Shape discrimination device, shape discrimination method and shape discrimination program

A shape discrimination device comprising:

• at least one memory configured to store computer program code;
• and
• at least one processor configured to access said at least one memory, read said computer program code and operate as instructed by said computer program code, said computer program code comprising:
• approximate curve calculation code configured to cause at least one of said at least one processor to calculate an approximate curve of a contour, the contour being a line having a finite length representing a part of an outline of an object shown in an image and the contour being defined between a first end and a second end, the approximate curve being a line approximating to the contour and calculated based on coordinates forming the contour, the approximate curve being defined between a first end, corresponding to the first end of the contour, and a second end, corresponding to the second end of the contour;
• distance calculation code configured to cause at least one of said at least one processor to calculate a first distance from the first end of the contour to the corresponding first end of the approximate curve, and calculate a second distance from the second end of the contour to the corresponding second end of the approximate curve;
• coincidence calculation code configured to cause at least one of said at least one processor to calculate a center coincidence, indicating an extent of coincidence between a center of the contour and a center of the approximate curve;
• specifying code configured to cause at least one of said at least one processor to specify a shape of the object or a part of the object based on the first distance, the second distance, and the center coincidence;
• and
• output code configured to cause at least one of said at least one processor to output information regarding the shape of the object or the part of the object specified.