排序方式: 共有17条查询结果,搜索用时 62 毫秒
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基于快速搜索的运动目标检测算法 总被引:2,自引:0,他引:2
对高分辨率下的运动目标检测算法提出一种基于快速搜索的改进方案,通过对本方案的理论分析与实验研究,表明当运动目标在整个扫描图像中所占比例较小时,与一般算法相比,此方案可以有效地提高运动目标的检测速度,在本文的实验中提高100多倍。结果表明议价方案不仅能明显提高了检测的实时性,而且能给出更加精确的目标边界。 相似文献
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一种运动估计的快速搜索方法 总被引:1,自引:0,他引:1
本文提出了动态图像压缩中估计运动矢量的一种快速搜索算法。分析与实验表明,该算法的计算量大大低于二维全搜索,而匹配效果优于三步法等快速算法,目硬件实现简单。它适用于动态图像的实时编码。 相似文献
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无线高速链路快速可靠传输方法 总被引:1,自引:0,他引:1
在无线信道上,链路层选择性重传与TCP重传相比,可只对发生错误的部分链路帧重传,不需重传整个数据包,可以大大节约链路带宽资源。因此高速无线链路的应用需要一种高效率的发送与接收窗口控制方法。该方法将分组序号作为访问窗口结构数组的下标,并且联合应用预设表进行查找的搜索方法,实现了对窗口的高效率快速操作和对高速无线信道的数据传输支持。通过实验,验证了这种设计的有效性。 相似文献
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在大型数据集群网络中,业务逻辑节点和数据库节点分布在不同的地理位置,导致在该网络中创建或检索用户数据将经历较大的网络延迟.如何快速找到用户数据的地理位置节点(服务器识别号)将是减少网络延迟的关键.介绍一种动态索引算法,基于简单正则表达,建立用户数据和服务器组之间的映射关系,并引入动态多叉树,实现动态更改映射关系.引入一元组数据节点和二元组数据节点的概念,应用于多叉树,通过分析一元组多叉树和二元组多叉树的时间效率和空间效率,证明二元组多叉树随着树深的增长,检索时间复杂度保持更好的线性特性.通过一些性能测试的实验数据的比较,得出二元组方案的综合性能更优的结论.最后,简要地介绍该算法的应用领域. 相似文献
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In this paper,we proposed a novel Two-layer Motion Estimation (TME) which searches motion vectors on two layers with partial distortion measures in order to reduce the overwhelming computational complexity of Motion Estimation (ME) in video coding.A layer is an image which is derived from the reference frame such that the sum of a block of pixels in the reference frame determines the point of a layer.It has been noticed on different video sequences that many motion vectors on the layers are the same as those searched on the reference frame.The proposed TME performs a coarse search on the first layer to identify the small region in which the best candidate block is likely to be positioned and then perform local refined search on the next layer to pick the best candidate block in the located small area.The key feature of TME is its flexibility of mixing with any fast search algorithm.Experimental results on a wide variety of video sequences show that the proposed algorithm has achieved both fast speed and good motion prediction quality when compared to well known as well as the state-of-the-art fast block matching algorithms. 相似文献
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针对H.264运动估计模块的运算量较大的问题,业界已经提出各种改进的搜索算法.分析了几种基于H.264的典型快速搜索算法,提出了算法的改进思路. 相似文献
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Maher E. Rizkalla Paul Salama Mohamed El-Sharkawy Modukuri Sushmitha 《The Journal of VLSI Signal Processing》2007,49(1):139-159
This work describes the VHDL design and implementation of block-based motion estimation in order to make it feasible for real-time
video applications. The design was functionally tested and simulated using ModelSim from Mentor Graphics tools, and then verified
using both a VHDL testbench and the Matlab? Image processing tools. The design was tested for different image sizes at different
clock frequencies with varying block sizes and search areas. With a clock frequency of 400 MHz, the estimated time for motion
estimation for QCIF and CIF sequences shows the feasibility for real-time video-codec.
相似文献
Maher E. RizkallaEmail: |