실시간 이미지 프로세싱을 위한 계수분할 웨이브릿 패킷 이미지 코더 알고리즘 연구 = WAVELET PACKET IMAGE CODER FOR REAL-TIME IMAGE APPLICATIONS USING COEFFICIENTS PARTITIONING

다국어 초록 (Multilingual Abstract)

In this paper, new embedded wavelet packet image coder algorithm is proposed for effective image coder using correlations between coefficients partition. This new algorithm presents parent-child relationships for reducing image reconstruction error using relations between each frequency subbands. By parent-child relationships, each coefficient are partitioned and encoded for the zerotree data structure. It is shown that the proposed wavelet packet image coder algorithm achieves low bit rates and rate-distortion. The simulations also demonstrate higher PSNR under the same bit rate and improved image compression time and perfect rate control compare with present methods. From these results, it is shown that the encoding and decoding process of proposed coder are much simpler and accurate than present method against texture images, which include many mid-frequency elements. And it is demonstrated possibility that it can be applied to real-time vision system, on-line image processing and image fusion which required smaller file and better resolution.

목차 (Table of Contents)

• ABSTRACT
• Ⅰ. INTRODUCTION
• Ⅱ. WAVELET PACKET IMAGE CODER ALGORITHM
• 1. Wavelet Packet Transform
• 2. EZW and SPIHT Algorithm
• Ⅲ. Coefficient Partitioning Wavelet Packet Coder Algorithm
• 1) Structure of proposed coder
• 2) New parent-child algorithm for proposed algorithm
• 3) Coefficient partitioning sucessive quantization algorithm
• Ⅳ. EXPERIMENTAL RESULTS
• Ⅴ. CONCLUSIONS
• ［REFERENCES］