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    Method and apparatus for decoding images
    3.
    发明公开
    Method and apparatus for decoding images 有权
    Verfahren und Vorrichtung zur dekodierung von Bildern

    公开(公告)号：EP2270717A1

    公开(公告)日：2011-01-05

    申请号：EP10179263.8

    申请日：1998-09-15

    申请人： University of Maryland ,  Mitsubishi Electric Corporation

    发明人： Atsumi, Eiji ,  Farvardin, Nariman

    IPC分类号： G06K9/36 ,  H04N7/26

    CPC分类号： H04N19/649 ,  H04N19/115 ,  H04N19/127 ,  H04N19/129 ,  H04N19/146 ,  H04N19/147 ,  H04N19/162 ,  H04N19/167 ,  H04N19/17 ,  H04N19/30 ,  H04N19/36 ,  H04N19/61 ,  H04N19/63 ,  H04N19/645 ,  H04N19/647 ,  H04N19/70

    摘要： Information representing an image is decoded by method an apparatus wherein information including digital data representing an image and digital data concerning at least one region of interest in the image is received,) an encoded bit stream is entropy decoded starting from a bit field of a higher bit significance level and continuing down to the bit field of a lower bit significance level to obtain transform coefficients, the transform coefficients corresponding to the region of interest are scaled down to place the transform coefficients in lower bit significance level planes, wherein the lowest bit plane of the region of interest is placed at the same bit plane as the lowest bit plane of the other transform coefficients, and an inverse wavelet transform is performed in order to reconstruct the digital image data.

    摘要翻译： 通过方法对表示图像的信息进行解码，其中接收包括表示图像的数字数据和关于图像中的至少一个感兴趣区域的数字数据的信息的装置，编码比特流从较高的比特场开始被熵解码 比特显着性级别并继续下降到较低位有效级别的位字段以获得变换系数，对应于感兴趣区域的变换系数被缩小以将变换系数置于低位显着性电平平面中，其中最低位平面 感兴趣区域被放置在与其他变换系数的最低位平面相同的位平面处，并且执行逆小波变换以重建数字图像数据。

    Image compression
    5.
    发明公开
    Image compression 失效
    Bildkomprimierung

    公开(公告)号：EP1862940A1

    公开(公告)日：2007-12-05

    申请号：EP07075798.4

    申请日：1998-03-20

    申请人： Mitsubishi Electric Corporation ,  University of Maryland, College Park

    发明人： Atsumi, Eiji ,  Farvardin, Nariman

    IPC分类号： G06K9/36 ,  H04N7/26

    CPC分类号： H04N19/17 ,  H04N19/63

    摘要： In a method of image compression a region of interest of the image represented by digital image data is selected. Bits of transform coefficients corresponding to the digital image data of the selected image are then shifted by a variable amount. The output comprises said digital image data corresponding to said shifted bits of transform coefficients being output earlier than the digital image data corresponding to areas outside of the region of interest.

    摘要翻译： 在图像压缩的方法中，选择由数字图像数据表示的图像的感兴趣区域。 然后将与所选图像的数字图像数据相对应的变换系数的位移动可变量。 所述输出包括对应于所述变换系数的所述移位比特的所述数字图像数据比对应于所述感兴趣区域之外的区域的数字图像数据更早地输出。

    Method and apparatus for processing image data
    6.
    发明公开
    Method and apparatus for processing image data 有权
    Verfahren und Vorrichtung zur Verarbeitung von Bilddaten相关者Bereiche

    公开(公告)号：EP2270718A1

    公开(公告)日：2011-01-05

    申请号：EP10179284.4

    申请日：1998-09-15

    申请人： University of Maryland, College Park ,  Mitsubishi Electric Corporation

    发明人： Atsumi, Eiji ,  Farvardin, Nariman

    IPC分类号： G06K9/36 ,  H04N7/26

    CPC分类号： H04N19/649 ,  H04N19/115 ,  H04N19/127 ,  H04N19/129 ,  H04N19/146 ,  H04N19/147 ,  H04N19/162 ,  H04N19/167 ,  H04N19/17 ,  H04N19/30 ,  H04N19/36 ,  H04N19/61 ,  H04N19/63 ,  H04N19/645 ,  H04N19/647 ,  H04N19/70

