Motion-Based Selection of Relevant Video Segments for Video Summarization

We present a method for motion-based video segmentation and segment classification as a step towards video summarization. The sequential segmentation of the video is performed by detecting changes in the dominant image motion, assumed to be related to camera motion and represented by a 2D affine model. The detection is achieved by analysing the temporal variations of some coefficients of the 2D affine model (robustly) estimated. The obtained video segments supply reasonable temporal units to be further classified. For the second stage, we adopt a statistical representation of the residual motion content of the video scene, relying on the distribution of temporal co-occurrences of local motion-related measurements. Pre-identified classes of dynamic events are learned off-line from a training set of video samples of the genre of interest. Each video segment is then classified according to a Maximum Likelihood criterion. Finally, excerpts of the relevant classes can be selected for video summarization. Experiments regarding the two steps of the method are presented on different video genres leading to very encouraging results while only low-level motion information is considered.     

Motion-Based Video Representation for Scene Change Detection

In this paper, we present a new framework to automatically group similar shots into one scene, where a scene is generally referred to as a group of shots taken place in the same site. Two major components in this framework are based on the motion characterization and background segmentation. The former component leads to an effective video representation scheme by adaptively selecting and forming keyframes. The later is considered novel in that background reconstruction is incorporated into the detection of scene change. These two components, combined with the color histogram intersection, establish our basic concept on assessing the similarity of scenes.     

用户产生内容

用户产生（User．generated）内窖是当前国际主流媒体兴起的一种思路．即在编辑的规范和指导下．把内容的产生过程交付到用户手上,让用户获得主语权。这有点类似于Web2.0的思路．就像控制工程网一直强调的内窖交互性和参与性。     

数码摄像机

能有幸亲临奥运赛场,那么绝对有必要带上一台摄像机去记录令人振奋的时刻,毕竟摄像机拍摄体现热烈气氛的能力是照相机所不能及的。如果有幸入场参观并准备携带摄像机进行拍摄,那么我们有些建议可以供你参考。如果您现在还没有购买数码摄像机,那么我们强烈推荐您购买具备高清拍摄能力的产品。     

视像中的摄像机运动检测

摄像机的运动信息是视像内容检索中的一种重要特征。文中介绍了两种基于全局运动的摄像机运动检测方案。首先提取视像中的运动特征作为原始数据，然后分别使用了迭代最小二乘法和支持向量机分类的方法进行摄像机运动的检测，通过对试验结果的对比，前一种方案可更有效地完成摄像机运动类型的判断。     

视像中的摄像机运动检测

摄像机的运动信息是视像内容检索中的一种重要特征。文中介绍了两种基于全局运动的摄像机运动检测方案。首先提取视像中的运动特征作为原始数据,然后分别使用了迭代最小二乘法和支持向量机分类的方法进行摄像机运动的检测,通过对试验结果的对比,前一种方案可更有效地完成摄像机运动类型的判断。     

智能摄像显示器 三星2463uM视频我做主

在业界有着液显之王之称的三星显示器,已经在中国市场连续九年市场占有率和销量排行第一。对技术不间断地追求,令其一直在显示器领域处在领跑的位置。据记者了解到的最新信息,三星企业即将推出首款带有人工智能摄像头的显示     

基于用户关注空间与注意力分析的视频精彩摘要与排序

文中提出一种基于用户关注空间与注意力分析的视频内容理解方法,该方法可以有效地获得多通道的视频关注信息,并可使用户根据个性化需求定制视频关注内容,实现视频的高效浏览与访问.首先采用基于二叉层次型结构与分类器选择的音频分类算法将视频中的主要声音类型分类,然后将视频中影响用户注意力的视觉、听觉、时序因素定义为用户关注空间,分别使用相应的中层特征在这三个方面对用户注意力进行表示并计算其关注度,从而在音视频底层特征与高层认知之间建立有机过渡.作者设计了顺序决策融合算法来融合视觉与听觉关注度,生成关注度时序变化曲线并获得精彩摘要.最后使用支持向量回归模型并引入相关反馈机制来实现用户个性化的精彩片段排序.该项工作的特点是通过建立符合人类认知规律的关注度模型并结合相关反馈技术,对视频内容进行类人理解.实验证明,该方法对提取与生成符合用户个性化要求的视频摘要及排序结果具有良好的效果.     

家庭影视系统设计之用户分析

这一课题的研究方向将结合科学、系统的用户分析,为家庭影视系统探索未来的发展趋势。通过从使用者,观察者,拥有者三个层面进行切入,分析其物理和心理因素,并与产品设计相结合。目的是改善家庭影视系统的结构,拓展外型设计空间,选择色彩和材质。最终改变家庭娱乐生活的方式,提高生活品质。     

基于Video Port的Camera Link的图像采集接口设计

通过视频接口和Channel Link芯片实现了数字信号处理芯片TMS320DM642与Camera Link线扫描相机的无缝连接。解决了图像数据输出速度为40 MB/s的高速图像数据采集系统中,前端采集与后端输出的速度匹配问题。系统可实时、高速地采集大量的图像数据。     

An Adaptive Motion-Based Unequal Error Protection Approach for Real-Time Video Transport Over Wireless IP Networks

In this work, we consider the delivery of digital video over future 3G wireless IP networks and we propose a low-complexity adaptive motion-based unequal error protection (UEP) video coding and transmission system which efficiently combines three existing error-resilience techniques by exploiting knowledge of the source material as well as the channel operating conditions. Given this information, the proposed system can adaptively adjust the operating parameters of the video source encoder and the forward error correction (FEC) channel encoder to maximize the delivered video quality based upon both application-layer video motion estimates and link-layer channel estimates. We demonstrate the efficacy of this approach using the ITU-T H.264 video source coder. The results indicate that a significant performance improvement can be achieved with enhanced resilience to inaccurate channel feedback information and with substantially reduced computational complexity compared to competing approaches.     

