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- W1983595788 abstract "Adaptive directional wavelet transform is an effective alternative of the traditional 2-D wavelet transform for image coding. It is able to transform an image adaptively along diagonal orientations as well as conventional vertical/horizontal directions. However, it requires to transmit transform direction information to the decoder side. For image coding at very low bitrates, the bit budget of the direction information degrades a reconstructed image quality. In this paper, a method to construct a scalable bitstream for transform directions is presented. We utilize the fact that the matrix yielded by transform direction indices still contains the original image characteristics. The matrix is transformed by a block-lifting based DCT, then encoded by SPIHT to yield a scalable bitstream. Our method is effective for very low bitrate image coding, and is comparable to the non-scalable one for middle-to-high bitrates." @default.
- W1983595788 created "2016-06-24" @default.
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- W1983595788 date "2010-05-01" @default.
- W1983595788 modified "2023-09-24" @default.
- W1983595788 title "Direction scalability of adaptive directional wavelet transform: An approach using block-lifting based DCT and SPIHT" @default.
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- W1983595788 doi "https://doi.org/10.1109/iscas.2010.5537992" @default.
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