对最大类间方差法的改进主要表现在两个方面：建立阈值的评价准则和提高算法的运行速度。

The improvement in Ostu algorithm is represented in two aspects: establishing evaluation rules of segmentation threshold and accelerating the algorithm's operation.

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二是在端点检测上进行了算法改进，分别采用了动态窗长及零能积差的阈值判决法。

Second, the end of the algorithm to improve the detection, long and dynamic Windows were used to zero threshold from poor judgment algorithms.

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采用改进的双阈值法和基于模型的方法进行渐变镜头的检测，根据运动向量的变化检测摄像机的运动状态。

Dual threshold and Basing on model are used to detect gradual changes, and the change of motorial vectors is used to detect the motion of the camera.

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