| 摘要 |
PROBLEM TO BE SOLVED: To improve precision and efficiency of camera calibration. SOLUTION: A planar board 1, on which a block pattern is printed, is imaged by a camera C1, C2. Feature points are extracted from captured image data A, B (S301). Initial blocks are selected from block patterns photographed in the image data A, B (S302) and the initial blocks are made correspondent to each other (S303). An initial plane transformation matrix is determined from correspondent point coordinates of the initial blocks (S304). A neighboring block of a previous block, in which feature points of the image data B have been made correspondent, is selected (S305) and correspondent positions, on the image data A, of the feature points in the neighboring block are determined from the plane transformation matrix calculated just before (S306). Near the correspondent positions, the feature points of the image data are searched and recorded (S307) and from the search result, the transformation matrix is calculated again (S308). The steps of S305-S309 are iteratively performed upon all the blocks. COPYRIGHT: (C)2009,JPO&INPIT
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