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, 1999
Filed:
Apr. 29, 1997
Atsushi Suganuma, Minamiashigara, JP;
Fuji Photo Film Co., Ltd., Kanagawa-ken, JP;
Abstract
An offset level of a pixel signal outputted from a linear image sensor having a pixel transfer array disposed along a photodetector is corrected by outputting as empty transfer levels signal levels produced from empty pixel transfer array elements when transfer clock pulses are successively applied to the pixel transfer array after one line of pixel signals is transferred from the photodetector through the pixel transfer array. To determine a correcting quantity of a given pixel of a predetermined line, a difference is produced by subtracting an average empty transfer level of a line preceding the predetermined line from an average empty transfer level of the predetermined line. A proportional distribution of the difference from a first pixel to an nth pixel to be corrected with respect all pixels of the predetermined line is determined. The proportional distribution is added to the empty transfer level of the line preceding the predetermined line. Since the average empty transfer levels of the predetermined line and the preceding line are used, the offset level can accurately be corrected.