ABSTRACT
An improved quadtree classification and TCQ (QTCQ) wavelet image compression method is proposed in this paper. The method applies small block DCT to coefficients in the high frequency subbands and reorders them before quantizing and coding. Experiments results show that the proposed method outperforms QTCQ and other state-of-the-art wavelet coding methods. For example, for Barbara image, at 0.5 bit/pixel, this algorithm outperforms QTCQ, SPIHT, SLCCA and JPEG2000 by 0.4dB, 1.04dB, 0.54dB and 0.17dB in PSNR, respectively. It is also observed that this algorithm works extremely well for textured images like fingerprint images.
- Banister, B. A. and Fischer, T. R. Quadtree Classification and TCQ Image Coding. IEEE Trans. Circuits System Video Technology, 11, 1 (Jan. 2001), pp.3--8. Google ScholarDigital Library
- Chai, B., Vass, J. and Zhuang, X.H. Significance-Linked Connected Component Analysis for Wavelet Image Coding. IEEE Trans. Image Processing, 8, 6 (Jun.1999), pp. 774--784. Google ScholarDigital Library
- http://stargate.ecn.purdue.edu/~ips/tutorials/j2k/Google Scholar
- Wang, J., Zhang, W.J. and Yu, S.Y. Wavelet coding method using small block DCT. IEE Electronics Letters Online NO: 20010428, pp. 627--628, 2001.Google ScholarCross Ref
- Said, A. and Pearlman, W.A. A new, fast, and efficient image codec based on set partitioning in hierarchical trees. IEEE Transactions on Circuits and Systems for Video Technology, 6, 3 (June 1996), pp. 243--250. Google ScholarDigital Library
- Servetto, S., Ramchandran, K. and Orchard, M.T. Image coding based on morphological representation of wavelet data. IEEE Trans. Image Processing, 8,9 (Sep. 1999), pp. 1161--1173. Google ScholarDigital Library
- Shapiro, J.M. Embedded image coding using zerotrees of wavelet coefficients. IEEE Transactions on Signal Processing, 41, 12 (Dec. 1993), pp. 3445--3462.Google ScholarDigital Library
Index Terms
- An improved QTCQ wavelet image coding method using DCT and coefficient reorganization
Recommendations
Stack-run coding with space-frequency quantization
ICIP '97: Proceedings of the 1997 International Conference on Image Processing (ICIP '97) 3-Volume Set-Volume 1 - Volume 1The choice of quantization method in wavelet image compression is a crucial issue that affects performance, quality, and system design. Space-frequency scalar quantization of zero-trees achieves excellent coding efficiency. Stack-run coding is an ...
HDTV coding using hybrid MRVQ/DCT
The authors develop a technique to compress HDTV images to below 135 Mb/s at transparent quality, i.e., visually indistinguishable from the original. This is at least equal to the contribution quality. The proposed scheme consists of a lossy and a ...
A DCT-based embedded image coder using wavelet structure of DCT for very low bit rate video codec
This paper presents an efficient DCT-based embedded image coder designed for I(intra)-frame coding in a very low bit rate video codec. Motivated by the recognition that a DCT (discrete cosine transform) on N×N blocks of an image can be viewed as a ...
Comments