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:
Aug. 17, 1993
Filed:
Jul. 30, 1991
Mary Deshon, Winthrop, MA (US);
Allan Green, Framingham, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
Improved digital image processing circuitry for sharpening edges and details of a recorded image digitally while minimizing the amplification of noise in the input recorded image provides an output recorded image which is the sum of chrominance signals processed by color processing circuitry and luminance signals processed by color processing circuitry and sharpness circuitry. Input recorded images are provided for concurrent parallel processing by both the color processing circuitry and the sharpening circuitry in a manner whereby the color processing circuitry generates low spatial frequency luminance signals and the sharpness circuitry generates high spatial frequency luminance signals both of which are subsequently combined to provide an output signal in which the amplitude of the high spatial frequency noise component associated therewith is minimized.