公开(公告)号：US08233703B2

公开(公告)日：2012-07-31

申请号：US13167880

申请日：2011-06-24

申请人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

发明人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

IPC分类号： G06K9/62

CPC分类号： H04N19/625 ,  G06T3/4084 ,  H04N19/13 ,  H04N19/40 ,  H04N19/48 ,  H04N19/59 ,  H04N19/60

摘要： Down-sampling of an image may be performed in the DCT domain. A multiple layered network is used to select transform matrices for down-sampling a DCT image of size M×N to a DCT image of size I×J. A spatial domain down-sampling method is selected and applied to the DCT image to produce a down-sampled DCT reference image. A learning with forgetting algorithm is used to apply a decay to the elements of the transform matrix and select a transform matrices which solve an optimization problem. The optimization problem is a function of the visual quality of images obtained using the transform matrices and the computational complexity associated with using the transform matrices. The visual quality is a measure of the difference between the down-sampled DCT image obtained using the transform matrices and the visual quality of the DCT reference image obtained using a spatial domain down-sampling method.

摘要翻译： 可以在DCT域中执行图像的下采样。 使用多层网络来选择用于将尺寸为M×N的DCT图像下采样到DCT大小为I×J的DCT图像的变换矩阵。 选择空间域下采样方法并将其应用于DCT图像以产生下采样DCT参考图像。 使用遗忘算法的学习对变换矩阵的元素应用衰减，并选择解决优化问题的变换矩阵。 优化问题是使用变换矩阵获得的图像的视觉质量和与使用变换矩阵相关联的计算复杂度的函数。 视觉质量是使用变换矩阵获得的下采样DCT图像与使用空间域下采样方法获得的DCT参考图像的视觉质量之间的差的度量。

公开(公告)号：US20110249722A1

公开(公告)日：2011-10-13

申请号：US13167880

申请日：2011-06-24

申请人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

发明人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

IPC分类号： H04N11/02

CPC分类号： H04N19/625 ,  G06T3/4084 ,  H04N19/13 ,  H04N19/40 ,  H04N19/48 ,  H04N19/59 ,  H04N19/60

摘要： Down-sampling of an image may be performed in the DCT domain. A multiple layered network is used to select transform matrices for down-sampling a DCT image of size M×N to a DCT image of size I×J. A spatial domain down-sampling method is selected and applied to the DCT image to produce a down-sampled DCT reference image. A learning with forgetting algorithm is used to apply a decay to the elements of the transform matrix and select a transform matrices which solve an optimization problem. The optimization problem is a function of the visual quality of images obtained using the transform matrices and the computational complexity associated with using the transform matrices. The visual quality is a measure of the difference between the down-sampled DCT image obtained using the transform matrices and the visual quality of the DCT reference image obtained using a spatial domain down-sampling method.

摘要翻译： 可以在DCT域中执行图像的下采样。 使用多层网络来选择用于将尺寸为M×N的DCT图像下采样到DCT大小为I×J的DCT图像的变换矩阵。 选择空间域下采样方法并将其应用于DCT图像以产生下采样DCT参考图像。 使用遗忘算法的学习对变换矩阵的元素应用衰减，并选择解决优化问题的变换矩阵。 优化问题是使用变换矩阵获得的图像的视觉质量和与使用变换矩阵相关联的计算复杂度的函数。 视觉质量是使用变换矩阵获得的下采样DCT图像与使用空间域下采样方法获得的DCT参考图像的视觉质量之间的差的度量。

