据此，可以由正多边形物体的正投影像提取原像的尺寸，实现物像关系的标定。
Therefore, the size of the equilateral polygon can be uniquely extracted by its front-projection image and the photogrammetric calibration can be done accordingly.
据此，可以由正多边形物体的正投影像提取原像的尺寸，实现物像关系的标定。
Therefore, the size of the equilateral polygon can be uniquely extracted by its front-projection image and the photogrammetric calibration can be done accordingly.
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