Methods and systems for recognizing and reading a coded identification tag from video imagery

Abstract

Methods and systems for quickly and accurately identifying a coded identification tag imaged by conventional CCTV video monitoring equipment are presented herein. In one aspect, a coded identification tag includes a plurality of dark-colored polygons arranged around a light-colored central background area to maximize contrast between the polygons and the central background area. An array of dark-colored dots is arranged over the light-colored central background area. A light-colored border is located around the plurality of dark-colored polygons. A Coded Identification Tag Monitoring (CITM) system estimates the position and orientation of the coded identification tag with respect to the collected image based on the unique orientation of the coded identification tag with respect to an image frame. In some examples, the CITM system decodes the coded identification tag when the tag occupies less than 10% of the area of the image collected by the video imaging system.