3DV quality model based depth maps for view synthesis in FTV system

Depth maps are used for synthesis virtual view in free-viewpoint television (FTV) systems.When depth maps are derived using existing depth estimation methods,the depth distortions will cause undesirable artifacts in the synthesized views.To solve this problem,a 3D video quality model base depth maps (D-3DV) for virtual view synthesis and depth map coding in the FTV applications is proposed.First,the relationships between distortions in coded depth map and rendered view are derived.Then,a precisely 3DV quali...     

Video retargeting using optimized crop-and-scale

Mobile devices are increasingly powerful in multimedia transmitting and browsing. However, the small screen and different aspect ratios of mobile devices lower visual quality while watching images or videos. Video retargeting is aim at fitting an existing video into arbitrary size and aspect ratio. Previous content-aware retargeting methods are mostly high computational cost, which limits their applications on the portable devices with low computation ability. In this paper, a new crop-and-scale approach is presented to adapt video to better suit the target display. We automatically find the optimal parameters of cropping window using the dynamic programming method, and then scale it to fit the target display. The cropping window can smoothly shift during a shot to follow the movement of important objects. The retargeting results using our approach introduce no deformation and jitter effects over the whole video. Experimental results show the success of our approach on adapting a variety of source videos to small display sizes.     

Adaptive early termination of fast mode decision in MVC based on inter-view correlation

Variable size motion estimation (ME) and disparity estimation (DE) are employed to select the best coding mode for each macroblock (MB) in the current joint multiview video model (JMVM).This technique achieves the highest possible coding efficiency,but it results in extremely large computation complexity which obstructs the multiview video coding (MVC) from practical application.This paper proposes an adaptive early termination of fast mode decision algorithm for MVC.It makes use of the coding information o...     

远程教育"转型期"中实现电大可持续发展的思考

面对着中国教育"转型期"的到来,开放远程教育为了得到主流体制的认同与接纳,摆脱在高等教育资源重组过程中被继续"边缘化"的处境,纷纷与其他办学实体合并来整合教育资源.教育资源的调整为电大发展提供了机遇,也带来很大的挑战.面对这些问题,只有客观分析其产生的原因,才能提出切实可行的解决途径,从而为电大的可持续发展提供借鉴.     

用社会学的理论解读专职哭丧人现象

哭丧是一种古老的丧葬习俗,是一种以哭的形式来表达哀思的礼俗。资料显示,挽歌入礼,在汉晋时代兴起,到南北朝时更加流行。专职哭丧人现象可以用社会学的有关理论来解读。     

从"程菲跳"看世界女子跳马的发展特点

以"程菲跳"和第38届世界体操锦标赛跳马决赛运动员为主要对象,研究了世界女子跳马动作发展的主要特点.结果表明"程菲跳"是吸取了国内、外男女跳马发展成果的一次创新;程菲以较大优势获得跳马金牌是动作难度、优选动作类型和完美质量等多种因素的最佳组合.     

听力翻转课堂教学模式设计

翻转课堂即转变传统的教学模式,通过对教学结构的颠倒安排,重构教学流程,对英语听力教学有重要启示。该文通过实践教学,设计构建出适合听力翻转课堂的教学模式设计,以期在一定程度上对英语专业听力教学改革提供一些参考价值。     

从出土简帛看战国私家藏书

因战国私家藏书文献资料阙如,故学界对战国藏书史的研究成果不多。但随着考古工作的深入,大量的出土文献如甲骨文、青铜器铭文及简帛等为研究战国私家藏书提供了新史料,出土实物对于简帛的产生年代提供了基本证据。战国简帛多为私文书和私家藏书,这些简帛以郭店楚简、上博简及清华简为代表。战国私人藏书繁荣的背后有深刻的历史原因,出土简帛对于战国藏书有着重大意义。     

教师隐性知识显性化的障碍及对策研究简

隐性知识是超越显性知识的更深层次的知识。教师拥有大量的显性知识和隐性知识,教师隐性知识是影响学校教育教学的重要因素。分析影响教师隐性知识显性化的障碍,探寻教师隐性知识显性化的有效方法,对提高学校教育教学绩效和促进教师专业化发展具有重要的意义。     

村镇自来水分时段变频调速多级恒压控制

针对目前村镇自来水厂供水泵采用变频器驱动时PID调节器只有一个给定值的恒压控制的情况,提出了采用分时段多个压力设定值的变压力控制方法,并以两台供水泵为例,给出了相应的电气主电路及控制电路原理图,设置了变频器的相关参数,对供水压力的设定方法作了说明。实际运行表明,供水系统渗漏减少,可靠性提高,更节能,值得推广。