Dissertation > Excellent graduate degree dissertation topics show

A New ROI Compression Coding Method Based on SPIHT

Author: TanJuan
Tutor: DongYuNing
School: Nanjing University of Posts and Telecommunications
Course: Signal and Information Processing
Keywords: Image Compression Coding Wavelet Transform SPIHT Region of InterestCoding
CLC: TN919.81
Type: Master's thesis
Year: 2013
Downloads: 33
Quote: 0
Read: Download Dissertation

Abstract


In the application of image information, sometimes people pay close attention to some regionsof the image. These areas are the so called ROI (region of interest).Other parts are BG (background). In ROI è we can adopt low loss, or even lossless compression coding to achieve highquality of reconstructed image. But for BG, high compression ratio is executed. In low bit rateconditions, the ROI coding method can ensure high quality reconstruction of important ROI image.Also, the combination of existing image coding algorithms and ROI coding method can solve manyproblems in image processing, such as storage space and bandwidth limitations.There are some defects in the ROI compression algorithms based on SPIHT. The boundarybetween region of interest and back ground is too obvious, and the fusion of the two regions isn’tgood enough. In the SPIHT coding process, the coding methods treat all subbands equally, withoutany coefficient optimization. This may reduce the wavelet coefficients coding efficiency. This thesispresents an improved ROI coding method based on SPIHT. It improves the pre-processing of image,in order that the data integrity of ROI and BG can be maintained, thus the fusion between them maybe more natural. After wavelet decomposition, coefficient optimization is employed in lowfrequency subband, so that the recovery quality of ROI is improved under the same bit rate. In somespecific domain, attention to different areas of the back ground image may be different. Sohierarchical coding is adopted in BG.Through theoretical analysis and experimental simulation, the improved method has beenproved superior to traditional ROI algorithm. In the new coding system, the fusion between ROIand BG image is better. The quality of reconstructed ROI image is higher, and the back groundimage is processed by hierarchical coding, which better meets the demand of practical applications.

Related Dissertations

  1. Research on Image Compression and Implementation Using TMS320C6713 Based on SPIHT Algorithm,TP391.41
  2. Feature Extraction, Selection and Combination in Lipreading,TP391.41
  3. Research on Identification System of Cashmere and Wool Fiber,TS101.921
  4. Characteristics of sensory stimulation evoked,R318.0
  5. Network transmission ROI image coding algorithm,TN919.81
  6. Wavelet Transform with Applications in Data Processing of Bridge’s Deformation Observation,TP274
  7. Based on Contourlet Transform Digital Watermarking Method,TP309.7
  8. Image Fusion Algorithms Based on Multi-scale Analysis,TP391.41
  9. Feature Extraction Technologies Research and Implementation of 3D Models Based on Wavelet Transform,TP391.41
  10. An Algorithm on Clustering and Anomaly Detection for Multiple Data Streams,TP311.13
  11. Research on Information Hiding Based on Images,TP309.7
  12. Design and Implication of Image Compression System Based on Wavelet and DM6446,TP391.41
  13. Research on Three-dimensional Surface Splicing Method Based on Genetic Algorithm and the Wavelet Transformation,TP391.41
  14. Study on Medical Image Segmentation Method Based on Parametric Active Contour Models,TP391.41
  15. SOPC Design of Transient Power Quality Disturbances Detecting Based on Nios Ⅱ,TN47
  16. Based on Lifting Scheme Wavelet Packet Transform and Artificial Neural Network Wing-box Multi-damage Detection,V224
  17. An Empirical Study on the Relationship between the China Stock Index Futures and Spot Markets,F224
  18. Research on Design and Data Processing for Wireless Electrocardiogram Monitoring Systems,TP274
  19. The Study of Vibration Signal Analysis System Based on Wavelet Fractal Theory,TN911.6
  20. Research and Realization of Image Denoising Based on Wavelet Transform,TP391.41
  21. A Study Regarding to Organizational Identification and Simulation of Reality for Double-Organization Fabric,TS105

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Image communication, multimedia communication > Image coding
© 2012 www.DissertationTopic.Net  Mobile