公开(公告)号：US20080298701A1

公开(公告)日：2008-12-04

申请号：US12133095

申请日：2008-06-04

申请人： XIANG YU ,  En-hui Yang ,  Haiquan Wang

发明人： XIANG YU ,  En-hui Yang ,  Haiquan Wang

IPC分类号： G06K9/36

CPC分类号： G06T3/4084 ,  H04N19/40 ,  H04N19/48 ,  H04N19/60

摘要： Down-sampling of an image may be performed in the DCT domain. Transform matrices are obtained for down-sampling a DCT image of size M×N to a down-sampled DCT image of size I×J. The transform matrices may be used to down-sample the DCT image directly in the DCT domain. A spatial domain down-sampling method is selected and applied to the DCT image to produce a down-sampled DCT reference image. The transform matrices are selected by solving an optimization problem, leading to transform matrices which achieve a desired trade-off between the visual quality of images obtained using the transform matrices and the computational complexity associated with using the transform matrices. The visual quality is a measure of the difference between the down-sampled DCT image obtained using the transform matrices and the visual quality of the DCT reference image obtained using a spatial domain down-sampling method.

摘要翻译： 可以在DCT域中执行图像的下采样。 获得变换矩阵，用于将尺寸为M×N的DCT图像下采样到尺寸为I×J的下采样DCT图像。 变换矩阵可以用于在DCT域中直接对DCT图像进行下采样。 选择空间域下采样方法并将其应用于DCT图像以产生下采样DCT参考图像。 通过求解优化问题来选择变换矩阵，导致变换矩阵，其在使用变换矩阵获得的图像的视觉质量和与使用变换矩阵相关联的计算复杂度之间实现期望的权衡。 视觉质量是使用变换矩阵获得的下采样DCT图像与使用空间域下采样方法获得的DCT参考图像的视觉质量之间的差的度量。

公开(公告)号：US08175169B2

公开(公告)日：2012-05-08

申请号：US12371127

申请日：2009-02-13

申请人： En-hui Yang ,  Haiquan Wang ,  Xiang Yu

发明人： En-hui Yang ,  Haiquan Wang ,  Xiang Yu

IPC分类号： H04B14/04

CPC分类号： H04L1/0014 ,  H03M7/3082 ,  H04L1/0042

摘要： Methods are described for configuring a quantizer to achieve improved end-to-end distortion performance when transmitting encoded source data over a noisy channel. The codebook and partitioning are selected using an iterative process of determining an updated codebook and an updated partition space, where the updated codebook is based, in part, on the average symbol error probability of the channel. Complete knowledge of the transitional probabilities of the channel is not required. Variants of the iterative process are described.

摘要翻译： 描述了用于配置量化器以在通过有噪声通道发送编码的源数据时实现改进的端到端失真性能的方法。 使用确定更新的码本和更新的分区空间的迭代过程来选择码本和划分，其中更新的码本部分地基于信道的平均符号错误概率。 不需要完全了解频道的过渡概率。 描述迭代过程的变体。

公开(公告)号：US20120093428A1

公开(公告)日：2012-04-19

申请号：US13311781

申请日：2011-12-06

申请人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

发明人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

IPC分类号： G06K9/36

CPC分类号： G06T3/4084

摘要： A method and device that uses transform matrices to down-sample a DCT image directly in the DCT domain. The transform matrices have been selected to minimize an optimization problem which is a function of the visual quality of down-sampled images obtained using the matrices and the computational complexity associated with using the transform matrices. The transform matrices comprise a row transform matrix and a column transform matrix. A down-sampled image is produced by determining an intermediary matrix as the product of the DCT image and one of either the row transform matrix or the column transform matrix and then determining the down-sampled image as the product of the intermediary matrix and the transform matrix not already used to determine the intermediary matrix.

摘要翻译： 一种使用变换矩阵直接在DCT域中对DCT图像进行下采样的方法和装置。 已经选择了变换矩阵以最小化优化问题，该优化问题是使用矩阵获得的下采样图像的视觉质量以及与使用变换矩阵相关联的计算复杂度的函数。 变换矩阵包括行变换矩阵和列变换矩阵。 通过将中间矩阵确定为DCT图像与行变换矩阵或列变换矩阵之一的乘积，然后将下采样图像确定为中间矩阵和变换的乘积来产生下采样图像 矩阵尚未用于确定中间矩阵。

