首页>
外国专利>
Arrangement for, and method of, determining a target distance and adjusting reading parametres of an imaging reader based on target distance
Arrangement for, and method of, determining a target distance and adjusting reading parametres of an imaging reader based on target distance
展开▼
机译:确定目标距离并基于目标距离调整成像读取器的读取参数的装置和方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
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 along an aiming axis to the target, and by 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 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.
展开▼