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Extraction of moving objects is an important and fundamental research topic for many video ap-plications. This paper addresses an unsupervised spatio-temporal segmentation scheme to extract moving objects from video sequences. The temporal segmentation localizes moving objects by comparing the motion vector of each block in each frame with the corresponding global motion vector estimated by an outlier rejection (OR) based method. Furthermore, the temporal compensation utilizing the temporal coherence of moving objects is considered in the temporal segmentation to solve the temporarily stopping problem. The detected moving regions usually have discontinuous boundaries and some holes. These regions are then compensated in the spatial domain. In the spatial segmentation, the watershed algorithm considering the global information improves the accuracy of segmentation in the spatial domain. The modified mean filter is presented to suppress some minima. By using a fusion module, moving objects are extracted. Experiments on various sequences have successfully demonstrated the validity of the proposed scheme. 相似文献
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温州市城区二期防洪堤纵向包括三大功能区,横向三个功能带,总长约390m。基于参加二期工程设计和实施的经历,介绍温州市城区二期景观防洪堤总平面布置的功能区划分、景观立面造型、横向、竖向布置以及桩基布置等主要设计思路,并对本工程嵌岩灌注桩的设计施工等关键技术问题进行综合论述,提出新型景观驳岸的设计原则和中浅埋深嵌岩灌注桩的设计要点 相似文献
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为探讨城市干道双向协调控制信号相位差优化方法,基于元胞传输模型(CTM),建立了车辆实际运行状态的城市干道交通流模型与城市干道信号协调控制相位差优化模型;采用免疫遗传算法,提出了使城市干道双向信号协调控制系统车辆总延误最小的最优相位差优化方法;运用MATLAB 7.0编程建立的实验平台,对该模型及其优化方法进行仿真验证。结果表明:该相位差优化方法得到的车辆平均延误分别比传统图解法、数解法减少26.2%,17.3%。 相似文献
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