公开(公告)号：US08903168B2

公开(公告)日：2014-12-02

申请号：US13532827

申请日：2012-06-26

申请人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

发明人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

IPC分类号： G06K9/62 ,  H04N19/59 ,  H04N19/48 ,  G06T3/40 ,  H04N19/40 ,  H04N19/60

CPC分类号： H04N19/625 ,  G06T3/4084 ,  H04N19/13 ,  H04N19/40 ,  H04N19/48 ,  H04N19/59 ,  H04N19/60

摘要： Down-sampling of an image may be performed in the DCT domain. A multiple layered network is used to select transform matrices for down-sampling a DCT image of size M×N to a DCT image of size I×J. A spatial domain down-sampling method is selected and applied to the DCT image to produce a down-sampled DCT reference image. A learning with forgetting algorithm is used to apply a decay to the elements of the transform matrix and select a transform matrices which solve an optimization problem. The optimization problem is a function of the visual quality of images obtained using the transform matrices and the computational complexity associated with using the transform matrices. The visual quality is a measure of the difference between the down-sampled DCT image obtained using the transform matrices and the visual quality of the DCT reference image obtained using a spatial domain down-sampling method.

摘要翻译： 可以在DCT域中执行图像的下采样。 使用多层网络来选择用于将尺寸为M×N的DCT图像下采样到DCT大小为I×J的DCT图像的变换矩阵。 选择空间域下采样方法并将其应用于DCT图像以产生下采样DCT参考图像。 使用遗忘算法的学习对变换矩阵的元素应用衰减，并选择解决优化问题的变换矩阵。 优化问题是使用变换矩阵获得的图像的视觉质量和与使用变换矩阵相关联的计算复杂度的函数。 视觉质量是使用变换矩阵获得的下采样DCT图像与使用空间域下采样方法获得的DCT参考图像的视觉质量之间的差的度量。

公开(公告)号：US07995850B2

公开(公告)日：2011-08-09

申请号：US12133083

申请日：2008-06-04

申请人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

发明人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

IPC分类号： G06K9/36

CPC分类号： H04N19/625 ,  G06T3/4084 ,  H04N19/13 ,  H04N19/40 ,  H04N19/48 ,  H04N19/59 ,  H04N19/60

摘要： Down-sampling of an image may be performed in the DCT domain. A multiple layered network is used to select transform matrices for down-sampling a DCT image of size M×N to a DCT image of size I×J. A spatial domain down-sampling method is selected and applied to the DCT image to produce a down-sampled DCT reference image. A learning with forgetting algorithm is used to apply a decay to the elements of the transform matrix and select a transform matrices which solve an optimization problem. The optimization problem is a function of the visual quality of images obtained using the transform matrices and the computational complexity associated with using the transform matrices. The visual quality is a measure of the difference between the down-sampled DCT image obtained using the transform matrices and the visual quality of the DCT reference image obtained using a spatial domain down-sampling method.

摘要翻译： 可以在DCT域中执行图像的下采样。 使用多层网络来选择用于将尺寸为M×N的DCT图像下采样到DCT大小为I×J的DCT图像的变换矩阵。 选择空间域下采样方法并将其应用于DCT图像以产生下采样DCT参考图像。 使用遗忘算法的学习对变换矩阵的元素应用衰减，并选择解决优化问题的变换矩阵。 优化问题是使用变换矩阵获得的图像的视觉质量和与使用变换矩阵相关联的计算复杂度的函数。 视觉质量是使用变换矩阵获得的下采样DCT图像与使用空间域下采样方法获得的DCT参考图像的视觉质量之间的差的度量。

公开(公告)号：US20080298699A1

公开(公告)日：2008-12-04

申请号：US12133071

申请日：2008-06-04

申请人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

发明人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

IPC分类号： G06K9/36 ,  G06K9/32 ,  G06F17/14

CPC分类号： G06T3/4084

摘要： A method and device that uses transform matrices to down-sample a DCT image directly in the DCT domain. The transform matrices have been selected to minimize an optimization problem which is a function of the visual quality of down-sampled images obtained using the matrices and the computational complexity associated with using the transform matrices. The transform matrices comprise a row transform matrix and a column transform matrix. A down-sampled image is produced by determining an intermediary matrix as the product of the DCT image and one of either the row transform matrix or the column transform matrix and then determining the down-sampled image as the product of the intermediary matrix and the transform matrix not already used to determine the intermediary matrix.

