Patent ID: 8985456
Filing Date: 2015-03-24
Classification: F21V,F21W,F21Y,G06K,H04N

Abstract:
1. A method of controlling illumination processes within a digital image system having a field of view, comprising: illuminating an object in the field of view at a first energy level; capturing a first digital image of the object illuminated at the first energy level using a predetermined exposure duration; attempting to read a symbol in the first digital image; if a symbol is not read in the first digital image, illuminating the object in the field of view at a second energy level that is different from the first energy level; capturing a second digital image of the object illuminated at the second energy level using the predetermined exposure duration; attempting to read a symbol in the second digital image; if a symbol is not read in the second digital image, analyzing the first digital image and the second digital image to measure whether: determining a modified exposure duration based on the analysis of the first digital image and second digital image; illuminating the object in the field of view at the first energy level; capturing a first subsequent digital image of the object illuminated at the first energy level using the modified exposure duration; attempting to read a symbol in the first subsequent digital image; if a symbol is not read in the first subsequent digital image, illuminating the object in the field of view at the second energy level; capturing a second subsequent digital image of the object illuminated at the second energy level using the modified exposure duration; and attempting to read a symbol in the second subsequent digital image.