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arXiv 1004.3276cs.CV
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基于小波包最优树的彩色图像压缩

Color Image Compression Based On Wavelet Packet Best Tree

Matoshri College of Engineering and Research Centre(马托什里工程与研究中心学院);University of Pune(浦那大学)

G. K. Kharate, V. H. Patil

摘要:

在图像压缩中,研究人员的目标是通过去除空间和光谱冗余来减少表示图像所需的比特数。近年来,离散小波变换和小波包变换已成为图像压缩的主流技术。小波变换是图像压缩的主要处理部分之一。压缩的结果根据所使用的小波的基和抽头而变化。提出了根据图像的性质选择合适的小波母函数,可以显著提高图像的质量和压缩比。提出了一种基于阈值熵的小波包最佳树增强行程长度编码的新方法。该方法由于不分解完整树,降低了小波包分解的时间复杂度。我们的算法选择的子带,其中包括基于阈值熵的重要信息。提出了一种改进的行程长度编码技术,它比RLE编码技术具有更好的效果。与JPEG-2000相比,该方法的效果更好。

英文摘要:

In Image Compression, the researchers' aim is to reduce the number of bits required to represent an image by removing the spatial and spectral redundancies. Recently discrete wavelet transform and wavelet packet has emerged as popular techniques for image compression. The wavelet transform is one of the major processing components of image compression. The result of the compression changes as per the basis and tap of the wavelet used. It is proposed that proper selection of mother wavelet on the basis of nature of images, improve the quality as well as compression ratio remarkably. We suggest the novel technique, which is based on wavelet packet best tree based on Threshold Entropy with enhanced run-length encoding. This method reduces the time complexity of wavelet packets decomposition as complete tree is not decomposed. Our algorithm selects the sub-bands, which include significant information based on threshold entropy. The enhanced run length encoding technique is suggested provides better results than RLE. The result when compared with JPEG-2000 proves to be better.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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