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    • 3. 发明授权
    • Lifting-based directional lapped transforms
    • 基于提升的方向重叠变换
    • US08139880B2
    • 2012-03-20
    • US12054043
    • 2008-03-24
    • Ji-Zheng XuFeng Wu
    • Ji-Zheng XuFeng Wu
    • G06K9/36
    • H04N19/122G06F17/147H04N19/126H04N19/14H04N19/17H04N19/176H04N19/196H04N19/46H04N19/86
    • A “directional lapped transform coder” (“DLT Coder”) provides various techniques for designing directional lapped transforms. In general, lapped transforms are factorized into lifting steps. A “directional operator” is then introduced into each lifting step in order to construct the directional lapped transform by selecting data elements from a data signal along a path corresponding to the directional operator. The resulting directional lapped transform preserves the advantages of conventional lapped transforms while also providing more efficient representation directional signals. In various embodiments, the resulting directional lapped transform is used to enable an image/video coding scheme that provides significant improvement over conventional state-of-the-art image lapped transform based coding schemes for images with strong directional correlations.
    • “定向重叠变换编码器”(“DLT编码器”)提供了用于设计方向重叠变换的各种技术。 一般来说,重叠变换被分解为提升步骤。 然后将“定向操作符”引入每个提升步骤,以便通过沿着与定向操作符相对应的路径的数据信号选择数据元素来构造方向重叠变换。 所得到的定向重叠变换保留了常规重叠变换的优点,同时还提供更有效的表示方向信号。 在各种实施例中,所得到的方向重叠变换用于实现对于具有强方向相关性的图像的传统的基于现有技术的基于图像重叠变换的编码方案的显着改进的图像/视频编码方案。
    • 4. 发明申请
    • NON-DYADIC SPATIAL SCALABLE WAVELET TRANSFORM
    • 非二维空间可扩展小波变换
    • US20080123983A1
    • 2008-05-29
    • US11563629
    • 2006-11-27
    • Ruiqin XiongJi-Zheng XuFeng Wu
    • Ruiqin XiongJi-Zheng XuFeng Wu
    • G06K9/36
    • H04N19/635
    • A non-dyadic spatial scalable wavelet transform may scale an original digital video frame or digital image at a non-dyadic ratio. The digital video frame or digital image is quantized to create a set of data representing the digital video frame or digital image. The set of data is then input to the non-dyadic spatial scalable wavelet transform. The non-dyadic spatial scalable wavelet transform may then transform the data associated with a first pixel to a high-pass coefficient and use the high-pass coefficient to transform the data associated with a second and third pixel to low-pass coefficients. The low-pass coefficients may then be converted to a digital image for viewing.
    • 非二元空间可缩放小波变换可以以非二进制比例缩放原始数字视频帧或数字图像。 量化数字视频帧或数字图像以创建表示数字视频帧或数字图像的一组数据。 然后将该组数据输入到非二进制空间可缩放小波变换。 然后,非二元空间可缩放小波变换可以将与第一像素相关联的数据变换为高通系数,并使用高通系数将与第二和第三像素相关联的数据变换为低通系数。 然后可以将低通系数转换为数字图像以供观看。
    • 7. 发明授权
    • Non-dyadic spatial scalable wavelet transform
    • 非二元空间可缩放小波变换
    • US08244071B2
    • 2012-08-14
    • US11563629
    • 2006-11-27
    • Ruiqin XiongJi-Zheng XuFeng Wu
    • Ruiqin XiongJi-Zheng XuFeng Wu
    • G06K9/32G06K9/36
    • H04N19/635
    • A non-dyadic spatial scalable wavelet transform may scale an original digital video frame or digital image at a non-dyadic ratio. The digital video frame or digital image is quantized to create a set of data representing the digital video frame or digital image. The set of data is then input to the non-dyadic spatial scalable wavelet transform. The non-dyadic spatial scalable wavelet transform may then transform the data associated with a first pixel to a high-pass coefficient and use the high-pass coefficient to transform the data associated with a second and third pixel to low-pass coefficients. The low-pass coefficients may then be converted to a digital image for viewing.
    • 非二元空间可缩放小波变换可以以非二进制比例缩放原始数字视频帧或数字图像。 量化数字视频帧或数字图像以创建表示数字视频帧或数字图像的一组数据。 然后将该组数据输入到非二进制空间可缩放小波变换。 然后,非二元空间可缩放小波变换可以将与第一像素相关联的数据变换为高通系数,并使用高通系数将与第二和第三像素相关联的数据变换为低通系数。 然后可以将低通系数转换为数字图像以供观看。
    • 10. 发明申请
    • LIFTING-BASED DIRECTIONAL LAPPED TRANSFORMS
    • 基于LIFTING的方向快速变换
    • US20090238484A1
    • 2009-09-24
    • US12054043
    • 2008-03-24
    • Ji-Zheng XuFeng Wu
    • Ji-Zheng XuFeng Wu
    • G06K9/36
    • H04N19/122G06F17/147H04N19/126H04N19/14H04N19/17H04N19/176H04N19/196H04N19/46H04N19/86
    • A “directional lapped transform coder” (“DLT Coder”) provides various techniques for designing directional lapped transforms. In general, lapped transforms are factorized into lifting steps. A “directional operator” is then introduced into each lifting step in order to construct the directional lapped transform by selecting data elements from a data signal along a path corresponding to the directional operator. The resulting directional lapped transform preserves the advantages of conventional lapped transforms while also providing more efficient representation directional signals. In various embodiments, the resulting directional lapped transform is used to enable an image/video coding scheme that provides significant improvement over conventional state-of-the-art image lapped transform based coding schemes for images with strong directional correlations.
    • “定向重叠变换编码器”(“DLT编码器”)提供了用于设计方向重叠变换的各种技术。 一般来说,重叠变换被分解为提升步骤。 然后将“定向操作符”引入每个提升步骤,以便通过沿着与定向操作符相对应的路径的数据信号选择数据元素来构造方向重叠变换。 所得到的定向重叠变换保留了常规重叠变换的优点,同时还提供更有效的表示方向信号。 在各种实施例中,所得到的方向重叠变换用于实现对于具有强方向相关性的图像的传统的基于现有技术的基于图像重叠变换的编码方案的显着改进的图像/视频编码方案。