摘要翻译： 一种使用变换矩阵直接在DCT域中对DCT图像进行下采样的方法和装置。 已经选择了变换矩阵以最小化优化问题，该优化问题是使用矩阵获得的下采样图像的视觉质量以及与使用变换矩阵相关联的计算复杂度的函数。 变换矩阵包括行变换矩阵和列变换矩阵。 通过将中间矩阵确定为DCT图像与行变换矩阵或列变换矩阵之一的乘积，然后将下采样图像确定为中间矩阵和变换的乘积来产生下采样图像 矩阵尚未用于确定中间矩阵。

公开(公告)号：US08687905B2

公开(公告)日：2014-04-01

申请号：US13534051

申请日：2012-06-27

申请人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

发明人： Xiang Yu ,  En-hui Yang ,  Haiquan Wang

IPC分类号： G06K9/46

CPC分类号： G06T3/4084 ,  H04N19/40 ,  H04N19/48 ,  H04N19/60

摘要： Down-sampling of an image may be performed in the DCT domain. Transform matrices are obtained for down-sampling a DCT image of size M×N to a down-sampled DCT image of size I×J. The transform matrices may be used to down-sample the DCT image directly in the DCT domain. A spatial domain down-sampling method is selected and applied to the DCT image to produce a down-sampled DCT reference image. The transform matrices are selected by solving an optimization problem, leading to transform matrices which achieve a desired trade-off between the visual quality of images obtained using the transform matrices and the computational complexity associated with using the transform matrices. The visual quality is a measure of the difference between the down-sampled DCT image obtained using the transform matrices and the visual quality of the DCT reference image obtained using a spatial domain down-sampling method.

摘要翻译： 可以在DCT域中执行图像的下采样。 获得变换矩阵，以将尺寸为M×N的DCT图像下降为尺寸为I×J的下采样DCT图像。 变换矩阵可以用于在DCT域中直接对DCT图像进行下采样。 选择空间域下采样方法并将其应用于DCT图像以产生下采样DCT参考图像。 通过求解优化问题来选择变换矩阵，导致变换矩阵，其在使用变换矩阵获得的图像的视觉质量和与使用变换矩阵相关联的计算复杂度之间实现期望的权衡。 视觉质量是使用变换矩阵获得的下采样DCT图像与使用空间域下采样方法获得的DCT参考图像的视觉质量之间的差的度量。

公开(公告)号：US20120213298A1

公开(公告)日：2012-08-23

申请号：US13463967

申请日：2012-05-04

申请人： En-hui Yang ,  Haiquan Wang ,  Xiang Yu

发明人： En-hui Yang ,  Haiquan Wang ,  Xiang Yu

IPC分类号： H04B14/04

CPC分类号： H04L1/0014 ,  H03M7/3082 ,  H04L1/0042

摘要： Methods are described for configuring a quantizer to achieve improved end-to-end distortion performance when transmitting encoded source data over a noisy channel. The codebook and partitioning are selected using an iterative process of determining an updated codebook and an updated partition space, where the updated codebook is based, in part, on the average symbol error probability of the channel. Complete knowledge of the transitional probabilities of the channel is not required. Variants of the iterative process are described.

摘要翻译： 描述了用于配置量化器以在通过有噪声通道发送编码的源数据时实现改进的端到端失真性能的方法。 使用确定更新的码本和更新的分区空间的迭代过程来选择码本和划分，其中更新的码本部分地基于信道的平均符号错误概率。 不需要完全了解频道的过渡概率。 描述迭代过程的变体。