As content based video indexing and retrieval has its foundations in the prime video structures, such as a shot or a scene, the algorithms for video partitioning have become crucial in contemporary development of digital video technology. Conventional algorithms for video partitioning mainly focus on the analysis of compressed video features, since the information relevant to the partitioning p...

Methods for object-based compression and composition of natural and synthetic video content are currently emerging in standards such as MPEG-4 and VRML. This paper describes novel techniques for compression of 2-D triangular mesh geometry and motion, enabling efficient representation and manipulation of video content. Specifically, mesh geometry is compressed by predictive coding of mesh node l...

Topic area: image and video processing and analysis / image and video coding Abstract. The influences of task and scene content on a viewer's subjective opinion of compressed video quality are investigated. A group of test subjects are presented with a number of compressed video clips, with or without an initial " task " instruction. Subjective quality ratings and selected eye movement tracking...

This paper presents an intelligent video sensor (IVS) and possible applications in traffic surveillance. The IVS combines video sensing with video processing and data communication. It will be realized as embedded system and captures a video stream, computes traffic information and transfers the compressed video stream and the traffic information to the base station.

The goal of image or video quality assessment is to evaluate if a distorted image or video is of a good quality by measuring the difference between the original and distorted images or videos. In this paper, to assess the visual quality of an arbitrary distorted image or a compressed video, visual features of the image or video are compared with those of the original image or video instead of d...

In order to allow users to use handheld devices accessing video information, such as downloading and playing video files, there is a need to downscale the compressed video into lower spatial resolution and lower transmission bit rate. In this work, transcoding the compressed H.263 video into low spatial-resolution is discussed and realized. To reduce the computation cost, motion vectors from th...

Mobile multimedia contents have been introduced in the market and their demand is growing every day due to the increasing number of mobile devices and the possibility to watch them at any moment in any place. These multimedia contents are delivered over different networks that are visualized in mobile terminals with heterogeneous characteristics. To ensure a continuous high quality it is desira...

Compressed digital video is one of the most important types of traac in future integrated services networks. It is dif-cult to support this class of traac since, on one hand, compressed video is bursty, while on the other hand, it requires performance guarantees from the network. The common belief is that we are unlikely to achieve a high network utilization while providing performance guarante...

The image sequence discrimination model we use models optical blurring and retinal light adaptation. Two parallel channels, sustained and transient, with different masking rules based on contrast gain control, are used. Performance of the model was studied for two tasks representative of a video communication system with versions of monochrome H.263 compressed images. In the first study, five i...

Abstract—Blocking artifacts severely reduce the visual quality of the image making it unpleasant to the viewer. Reduction of blocking artifacts is essential to render the compressed image or video acceptable to the human viewer. There is thus an obvious need for detecting these blocking artifacts in the low bit rate DCT based compressed images, as it plays an important role in the design, optim...