropout and shot noise while preserving overall image quality is to use non-linear filters based on rank order of an M.times.N grid of pixel values surrounding a pixel to be filtered. This rank order filter method for M.times.N grids first sorts columns, then sorts rows, and finally sorts diagonals to obtain either just a median filter value, a rank-based filter value, or a complete sorted order of the M.times.N grid. All of the sort operations are control-flow-free allowing implementation on SIMD processors processing multiple overlapping M.times.N grids in parallel. Advantage is taken of columns and rows that are shared among the horizontally and vertically overlapping M.times.N grids in the digital image to reduce the total number of sort operations for the image.