| 摘要 |
[Problem] To accurately identify hollow structures contained in an image. [Solution] A filtering unit (32) calculates an evaluation matrix on which filtering has been performed using a two-layer partial differentiation matrix of a function that represents hollow spheres, at each pixel position in an image that represents a hollow structure. An evaluation unit (34) calculates at least one evaluation value selected from point structure likeness, linear structure likeness and planar structure likeness on the basis of the evaluation matrix. |
