| 摘要 |
A representative marker sensing section senses one representative marker from a frame shot by an image input section. A pattern dot sensing section senses pattern dots on the basis of the representative marker. A data dot reading point determining section determines reading points. With this configuration, once one representative marker has been sensed from the imaging frame, pattern dots are sensed on the basis of the representative marker and data reading points are calculated. This not only avoids an adverse effect of the disappearance of markers or the occurrence of erroneous markers and prevents the block data from being partially lost but also reduces the marker sensing process, avoids code reproduction failure, and speeds up the processing.
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