Patent ID: 9367722
Filing Date: 2016-06-14
CPC Classification: G06K

Claim Text:
1. An indicia reading system, comprising: a scanning module for scanning a beam across a scanning field in a scanning cycle; a scan line detector for detecting a start of each scanning cycle performed by the scanning module and generating a start of scan (SOS) signal in response to the detection of the start of each scanning cycle; a photo-detector for detecting the intensity of light reflected from the scanning field and generating a first signal corresponding to the detected light intensity; a signal processor having a processing stage for processing the first signal and converting the processed first signal into a second signal comprising at least one of the first signal's raw intensity data, first derivative data, and the absolute value of the first derivative data; a gain control module for, during each scanning cycle, controlling the gain of the processing stage within the signal processor using the SOS signal generated by the scan line detector and the second signal generated by the signal processor; and a decode processor for processing the second signal and generating data representative of indicia in the scanning field.