Dissertation > Excellent graduate degree dissertation topics show

The Research on Compression and Coding Based on Video Object

Author: LiLi
Tutor: SongGang
School: Shandong University
Course: Signal and Information Processing
Keywords: MPEG-4 Video object Video segmentation Motion estimation
CLC: TP391.41
Type: Master's thesis
Year: 2009
Downloads: 53
Quote: 0
Read: Download Dissertation

Abstract


MPEG-4 is an object-based and very open video compression and coding standard. It allows competition and improvement for the video segmentation, rate control and coding technology and so on. The key technologies of MPEG-4 are becoming the hotspot of study and development.Based on the research of the basic idea of MPEG-4 technology and the key algorithm, this paper emphasizes on the study of video objects segmentation and motion estimation and compensation technologies of MPEG-4.In the video segmentation part, a new segmentation approach based on spatio-temporal information is proposed. The new algorithm firstly selects four rank moment method to segment temporally to obtain the coarse mask of video object. Then it uses the spatial information to fine the result to improve the coarse boundary after temporal segmentation. The fining process proposes a cost function about the pictures transparency, according to the coarse mask and using the local smoothness and correlation property of the video sequence gray. By minimizing this cost function, the transparency of each pixel can be solved and the gray mask of video object can be obtained. Because of using both spatial and temporal information, the new algorithm improves the fault of the old method that the extracted outline is blur. The experiment shows that the result of the new algorithm is very accuracy.In the motion estimation and compensation part, Through research the classic motion estimation algorithm and the cross-diamond search algorithm, proposes an adaptive rood pattern search using the characteristic of different kinds of block with thinking about the features of the variable block-size motion estimation and the spatial-temporal correlation of motion vector. The new algorithm predicts the motion of the current block firstly and then chooses the pattern adaptively according the prediction result. It solves the disadvantage of single pattern in searching vertical moving objects and enables us to add the number of search points more efficiently and thus improves the search speed. Meanwhile, the new algorithm also adopts the advanced-stop criteria and linear search technology. Simulation Results show that the new algorithm can efficiently reduce the search time.

Related Dissertations

  1. Optimizing and Realising Research on Vedio Compression in TV Guidance System,TN919.81
  2. Preparation of Enrofloxacin Sustained-release Preparations and Its Pharmacokinetics,R96
  3. The Design and Implementation of the Single-chip MPEG2 Video Encoder,TN919.81
  4. Study on Side Information Generation in Distributed Video Coding,TN919.81
  5. Methods to Image and Video De-hazing,TP391.41
  6. Research and Implementation of MPEG-2 video digital watermarking,TP309.7
  7. Design and Implementation of Supervision Service, Command and Dispatch System for Frontier Defense,TP311.52
  8. Research on the Key Algorithm of MPEG-4 Video Coding and Bit Rate Control,TN919.81
  9. Simulation of Ground Motion on Fuzhou Basin,P315
  10. Research on Second Generation Video Watermarking Algorithms Based on Content Features,TP309.7
  11. Application Research on P2P Live Streaming Media Based on Watermarking Technology,TP309.7
  12. Research on Anti-Noise Matching Criteria of Motion Estimation,TP391.41
  13. Based on the Core Chip Kingdom DVB-C Set-top Box of Design and Implementation,TN948.55
  14. Application Research on Networks Video Server Based on H.264,TN919.81
  15. Research of Electronic Image Stabilization Algorithm Based on Improved Canny Edge-detection Operator,TP391.41
  16. Research on Digital Watermarking for MPEG-4 Using Low Density Parity Check Coding,TP309.7
  17. The Design of Network Video Monitor System Based on MPEG-4,TP277
  18. The Research of Video Watermarking and Authentication Based on MPEG-4 Video,TP309.7
  19. Research on Rotational Image Stabilization Algorithms for Electronic Image Stabilization System,TP391.41
  20. Theory and Application of Optimal Orthogonal Integer Transform Matrix for Video Compression,TP391.41
  21. The Design and Research of Wireless Video Monitoring System for MHG,TP277

CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
© 2012 www.DissertationTopic.Net  Mobile