| 摘要 |
Virtual straight lines are parallelly shifted at regular intervals from starting points, which are four vertexes of a rectangular-shaped captured image, toward the center of the captured image, the virtual straight lines being tilted at an angle of a predetermined degree with respect to coordinate axes extending along two mutually orthogonally intersecting edges of the captured image. While doing so, intersection points between the virtual straight lines and outline elements are obtained. Based on the intersection points, angular points of a contour of a document is obtained. Based on the angular points, a mesh model is generated.
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