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. 30, 2011
Filed:
Jan. 04, 2002
Ichiro Masaki, Boxborough, MA (US);
Lane Gearle Brooks, Somerville, MA (US);
Vivek A. Sikri, Medford, MA (US);
Keith Glen Fife, Cambridge, MA (US);
Ichiro Masaki, Boxborough, MA (US);
Lane Gearle Brooks, Somerville, MA (US);
Vivek A. Sikri, Medford, MA (US);
Keith Glen Fife, Cambridge, MA (US);
Melexis Tessenderlo NV, Tessenderlo, BE;
Abstract
A system and method adaptively control sensitivity, on a pixel-by-pixel basis, of a digital imager. An illumination intensity level mapping controller determines a number of pixels of image data having illumination intensity levels within a first defined range of illumination intensity levels and determines an illumination intensity level mapping function based upon the determined number of pixels within the first defined range of illumination intensity levels. An exposure controller determines a number of pixels having illumination intensity levels within a second defined range of illumination intensity levels and determines an integration time based upon the determined number of pixels having illumination intensity levels within the second defined range of illumination intensity levels. A transfer control function generation circuit determines a composite transfer control function based on the determined integration time and determined illumination intensity level mapping function; determines each transition point between a plurality of discrete transfer control functions from the determined integration time and the determined illumination intensity level mapping function; and imposes the determined transfer control function upon a pixel of the digital imager.