Title :
Content-Based Mesh Design and Occlusion Adaptive GOP Structure
Author :
Guo, Dabo ; Lu, Zhaoyang ; Hu, Xingxing
Author_Institution :
State Key Lab. of Integrated Service Networks, Xidian Univ., Xi´´an, China
Abstract :
2D mesh-based motion compensation can effectively eliminate blocking artifacts that are common in block matching. However, the main difficulty of the scheme is nodal trajectory in occlusion regions. Besides, mesh design is also important because it is related to the efficiency of motion compensation. This work firstly presents a more efficient and delicate algorithm to generate content-based Delaunay triangular mesh (DTM) which is adaptive to temporal activities in a video sequence. Moreover, a mesh-based nodal forward tracking scheme is proposed, in which local mesh structure is locally altered according to occlusion regions. Furthermore, in terms of trajectories of nodes the deformation of the mesh, the change of the content of the video can be perceived, which facilitates the adaptive assignment of GOP structure. The intra-frame of GOB can be assigned at the moment when there is an abrupt change in contents of pictures, e.g. an occluded object (objects) entering picture. The experimental results demonstrate the efficiency of the motion compensation and node tracking and adaptive GOP structure.
Keywords :
hidden feature removal; image matching; mesh generation; motion compensation; Delaunay triangular mesh; block matching; blocking artifacts; content-based mesh design; group of pictures; motion compensation; occlusion adaptive forward tracking; Design for disassembly; Digital images; Educational institutions; Intserv networks; Mesh generation; Motion compensation; Motion detection; Physics; Process design; Tracking; 2-D content-based mesh design; Adaptive GOP Structure; occlusion-adaptive forward tracking;
Conference_Titel :
Digital Image Processing, 2009 International Conference on
Conference_Location :
Bangkok
Print_ISBN :
978-0-7695-3565-4
DOI :
10.1109/ICDIP.2009.20