Panoramic Video from Unstructured Camera Arrays

We describe an algorithm for generating panoramic video from unstructured camera arrays. Artifact‐free panorama stitching is impeded by parallax between input views. Common strategies such as multi‐level blending or minimum energy seams produce seamless results on quasi‐static input. However, on video input these approaches introduce noticeable visual artifacts due to lack of global temporal and spatial coherence. In this paper we extend the basic concept of local warping for parallax removal. Firstly, we introduce an error measure with increased sensitivity to stitching artifacts in regions with pronounced structure. Using this measure, our method efficiently finds an optimal ordering of pair‐wise warps for robust stitching with minimal parallax artifacts. Weighted extrapolation of warps in non‐overlap regions ensures temporal stability, while at the same time avoiding visual discontinuities around transitions between views. Remaining global deformation introduced by the warps is spread over the entire panorama domain using constrained relaxation, while staying as close as possible to the original input views. In combination, these contributions form the first system for spatiotemporally stable panoramic video stitching from unstructured camera array input.     

经济型无线网络摄像机

@@@@小型商店，精品店，办公室以及住宅用户都在寻找一种容易安装且价格实惠的网络摄像机。经济适用的小型 AXIS M1004-W网络摄像机，带有无线功能以及安讯士独特的一键摄像机连接功能（One-Click Camera Connec-tion），非常适用于这些小型场所的监控需求。     

Consistent Video Filtering for Camera Arrays

Visual formats have advanced beyond single‐view images and videos: 3D movies are commonplace, researchers have developed multi‐view navigation systems, and VR is helping to push light field cameras to mass market. However, editing tools for these media are still nascent, and even simple filtering operations like color correction or stylization are problematic: naively applying image filters per frame or per view rarely produces satisfying results due to time and space inconsistencies. Our method preserves and stabilizes filter effects while being agnostic to the inner working of the filter. It captures filter effects in the gradient domain, then uses input frame gradients as a reference to impose temporal and spatial consistency. Our least‐squares formulation adds minimal overhead compared to naive data processing. Further, when filter cost is high, we introduce a filter transfer strategy that reduces the number of per‐frame filtering computations by an order of magnitude, with only a small reduction in visual quality. We demonstrate our algorithm on several camera array formats including stereo videos, light fields, and wide baselines.     

HDTV子弹型网络摄像机

@@@@安讯士网络通讯公司日前推出了 AXIS M2014-E网络摄像机，该产品是一款紧凑的 HDTV 子弹型摄像机，具有极强的灵活性且易于安装，是在室内及半室外环境下进行视频监控最为理想的解决方案，尤其是对于要将摄像机暴露在雨中或水中的监控场所。     

飞利浦SPC650NC摄像头

飞利浦SPC650NC采用流线型设计,外观为黑色和银色双色搭配朴实无华.它由机身和底座两部分组成,值得一提的是底座不但能给机身提供良好的支撑,当拔下机身时,它还可以作为USB端口使用,方便用户连接各种USB接口设备.     

Single Sensor Compressive Light Field Video Camera

This paper presents a novel compressed sensing (CS) algorithm and camera design for light field video capture using a single sensor consumer camera module. Unlike microlens light field cameras which sacrifice spatial resolution to obtain angular information, our CS approach is designed for capturing light field videos with high angular, spatial, and temporal resolution. The compressive measurements required by CS are obtained using a random color-coded mask placed between the sensor and aperture planes. The convolution of the incoming light rays from different angles with the mask results in a single image on the sensor; hence, achieving a significant reduction on the required bandwidth for capturing light field videos. We propose to change the random pattern on the spectral mask between each consecutive frame in a video sequence and extracting spatio-angular-spectral-temporal 6D patches. Our CS reconstruction algorithm for light field videos recovers each frame while taking into account the neighboring frames to achieve significantly higher reconstruction quality with reduced temporal incoherencies, as compared with previous methods. Moreover, a thorough analysis of various sensing models for compressive light field video acquisition is conducted to highlight the advantages of our method. The results show a clear advantage of our method for monochrome sensors, as well as sensors with color filter arrays.     

Live Video Montage with a Rotating Camera

High‐quality video editing usually requires accurate layer separation in order to resolve occlusions. However, most of the existing bilayer segmentation algorithms require either considerable user intervention or a simple stationary camera configuration with known background, which is difficult to meet for many real world online applications. This paper demonstrates that various visually appealing montage effects can be online created from a live video captured by a rotating camera, by accurately retrieving the camera state and segmenting out the dynamic foreground. The key contribution is that a novel fast bilayer segmentation method is proposed which can effectively extract the dynamic foreground under rotational camera configuration, and is robust to imperfect background estimation and complex background colors. Our system can create a variety of live visual effects, including but not limited to, realistic virtual object insertion, background substitution and blurring, non‐photorealistic rendering and camouflage effect. A variety of challenging examples demonstrate the effectiveness of our method.     

飞利浦SPC650NC摄像头

飞利浦SPC650NC采用流线型设计,外观为黑色和银色双色搭配朴实无华.它由机身和底座两部分组成,值得一提的是底座不但能给机身提供良好的支撑,当拔下机身时,它还可以作为USB端口使用,方便用户连接各种USB接口设备.