Evaluation of Wavelet Filters for Image Compression

The aim of this paper to characterize a larger set of wavelet functions for implementation in a still image compression system using SPIHT algorithm. This paper discusses important features of wavelet functions and filters used in sub band coding to convert image into wavelet coefficients in MATLAB. Image quality is measured objectively using peak signal to noise ratio (PSNR) and its variation with bit rate (bpp). The effect of different parameters is studied on different wavelet functions. Our results provide a good reference for application designers of wavelet based coder.

Authors:

• G. Sadashivappa
• K. V. S. AnandaBabu

Keywords:

• Wavelet
• image compression
• sub band
• SPIHT
• PSNR.

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