APPARATUS AND METHOD FOR FINDING TARGET DISTANCE FROM BARODE IMAGING SCANNER

摘要

An apparatus includes an imaging sensor having photosensitive elements for detecting light from the target object through an imaging lens arrangement to create first pixel data during a first time period when the extended aiming pattern is projected on the target object. The apparatus also includes a controller for processing the first pixel data to estimate a feature-size of the extended aiming pattern in an image of the target object when the imaging lens arrangement is at a predetermined focus length, and further processing the feature-size along with the predetermined focus length to determine a distance characterizing the separation between the target object and the imaging lens arrangement.