Patent ID: 8950676
Filing Date: 2015-02-10
Classification: G06K

Abstract:
1. An arrangement for electro-optically reading a target by image capture, comprising: a housing; an aiming assembly for projecting an aiming light pattern on the target that is located within a range of working distances relative to the housing; an imaging assembly for capturing an image of the target and of the aiming light pattern over a field of view, and for generating an electrical signal indicative of the captured image; a controller for determining a distance of the target relative to the housing based on a position of the aiming light pattern in the captured image, and for processing the electrical signal to decode captured image of the target when the target lies in a restricted zone within the range of working distances and rejecting any decoding of the captured image of the target when the target lies outside the restricted zone; and wherein the controller is operative for determining the target distance based on a position of the aiming light pattern in an image captured during a ranging frame, for processing the electrical signal to decode captured image of the target during a decode frame, and for generating a timing sequence of one or more decode frames for capturing images alternating with at least one ranging frame for capturing the image with the aiming light pattern to determine the target distance, the timing sequence including at least one decode frame that occurs prior to the at least one ranging frame for capturing the image with the aiming light pattern to determine the target distance and at least one decode frame that occurs subsequently to the at least one ranging frame for capturing the image with the aiming light pattern to determine the target distance.