In this paper a new high accuracy image measurement and registration system design is proposed, in which edges of image in pixel are detected by improved Canny operator, edge points are recorded by an auto-tracing algorithm, edges in sub-pixel are located by spatial moment-based operator. The object parameters are calculated by means of Least Squares and the accuracy is improved by a proposed algorithm. Finally an automatic detection,recognition and measurement algorithm is proposed. The simulation experiment on a standard circle shows the properties of validity, feasibility about the design and algorithm proposed.
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