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    • 10. 发明申请
    • Method for planar processing of wavelet zero-tree data
    • 小波零树数据的平面处理方法
    • US20050058358A1
    • 2005-03-17
    • US10883872
    • 2004-07-02
    • Joseph ZbiciakJagadeesh Sankaran
    • Joseph ZbiciakJagadeesh Sankaran
    • G06K9/36
    • H04N19/647
    • This invention is a method of embedded zero-tree wavelet encoding that operates on planarized wavelet coefficient data. Following wavelet transformation of image data, the wavelet coefficients are transformed into bit plane form. The threshold comparisons are thus converted into determination whether a corresponding bit in a bit plane data word corresponding to the threshold is “1” or “0”. The reduction of the threshold occurs by consideration of the bit plane data for the next most significant bit. Zero-tree node determinations are made by a bottom up ANDing of the bits for all descendant wavelet coefficients. This technique makes better use of memory bandwidth, cache and data processing capability by operating on only the needed data.
    • 本发明是对平坦化小波系数数据进行操作的嵌入式零树小波编码方法。 在图像数据的小波变换之后,小波系数被转换成位平面形式。 因此,阈值比较被转换为确定与阈值相对应的位平面数据字中的对应位是“1”还是“0”。 通过考虑下一个最高有效位的位平面数据来发生阈值的减小。 零树节点确定是通过对所有后代小波系数的比特的自下而上的AND进行的。 该技术通过仅对所需数据进行操作,从而更好地利用存储器带宽,缓存和数据处理能力。