The relationships in various directions between the function, the sum of absolute value of gray difference of image, and the motion blur direction are studied for the first time in this paper.

本文首次研究了在不同方向的图像灰度差的绝对值之和与图像运动模糊方向的关系。在此基础上，提出了几种运动模糊图像清晰度评价函数，并研究了它们的优缺点和适用范围。

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