The time performance of region labeling algorithm is important for image process. However, common region
labeling algorithms cannot meet the requirements of real-time image processing. In this paper, a technique using block to
record the connective area is proposed. By this technique, connective closure and information related to the target can be
computed during a one-time image scan. It records the edge pixel's coordinate, including outer side edges and inner side
edges, as well as the label, and then it can calculate connecting area's shape center, area and gray. Compared to others,
this block based region labeling algorithm is more efficient. It can well meet the time requirements of real-time
processing. Experiment results also validate the correctness and efficiency of the algorithm. Experiment results show that
it can detect any connecting areas in binary images, which contains various complex and quaint patterns. The block
labeling algorithm is used in a real-time image processing program now.
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