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文章介绍了利用VcDemo演示视频编码和利用MATLAB视频和图像处理工具箱演示边缘检测等典型实例,阐述将课堂演示实验环节引入"多媒体通信"课程教学的必要性。 相似文献
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While the development of particular video segmentation algorithms has attracted considerable research interest, relatively little effort has been devoted to provide a methodology for evaluating their performance.In this paper, we propose a methodology to objectively evaluate video segmentation algorithm with ground-truth, which is based on computing the deviation of segmentation results from the reference segmentation.Four different metrics based on classification pixels, edges, relative foreground area and relative position respectively are combined to address the spatial accuracy.Temporal coherency is evaluated by utilizing the difference of spatial accuracy between successive frames.The experimental results show the feasibility of our approach.Moreover, it is computationally more efficient than previous methods.It can be applied to provide an offline ranking among different segmentation algorithms and to optimally set the parameters for a given algorithm. 相似文献
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While the development of particular video segmentation algorithms has attracted considerable research interest, relatively little effort has been devoted to provide a methodology for evaluating their performance. In this paper, we propose a methodology to objectively evaluate video segmentation algorithm with ground-truth, which is based on computing the deviation of segmentation results from the reference segmentation. Four different metrics based on classification pixels, edges, relative foreground area and relative position respectively are combined to address the spatial accuracy. Temporal coherency is evaluated by utilizing the difference of spatial accuracy between successive frames. The experimental results show the feasibility of our approach. Moreover, it is computationally more efficient than previous methods. It can be applied to provide an offline ranking among different segmentation algorithms and to optimally set the parameters for a given algorithm. 相似文献
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Depth estimation is an active research area with the developing of stereo vision in recent years. It is one of the key technologies
to resolve the large data of stereo vision communication. Now depth estimation still has some problems, such as occlusion,
fuzzy edge, real-time processing, etc. Many algorithms have been proposed base on software, however the performance of the computer configurations limits the software
processing speed. The other resolution is hardware design and the great developments of the digital signal processor (DSP),
and application specific integrated circuit (ASIC) and field programmable gate array (FPGA) provide the opportunity of flexible
applications. In this work, by analyzing the procedures of depth estimation, the proper algorithms which can be used in hardware
design to execute real-time depth estimation are proposed. The different methods of calibration, matching and post-processing
are analyzed based on the hardware design requirements. At last some tests for the algorithm have been analyzed. The results
show that the algorithms proposed for hardware design can provide credited depth map for further view synthesis and are suitable
for hardware design. 相似文献
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This paper analyzes the technical characteristic of three-dimensional display technology (3DTV) system and some core technologies
yet to be solved. It points out the ways to solve these problems and presents an effective solution for the discomfort of
watching the three-dimensional TV. 相似文献
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1 Introduction MPEG 4videocodingstandard providesobject basedfunctionalitiesbyintroducingtheconceptofvideoobject plane (VOP) .Withtheextractionofvideoobjectsandallocatingdifferentnumberofbitsordifferentframe ratesfordifferentobjects ,thestan dardcansupportobject basedscalabilitythatisusefulinmanypracticalapplications[1] .However,MPEG 4alwaysassumesthatthevideocontentstobecodedarewellrepresentedinvideoobjectswithoutmandatinganyspecifictechniques;sovideoobjectsegmentationbecomesanimportant… 相似文献
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针对电子阅览室经常出现的故障和问题，介绍本人在实践工作中所采取的对策及取得的点滴经验，对电子阅览室及公共机房维护有一定的参考价值。 相似文献
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