By extending the calssical fluid mechanism result about the flow field round a pier to two piers , the formula of the deflection degree of flow direcrion is deduced with the assumption that the field around two piers simulates that of one pier 将流体力学中圆柱绕流经典理论的成果推广应用于双圆柱桥墩的情况，假设单桥墩的绕流流场可以按照一定的规律叠加，推导出圆柱形墩斜交桥梁桥下水流流向偏转角度的计算公式。
In this phase to solve the problem that the really face have some inclination and size is not always same , this thesis adjust the stand template thought calculate candidate face areas angle and area size . it can promote the veracity of template matching . at same time it avoid use different size template to try multi - times , the algorithm have higher efficiency 本文使用平均模板匹配方法对候选人脸进行确认,并针对图像中的人脸通常有一定角度旋转和尺寸大小不确定的问题,通过计算候选人脸图像块的偏转角度和面积,并以此调整模板,优化模板配准,提高模板匹配的准确性,同时避免使用多尺度模板进行多次匹配运算,提高算法效率。
