摄影机影像异常侦测方法;Detecting method for abnormal camera images

摘要

一种摄影机影像异常侦测方法，包括：建立一背景模型；取得一待侦测影像；分割符合待侦测影像的尺寸的一监控区域为复数子区域；设定子区域的一第一权重；计算各子区域中，背景模型的一边缘密度及一边缘特征；根据各子区域的边缘密度及边缘特征，分别设定子区域的一第二权重；计算各子区域中，待侦测影像的影像内容及背景模型的一相似度值；及根据第一权重、第二权重及相似度值，决定待侦测影像是否异常。; acquiring an image to be detected; splitting a monitoring area, having the same size as the image, to a plurality of sub-areas; setting a first weight of the sub-areas; computing an edge density and an edge feature of each the sub-areas of the background model; setting a second weight of thesub-areas according to the edge density and the edge feature of each the sub-areas; computing a similarity value of the sub-areasof the background model comparing with that of the image contacts of the image;and detecting whether the image is normal or abnormal according the first weight, the second weight and the similarity value.