把鱼眼图象变换成透视投影图象，球面投影是一种简单有效的方法。
Spherical projection is a simple and effective method to transform a fisheye image to a perspective projection image.
球面曲面到平面上的透视投影。
PERSPECTIVE PROJECTION of the surface of a sphere onto a plane.
球面曲面到平面上的透视投影。
PERSPECTIVE PROJECTION of the surface of a sphere onto a plane.
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