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    • 4. 发明申请
    • Curved wavelet transform for image and video compression
    • 用于图像和视频压缩的弯曲小波变换
    • US20050196060A1
    • 2005-09-08
    • US11068160
    • 2005-03-01
    • Demin WangLiang ZhangAndre Vincent
    • Demin WangLiang ZhangAndre Vincent
    • G06K9/36H04N7/26
    • H04N19/63H04N19/124H04N19/13H04N19/61H04N19/619
    • A curved wavelet transform and a related image/video compression system are disclosed. The curved wavelet transform (CWT) is carried out by applying one-dimensional (1-D) wavelet filters along curves, rather than along only horizontal and vertical directions. The image/video compression system includes a curve determination unit, a curved wavelet transform unit, a wavelet coefficient quantization unit, a wavelet coefficient coding unit, and a curve coding unit. The quantization and coding of the wavelet coefficients are related to the curves. In one embodiment, recursive wavelet filters are used for inverse wavelet decomposition. The system provides higher compression capability than conventional wavelet-based image compression systems.
    • 公开了一种弯曲小波变换和相关图像/视频压缩系统。 曲线小波变换(CWT)通过沿着曲线应用一维(1-D)小波滤波器而不是沿着水平和垂直方向进行。 图像/视频压缩系统包括曲线确定单元,弯曲小波变换单元,小波系数量化单元,小波系数编码单元和曲线编码单元。 小波系数的量化和编码与曲线相关。 在一个实施例中,递归小波滤波器用于逆小波分解。 该系统比传统的基于小波的图像压缩系统提供更高的压缩能力。
    • 5. 发明授权
    • Curved wavelet transform for image and video compression
    • 用于图像和视频压缩的弯曲小波变换
    • US07418144B2
    • 2008-08-26
    • US11068160
    • 2005-03-01
    • Demin WangLiang ZhangAndre Vincent
    • Demin WangLiang ZhangAndre Vincent
    • G06K9/36G06K9/46
    • H04N19/63H04N19/124H04N19/13H04N19/61H04N19/619
    • A curved wavelet transform and a related image/video compression system are disclosed. The curved wavelet transform (CWT) is carried out by applying one-dimensional (1-D) wavelet filters along curves, rather than along only horizontal and vertical directions. The image/video compression system includes a curve determination unit, a curved wavelet transform unit, a wavelet coefficient quantization unit, a wavelet coefficient coding unit, and a curve coding unit. The quantization and coding of the wavelet coefficients are related to the curves. In one embodiment, recursive wavelet filters are used for inverse wavelet decomposition. The system provides higher compression capability than conventional wavelet-based image compression systems.
    • 公开了一种弯曲小波变换和相关图像/视频压缩系统。 曲线小波变换(CWT)通过沿着曲线应用一维(1-D)小波滤波器而不是沿着水平和垂直方向进行。 图像/视频压缩系统包括曲线确定单元,弯曲小波变换单元,小波系数量化单元,小波系数编码单元和曲线编码单元。 小波系数的量化和编码与曲线相关。 在一个实施例中,递归小波滤波器用于逆小波分解。 该系统比传统的基于小波的图像压缩系统提供更高的压缩能力。