定义了用于渐变边界检测的累积帧差,提出了一种基于高斯模型的镜头边界检测新方法,对突变边界和渐变边界分别采用不同参数的高斯模型,实现了阈值的自适应选择,克服了现有的双阈值比较法中下边界阈值难以自适应设定的困难.初步实验结果表明该方法能准确地检测突变和渐变边界.

For the detection of shot boundary in a video sequence,the selection of a proper threshold for computing discontinuity values is an important and difficult problem.A formula for calculating discontinuity values is defined,then a new Gaussian model based technique is proposed,which needs not setting low boundary threshold. It is a kind of improvement of twin-comparison method. Primary experimental results demonstrate that the proposed method enables to locate boundaries of gradual transitions and cuts exactly and quickly.