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Biorthogonal Wavelet Filter- A Technique for Image Compression

Richa Kukreja, Harish Rohil

Abstract


In science and engineering areas such as image compression, image enhancement , speech recognization , wavelets has its special and remarkable place. Wavelets are well known transform methods in field of image compression. As the images take large storage space and long tansmission time, hen compression technique are needed[1]. The current compression system uses the Biorthogonal wavelet filter (Bior 4.4).In this paper we are going to modify existing Biorthogonal wavelet filter (Bior 4.4) to make it more energy preserving. Coefficients of bior 4.4 are modified to make them more energy preserving and to get high compression score. In this paper we analyze enhanced biorthogonal filter for image compression. For this we applied wavelet transform through different orders at 1 to 5 decomposition levels. Our results show that enhanced bior 4.4 preserves(retain) more energy and better compression score.

Keywords


Biorthogonal Wavelet Filter, Image Compression, Wavelet Transform, Thresholding.

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References


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