Browsing by Author "Chou, YM"

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A video coding algorithm based on image warping and nonrectangular DCT coding
(1997)
Chou, YM
;
Hang, HM
;
交大名義發表
;
電子工程學系及電子研究所
;
National Chiao Tung University
Object scalability is a new trend in video coding research. This paper presents an attempt of designing an object-oriented coding based on the notion of irregular mesh and image warping. Three techniques are employed: motion compensation based on image warping, image segmentation and object tracking based on (mesh) nodal point adjustment, and nonrectangular DCT coding performed on the irregular mesh. The preliminary simulation results of the PSNR values and the subjective coded image quality indicate that this coding scheme is suitable for object scalable coding at low bit rates.
Overlapped patch elimination algorithm for deformable mesh video coding
(1997-06-19)
Chou, YM
;
Hang, HM
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
Updating mesh nodal points is one of the major tasks in deformable mesh video coding. Owing to object movement and inexact motion estimation, nodal point tracking often results in overlapped patches. A noniterative nodal point processing algorithm is proposed to solve this problem. Simulation results indicate that with this overlapped patch elimination algorithm, the updated mesh can maintain a rather uniform distribution and the moving object can be traced quite well.