    摘要： In compressing digital image data a wavelet transform of all the pixel values in the digital image data is performed to obtain transform coefficients composed of bit planes. The transform coefficients corresponding to each region of interest are scaled up to place the transform coefficients in higher bit significance level planes than bit significance level planes of the other transform coefficients, wherein the scaling up is performed based on a maximum bit shift value if a priority assigned to the region of interest indicates the maximum bit shift value. The transform coefficients are then entropy encoded to form a bit stream, wherein the transform coefficients in the higher bit significance level planes are encoded at earlier stages of the encoding process than transform coefficients in lower bit significance level planes. A corresponding process of decoding is also disclosed.

    摘要翻译： 在压缩数字图像数据时，执行数字图像数据中的所有像素值的小波变换，以获得由位平面组成的变换系数。 对应于每个感兴趣区域的变换系数被放大以将变换系数置于比其他变换系数的位有效级别平面更高的比特有效级别的平面中，其中如果优先级，则基于最大位移位值执行放大 分配给感兴趣区域表示最大位移位值。 然后对变换系数进行熵编码以形成比特流，其中较高比特有效级别平面中的变换系数在编码处理的较早阶段被编码，而不是低位显着性级平面中的变换系数。 还公开了相应的解码过程。

    Method and apparatus for image decoding
    7.
    发明公开
    Method and apparatus for image decoding 有权
    Verfahren und Vorrichtung zur Dekodierung von Bildern

    公开(公告)号：EP2270716A1

    公开(公告)日：2011-01-05

    申请号：EP10179243.0

    申请日：1998-09-15

    申请人： University of Maryland, College Park ,  Mitsubishi Electric Corporation

    发明人： Atsumi, Eiji ,  Farvardin, Nariman

    IPC分类号： G06K9/36 ,  H04N7/26

    CPC分类号： H04N19/649 ,  H04N19/115 ,  H04N19/127 ,  H04N19/129 ,  H04N19/146 ,  H04N19/147 ,  H04N19/162 ,  H04N19/167 ,  H04N19/17 ,  H04N19/30 ,  H04N19/36 ,  H04N19/61 ,  H04N19/63 ,  H04N19/645 ,  H04N19/647 ,  H04N19/70

    摘要： In image decoding a region of interest coordinate information and a bit shift value are obtained from a header in a bit stream, said bit shift value being assigned to each region of interest. The coded digital image data is coded starting from a bit field of a higher bit significance level and continuing down to the bit field of a lower bit significance level to obtain transform coefficients. The transform coefficients corresponding to each region of interest are scaled down, wherein the scaling down is performed by shifting bits of said transform coefficients by said bit shift value specified by a priority assigned to said region of interest to place the transform coefficients in lower bit significance level planes, wherein the lowest bit plane of the region of interest is placed at the same bit plane as the lowest bit plane of the other transform coefficients. An inverse wavelet transform is then performed on said transform coefficients.

    摘要翻译： 在图像解码中，从比特流中的头部获得感兴趣区域坐标信息和比特移位值，所述比特移位值被分配给每个感兴趣区域。 编码数字图像数据从较高位有效等级的比特字段开始编码，并继续下降到较低位有效级别的比特字段，以获得变换系数。 对应于每个感兴趣区域的变换系数按比例缩小，其中通过将分配给所述感兴趣区域的优先级指定的所述位移值移位所述变换系数的位来执行缩小，以将变换系数置于较低位的有效位置 其中感兴趣区域的最低位平面被放置在与其它变换系数的最低位平面相同的位平面处。 然后对所述变换系数执行逆小波变换。