Download Advanced Video Coding: Principles and Techniques: The by K.N. Ngan, T. Meier, D. Chai PDF

By K.N. Ngan, T. Meier, D. Chai

In recent times, the paradigm of video coding has shifted from that of a frame-based method of a content-based procedure, fairly with the finalization of the ISO multimedia coding commonplace, MPEG-4. MPEG-4 is the rising ordinary for the coding of multimedia content material. It defines a syntax for a collection of content-based functionalities, specifically, content-based interactivity, compression and common entry. notwithstanding, it doesn't specify how the video content material is to be generated. To generate the video content material, video should be segmented into video gadgets and tracked as they transverse around the video frames. This e-book addresses the tough challenge of video segmentation, and the extraction and monitoring of video item planes as outlined in MPEG-4. It then specializes in the categorical factor of face segmentation and coding as utilized to videoconferencing in an effort to increase the standard of videoconferencing photographs specially within the facial sector. Modal-based coding is a content-based coding process used to code man made items that experience develop into an incredible a part of video content material. It leads to super low bit charges simply because basically the parameters had to characterize the modal are transmitted. Model-based coding is incorporated to supply heritage details for the unreal item coding in MPEG-4. finally, MPEG-4, the 1st coding regular for multimedia content material is defined intimately. the themes coated contain the coding of audio gadgets, the coding of typical and artificial video items, and blunder resilience. complicated Video Coding is among the first books on content-based coding and MPEG-4 coding regular. It serves as an exceptional info resource and reference for either researchers and working towards engineers.

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Read or Download Advanced Video Coding: Principles and Techniques: The Content-based Approach (Advances in Image Communication, Volume 7) PDF

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Extra resources for Advanced Video Coding: Principles and Techniques: The Content-based Approach (Advances in Image Communication, Volume 7)

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Adjacent regions of a segmentation should have significantly different values with respect to the characteristic on which they are uniform. " Notice that the characteristic or similarity measure is a low-level feature such as color, intensity, or optical flow. Therefore, apart from very simple cases where the features directly correspond to objects, the resulting partitions do not have any semantical meaning attached to them. An interpretation of the scene must be obtained by a higher-level process, after the segmentation into primitive regions has been carried out.

The variations of these brightness patterns are perceived as apparent motion. Apparent motion can be characterized by a correspondence vector field or by an optical flow field. 44) For a sufficiently small At, the velocity can be approximated as being constant during that time interval. It follows that d(x) = u ( x ) . At, which means that the correspondence vector is proportional to the optical flow. If At is set to unity, optical flow and correspondence vectors can even be used interchangeably.

However, binary images can be viewed as a special case of images with two gray-levels. Therefore, we will here only consider gray-level operators. 3. 2, let L - {(x,y)ll _< x < M, 1 < y < N} denote a finite rectangular lattice of M • N pixels so that the gray-level image I(x, y) is defined on L. A partition A - {A1,... , Am} of L is then the set of disjoint connected components Ai such that the union of these components is equal to L; that is, tsm_lAi- L. Furthermore, a partition A - {A1,... ,Am} is finer than another partition B - {B1,...

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