将图像映射到极坐标，此程序可以用来模拟人来的中央视觉，并可以用于物体跟踪方面的尺度及选旋转不变的模板的快速匹配-The image is mapped to polar coordinates, this procedure can be used to simulate people to the central vision, and can be used for object tracking in scale and rotation invariant template of the