Patent ID: 7256833
Filing Date: 2007-08-14
Classification: H04N

Abstract:
1. An electronic vision system, comprising: an illumination light generator capable of generating illumination light of a plurality of different illumination light colors and/or intensities and which illuminates a part feature against a part feature background; a camera which images the part feature against the part feature background; a contrast tester which measures a contrast level between said part feature and said part feature background; and an illumination system controller which is responsive to the contrast level and to acceptable contrast criteria to adjust the illumination light generator to illuminate the part feature against the part feature background to one of the plurality of different illumination light colors and/or intensities such that the contrast level meets the acceptable contrast criteria, wherein the illumination system controller steps through a set of available coarse illumination colors and then steps through a set of available fine illumination colors within a predetermined range of the coarse illumination colors resulting in a highest contrast level.