Patent ID: 7545949
Filing Date: 2009-06-09
Classification: G03B,H04N

Abstract:
1. A method for setting a shutter time parameter and a gain parameter of an imager, the gain parameter having a minimum allowable gain value and a maximum allowable gain value, comprising: configuring the imager to capture images of a field of view of a production line in relative motion with respect to the field of view in a direction and at a nominal line speed, the field of view having a size in the direction of motion of the production line; choosing a motion parameter that specifies a desired relative motion of the production line, in units related to pixels, during an interval specified by the shutter time parameter; estimating, responsive to the nominal line speed, an apparent line speed in units related to pixels per unit of time; computing, responsive to the apparent line speed and the motion parameter, a motion shutter time; inputting a desired image brightness parameter; computing, responsive to the desired image brightness parameter, a brightness shutter time; computing a desired shutter time and a desired gain, such that setting the shutter time parameter of the imager to the desired shutter time, and the gain parameter of the imager to the desired gain.