期刊名称：International Journal of Computer Science Issues
印刷版ISSN：1694-0784
电子版ISSN：1694-0814
出版年度：2011
卷号：8
期号：5
出版社：IJCSI Press
摘要：Equal bit rate is assigned to all tiles of an image when compressed with JPEG2000 standard. This bit rate is selected without taking information contents of the tiles into account. This results into poor performance of JPEG2000 standard for the tiles that have higher complexity. We can improve performance of JPEG2000 by assigning higher bit rates to complex tiles. An entropy based weighted bit rate allocation algorithm is proposed in this paper. Experimentations using the proposed method indicate an improvement of up to 2 dB in Peak Signal to Noise Ratio (PSNR) and up to 5.352% improvement in Relative Percentage Improvement (RPI) in PSNR in the JPEG2000 reconstructed images.
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