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引用次数: 3
摘要
基于内容的视频索引和检索可以追溯到基本的视频结构,如目录。因此,随着数字视频技术的不断发展,视频分割算法变得至关重要。这就需要一种工具将视频分解成更小的、可管理的单元,称为镜头。本文提出了一种针对场景突然剪切的镜头边界检测技术。该方法采用绝对差和(sum of absolute difference, SAD)的方法,取R、G、B各平面连续帧之间的块差来计算共发生矩阵。特征向量是从共现矩阵的统计量中提取的,这些统计量在不同的像素位移距离上定义。统计结果被整合到训练集中,并使用无监督分类器K-means来识别投篮帧和非投篮帧。
Shot boundary detection using texture feature based on co-occurrence matrices
Content based video indexing and retrieval traces back to the elementary video structures, such as a table of contents. Thus, algorithms for video partitioning have become crucial with the unremitting growth in the prevalent digital video technology. This demands for a tool which would break down the video into smaller and manageable units called shots. In this paper, a shot boundary detection technique has been proposed for abrupt scene cuts. The method computes cooccurrence matrices by taking block differences between the consecutive frames in each of R, G, and B plane, using sum of absolute differences (SAD). Feature vectors are extracted from the co-occurrence matrices' statistics, defined at various pixel displacement distances. The statistical find-outs are integrated into a training set and an unsupervised classifier, K-means, is used to identify the shot-frames and the non-shot frames.