Outline definition apparatus and outline definition method, and image processing apparatus

摘要

An outline definition apparatus includes an edge detection unit detecting pixels at edge positions, each of the pixels at the edge positions having a data value between a value representing a first level and a value representing a second level, a pixel extraction unit extracting the pixels at the edge positions and extracting pixels in the vicinity thereof, a boundary-line generation unit generating a boundary line indicating a boundary between a region of the first level and a region of the second level in each of the pixels at the edge positions, and a link-processing unit obtaining an outline indicating a boundary between a region of the first level and a region of the second level in the still image by linking the boundary lines which are generated in the boundary-line generation unit and which are generated for the pixels which are located at the edge positions.