This step is linked with the final render step, so we will simply create a background image one at a time with specified parameters, then automate this generation process frame by frame.
此步骤与最终渲染步骤关联，因此我们将使用指定参数一次仅创建一个背景图像，然后逐帧自动进行此生成过程。
Perhaps the most common and easiest way to do this is to use a 'triangle' shape between objects in an image with three objects in a frame positioned with one to each side and one more central.
或许最常规、最简便的做法就是在图像物体间使用“三角”造型：3个物体，一边一个，另外一个置于中心。
Cancelling frame redundant through motion estimation and compensation is one of the key technique of the video image compression code.
通过运动估计与补偿技术去除帧间冗余是实现视频图像压缩的关键技术之一。
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