Patent ID: 7428079
Filing Date: 2008-09-23
Classification: G06K,H04N

Abstract:
1. A bar code reading device for reading a bar code symbol disposed within an area, said bar code reading device comprising: (a) an imaging assembly comprising a two dimensional image sensor having a plurality of pixels, said plurality of pixels formed in a plurality of rows of pixels, said image sensor having a set of pixels that generate electrical signals representing light incident on said image sensor when said bar code reading device operates in a full frame image capture mode, said imaging assembly having optics focusing an image onto said image sensor; and (b) a control circuit coupled to said imaging assembly wherein said control circuit is configured to operate according to a first image capture operating mode and a second image capture operating mode; (c) wherein said control circuit when operating according to said first image capture operating mode captures a partial frame of image data, said partial frame of image data captured by said control circuit when said control circuit operates according to said first image capture operating mode having image data corresponding to light incident at less than all pixels of said set of pixels of said image sensor, wherein said control circuit further captures at least one parameter determination frame of image data for processing to establish at least one operating parameter of said bar code reading device, said at least one parameter determination frame of image data also having image data corresponding to light incident at less than all pixels of said set of pixels of said image sensor; (d) wherein said control circuit when operating according to said second image capture operating mode captures a frame of image data having image data representing a larger portion of said area than said partial frame of image data captured by said control circuit when operating according to said first image capture operating mode; (e) wherein a frame rate of said bar code reading device when executing said first image capture operating mode is faster than a frame rate of said bar code reading device when executing said second image capture operating mode; and (f) wherein said control circuit is configured to attempt to decode said bar code symbol utilizing both image data captured by said control circuit in said first image capture operating mode and image data captured by said control circuit in said second image capture operating mode.