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:
Jul. 05, 1983
Filed:
Oct. 31, 1980
Enrique Garcia, Sandy Hook, CT (US);
Peter L Dillon, Pittsford, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
Pattern noise in the output signal produced by an array of solid state light responsive elements is reduced by adjusting the responses of a subset of elements towards an average element response, thereby reducing the standard deviation of the element response distribution. The elements receiving response adjustments have responses in the upper and lower extremes of the element response distribution as determined by measuring the output of the sensor under controlled illumination conditions. A pattern noise reducing circuit includes: (1) means for deriving a set of response adjustment signals representing (a) the locations in the array of a subset of elements having responses in the upper and lower extremes of the element response distribution and (b) amounts of adjustment to the responses of said subset of elements to move said element responses toward an average response, and (2) means for applying to the signals representing the imagewise responses of said subset of elements, adjustments corresponding to said response adjustment signals, to produce imagewise output signals having reduced pattern noise. According to a further feature of the invention, redundancy reducing coding (e.g. run length coding) is employed to code the locations of the adjusted elements in the memory, thereby reducing the required size of the memory.