| 摘要 |
A device includes: a motion vector decoder that decodes the encoded motion vector information; a motion vector classification unit that classifies a moving direction of the motion vector into one of a plurality of directional ranges that are preliminarily defined; a different direction image block extractor that extracts the image block having the classified directional range different from the peripheral image blocks; an image block connector that connects consecutive image blocks, when any image blocks in the same directional range exist consecutively in the extracted image block; and a contour extractor that extracts the line spanning the outermost periphery of the connected image blocks as the contour data.
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