This can be a tedious process because the first time you create the plane, you have to rotate the camera and change the focal length at the same time to get a good match.
这个过程可能很乏味，因为你要先建立平面，还不得不去旋转摄像机，并调节焦距以得到好的匹配效果。
By rotating the camera slowly try to match our 3d plane with the one in the reference. Also scale the plane and make it longer.
我们得慢慢旋转摄像机以将我们的3d平面匹配到参考图中，另外还要将它拉长些。
The image motion is obtained by the gray project and then the motion data is accurately detected by the grid detection and bit plane match method.
算法采用灰度投影获取全局运动，用网格检测和灰度切分图精确匹配的方法获取更准确的运动数据。
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