Arrangement for, and method of, determining a target distance and adjusting reading parameters of an imaging reader based on target distance

A distance to a target to be read by image capture over a range of working distances is determined by directing an aiming light spot (102, fig 5) along an aiming axis (48, fig 2) to the target and capturing a first image of the target containing the aiming light spot, and by capturing a second image...

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Bibliographic Details
Main Authors Chinh Tan, Carl D Wittenberg, Harry E Kuchenbrod, David P. Goren
Format Patent
LanguageEnglish
Published 16.03.2022
Subjects
CALCULATING
COMPUTING
COUNTING
HANDLING RECORD CARRIERS
PHYSICS
PRESENTATION OF DATA
RECOGNITION OF DATA
RECORD CARRIERS
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Summary:A distance to a target to be read by image capture over a range of working distances is determined by directing an aiming light spot (102, fig 5) along an aiming axis (48, fig 2) to the target and capturing a first image of the target containing the aiming light spot, and by capturing a second image of the target without the aiming light spot. Each image is captured in a frame over a field of view having an imaging axis (24, 36, fig 2) offset from the aiming axis. An image pre-processor compares first image data from the first image with second image data from the second image over a common fractional region of both frames to obtain a position of the aiming light spot in the first image, and determines the distance to the target based on the position of the aiming light spot in the first image.
Bibliography:Application Number: GB20210018527