该算法是通过计算图像功率谱大小来评价图像的清晰度。清晰的图像功率谱大于模糊图像的功率谱。-The algorithm is derived by calculating the size of the image power spectrum to evaluate the clarity of the image. Clear image power spectrum is greater than the power spectrum of blurred image.

该算法是通过统计图像某一边缘法向方向的灰度变化情况来进行评价。即灰度变化越剧烈， 边缘越清晰， 图像也越清晰。-The algorithm is an edge of the image through the statistical method to change the direction of the gray scale to be evaluated. The more intense the gray change, the more clear the edge of the i

该算法是通过统计图像信息熵大小来评价的图像的清晰度。清晰的图像的熵大于模糊图像的熵。-The algorithm is the image through the statistical entropy to evaluate the size of the image definition. Clear image of the entropy of fuzzy image entropy.

文件中有四种图像评价函数，可以从多帧图像中搜寻最清晰的一帧，代码调试可运行。-There are four file image uation function, can search the clearest multiple frames a frame, debug the code can run.