Fast and efficient spatial scalable image compression using wavelet lower trees
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Cites background from "Fast and efficient spatial scalable..."
...Wavelets however, are ill suited to represent oscillatory patterns [13, 14]....
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32 citations
Cites background from "Fast and efficient spatial scalable..."
...At the same time, BCWT provides desirable features such as low complexity, low memory usage, and resolution scalability....
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30 citations
Cites background from "Fast and efficient spatial scalable..."
...Furthermore, there are increasingly common applications where one may not be able to afford the additional temporal and computational complexity required for rate scalability....
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...Now, the coded information for the tree with two resolu- tion scales will be where , , , are root coefficients of each subtree....
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...Therefore, it is a good idea to predict the dynamic range of each subtree based on the dynamic range of a parent tree, as shown in Fig....
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References
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5,890 citations
"Fast and efficient spatial scalable..." refers background in this paper
...According to the image size and the bit-rate, it is able to encode an image up to 8.5 times faster than JASPER and 2.5 times faster than SPIHT....
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...Table 3 shows as our algorithm greatly outperforms SPIHT and JASPER in terms of execution time....
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...Its compression performance is within the state-of-the-art, outperforming the typically used algorithms (SPIHT is improved in 0.2-0.4 dB, and JPEG 2000 with Lena in 0.35 dB as mean value)....
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...Lena coding Lena decoding codec\ rate SPIHT JASPER / JPEG 2000 LTW SPIHT JASPER / JPEG 2000 LTW 2 210.4 278.5 92.4 217.0 108.8 85.0 1 119.4 256.1 62.4 132.7 72.3 47.1 0.5 72.3 238.2 46.7 90.7 51.4 27.1 0.25 48.7 223.4 38.9 69.9 38.1 17.4 0.125 36.8 211.3 34.7 59.7 31.1 12.3...
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...Notice that only SPIHT and JASPER have been compared to LTW because the compiled versions of the rest of coders have not been released....
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5,559 citations
"Fast and efficient spatial scalable..." refers background in this paper
...One of the first efficient wavelet image coders reported in the literature is the EZW [3]....
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...The Embedded Zero-Tree Wavelet coder (EZW) can be considered as the first Wavelet image coder that broke that trend....
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3,925 citations
"Fast and efficient spatial scalable..." refers methods in this paper
...The most commonly used dyadic decomposition in image compression is the hierarchical wavelet subband transform [8], therefore an element Cc ji ∈, is called transform coefficient....
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2,322 citations