期刊名称：International Journal of Computer Science & Technology
印刷版ISSN：2229-4333
电子版ISSN：0976-8491
出版年度：2013
卷号：4
期号：1
页码：160-165
语种：English
出版社：Ayushmaan Technologies
摘要：Design of image compression using discrete wavelet transform have been presented in this paper and Lifting schema of DWT has been recognized as a faster approach is used to perform the DWT to factorize the polyphase matrix of a wavelet filter into a sequence of alternating upper and lower triangular matrices and a diagonal matrix to achieve efficient compression. This leads to the wavelet implementation by means of banded-matrix multiplications. Algorithm follows a quantization approach that divides the input image in 4 filter coefficients and then performs further quantization on the lower order filter or window of the previous step. MATLAB software has been used to compress the input image. Qualitative analyses have been performed by obtaining the compressed version of the input image by DWT Technique and comparing it with the input image used. The compressed image has been reconstructed into an image similar to the original image by employing wavelet reconstruction. Quantitative analysis has been performed by checking attained Peak Signal to Noise Ratio (PSNR) and Compression Ratio of the compressed image.
关键词：Wavelet Analysis;Image Compression;Peak Signal to Noise Ratio;Wavelet Decomposition
