Continuous updating gmm

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相关滤波类方法从一开始能被我盯上,就是因为速度比较快,不管哪个CV算法,速度都是重要的指标之一,tracking问题尤甚,工业应用永远把速度排在性能之前,学术论文速度快永远是tracker的亮点之一。速度测试:以前文章介绍了很多state of the art的相关滤波类目标跟踪算法,而且我都会着重强调每个算法的速度怎么样,这里紧接着上一篇,在OTB-2015上将以往介绍的所有real-time tracker跑一下,一起比比看,包括以下几个算法:" data-rawwidth="1189" class="origin_image zh-lightbox-thumb lazy" width="1189" data-original="https://pic3.zhimg.com/v2-994dcad41b8e9f79deb1195037e978f6_r.jpg" data-actualsrc="https://pic3.zhimg.com/v2-994dcad41b8e9f79deb1195037e978f6_b.jpg"再补充几个论文数值作为参考:Struck 0.460 & 20fps,TLD 0.425 & 30fps,OAB 0.365 & 22fps;BACF 0.630 & 35fps, CSR-DCF 0.587 & 13fps,LMCF 0.568 & 80fps;结果分析:总体情况就是这样,SAMF是14年的性能baseline,SRDCF是15年的性能baseline,CSK、DAT(c )和DCF都能到400fps以上,从CSK开始速度越来越慢,LCT和SRDCF比较慢,f DSST和Staple接近80fps非常优秀,2017`CVPR的ECO-HC和STPALE CA都在43fps。分析几点:要在这里点题了:将相关滤波跟踪算法的速度做到极致。-------------------------------------------丑陋的分割线------------------------------------------看过我以前文章的同学都应该记得,影响相关滤波类跟踪算法速度的关键因素是三维。。当然是特征的三维,在介绍KCF的时候分析过,对于三维是m*n*d的特征,算法的复杂度是 O(d*m*n*log(m*n) ),m*n是特征的分辨率,d是特征通道数,算法加速的有效方法之一是降低特征的三维,但降低三维会大幅影响算法的性能,所以难点是如何在保证算法performance的情况下降维;另一种方法是算法的简化或优化,适合SRDCF这种比较复杂的算法。CN2:" data-rawwidth="828" class="origin_image zh-lightbox-thumb lazy" width="828" data-original="https://pic4.zhimg.com/v2-12de76ca468e621d065df0aa8e57f295_r.jpg" data-actualsrc="https://pic4.zhimg.com/v2-12de76ca468e621d065df0aa8e57f295_b.jpg"ECO是C-COT的加速版,从模型大小、样本集大小和更新策略三个方便加速,速度比C-COT提升了20倍,加量还减价,在VOT2016数据库上EAO提升了13.3%,当然最厉害的还是hand-crafted features版本的ECO-HC有60FPS,接下来分别看看这三步。第一减少模型参数,既然CN特征和HOG特征都能降维,那卷积特征是不是也可以试试?这就是ECO中的加速第一步,也是最关键的一步,Factorized Convolution Operator分解卷积操作,效果类似PCA,但Conv.

Internet Protocol television (IPTV) is the delivery of television content over Internet Protocol (IP) networks.

IPTV services may be classified into three main groups: Historically, many different definitions of IPTV have appeared, including elementary streams over IP networks, transport streams over IP networks and a number of proprietary systems.

One official definition approved by the International Telecommunication Union focus group on IPTV (ITU-T FG IPTV) is: IPTV is defined as multimedia services such as television/video/audio/text/graphics/data delivered over IP based networks managed to provide the required level of quality of service and experience, security, interactivity and reliability.

In 2008, PTCL (Pakistan Telecommunication Company Limited) launched IPTV under the brand name of PTCL Smart TV in Pakistan.

This service is available in 150 major cities of the country offering 140 live channels and more than 500 titles for VOD with key features such as: In 2016, KCTV (Korean Central Television) introduced the Set-top box called "Manbang" (meaning ‘everywhere’ or ‘every direction’), claiming to provide video-on-demand services in North Korea via quasi-internet protocol television (IPTV).

The service became the reference for various changes to UK Government regulations and policy on IPTV.

A 2009 Nielsen survey found 99 percent of video viewing was done on TV.As a result, a client media player can begin playing the content (such as a TV channel) almost immediately. Although IPTV uses the Internet protocol it is not limited to television streamed from the Internet, (Internet television).IPTV is widely deployed in subscriber-based telecommunications networks with high-speed access channels into end-user premises via set-top boxes or other customer-premises equipment.Stating that the demands for the equipment are "particularly" high in Sinuiju, with several hundred users in the region.In December 2009, the FCC began looking into using set-top boxes to make TVs with cable or similar services into network video players.

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