适配分辨率动态变化的低复杂度视频场景切换检测方法

摘要

In digital video post processing of TV system,many video detection and enhancement IP blocks need refer temporal information between frames.For cutting off the temporal relationship when content scene change happens,an optimum design of scene change detector was proposed in this paper.According to the network TV dynamically changes the video resolutions based on the quality of network service,the design adopts an optimum method based on histogram distribution detection combined with dynamic weighting.The simulation results show that the design has improved the detection accuracy compares to the common design which is based on the average intensity level.And it improves the detection's reliability and stability for low IRE scenes and resolution dynamic change case of network TV programs.%在数字电视图像后处理中,许多图像增强和指标检测算法模块需要参考前后帧的时域信息,因此当场景内容发生切换时,需要设计出一种准确且可靠的场景切换检测的方法,用以切断场景切换前和场景切换后的各种时域算法的前后关联性.针对网络电视播放视频节目前后帧经常出现的分辨率变化的特性以及场景切换检测中常见的问题,对数字电视图像后处理中的视频场景切换检测算法进行了优化设计,提出了一种基于动态阶数控制直方图分布的优化检测算法.实验结果表明,相比传统算法,所提算法在场景切换检测的准确度上有显著的提升,针对暗场景下的场景切换以及网络电视中分辨率改变的情形具有较高的准确度.