Scalable Segmentation-Based Coding of Video Sequences Addressing Content-Based Functionalities
نویسندگان
چکیده
In this paper. we address video scalability in the framework of a region-based coding system, allowing content-based functionalities. The proposed algorithm can construct scaled layers from a video sequence, each one with either fixed bit-rate or fixed quality, allowing content based manipulation. Two modes of operation have been defined: a supervised mode, that allows the user to select the objects to be coded in the enhacement layer, and an unsupervised mode, where this selection is done by the algoritm itself.
منابع مشابه
Automatic Video Object Segmentation from VOP
The video coding standard MPEG-4 is enabling content-based functionalities of a prior decomposition of sequences into video object planes (VOP) so that each VOP represents a semantic object. Therefore extraction of semantic objects is an important part. There are various coding tools: shape coding, motion estimation and compensation, texture coding, multifunctional coding, error resilience, spr...
متن کاملMultiresolution video object extraction fitted to scalable wavelet-based object coding
To enable content based functionalities in video processing algorithms, decomposition of scenes into semantic objects is necessary. A semi-automatic Markov random field based multiresolution algorithm is presented for video object extraction in a complex scene. In the first frame, spatial segmentation and user intervention determine objects of interest. The specified objects are subsequently tr...
متن کاملTraffic Scene Analysis using Hierarchical Sparse Topical Coding
Analyzing motion patterns in traffic videos can be exploited directly to generate high-level descriptions of the video contents. Such descriptions may further be employed in different traffic applications such as traffic phase detection and abnormal event detection. One of the most recent and successful unsupervised methods for complex traffic scene analysis is based on topic models. In this pa...
متن کاملAutomatic segmentation of moving objects in video sequences: a region labeling approach
The emerging video coding standard MPEG-4 enables various content-based functionalities for multimedia applications. To support such functionalities, as well as to improve coding efficiency, MPEG-4 relies on a decomposition of each frame of an image sequence into video object planes (VOPs). Each VOP corresponds to a single moving object in the scene. This paper presents a new method for automat...
متن کاملRegion - Based Video Coding UsingMathematical
| This paper presents a region-based coding algorithm for video sequences. The coding approach involves a time-recursive segmentation relying on the pixels ho-mogeneity, a region-based motion estimation, and motion compensated contour and texture coding. This algorithm is mainly devoted to very low bit rate video coding applications. One of the important features of the approach is that no assu...
متن کامل