Fast and high sensitivity focusing evaluation function
一种快速高灵敏度聚焦评价函数*

According to requirements of focusing accuracy and speed,by the analysis and comparison of the common auto-focusing evaluation function,this paper proposed a new evaluation function based on gray scale difference:using product of adjacent pixels difference in the horizontal and vertical direction as core function.The algorithm maintained a good computing performance,and its curve was more steep so that could speed focusing convergence rate and improve focusing accuracy.By using threshold value to filter noi...