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. 04, 2003
Filed:
Sep. 01, 1998
Shivaling S. Mahant-Shetti, Garland, TX (US);
David A. Martin, Atlantic Highlands, NJ (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
This invention corrects of white spot noise in an imager. If the brightness value of a pixel is greater than the maximum brightness value of eight surrounding pixels, then the compensated output is this maximum brightness value. If the brightness value of the pixel is less than the maximum brightness value, then no compensation is applied. Alternatively the brightness value of the pixel may be compared with the maximum brightness value plus a threshold value. The invention stores correction values for a few pixels. If a particular pixel has a stored correction value, then this is subtracted from the brightness value of the particular pixel and the maximum brightness correction is applied to this difference. The stored correction value is replaced with the difference between the brightness value of the particular pixel and the maximum brightness value if this difference is greater than the stored correction value.