然后根据定位杆的基准坐标，得到该层的射影变换算子T；
Then, according to the base coordinate of locating rod, gain the coefficients of projective transformation.
这个系统既不需要相干光输入图像，也不需要基准图像的付氏变换金息图。
Neither the coherent optical input image nor the Fourier transform hologram of the reference image is required by this system.
通过基准及坐标的变换，最终得到目标物体的绝对坐标。
Through the transformations of criterion coordinate, the absolute coordinates of the object can be gotten finally.
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