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1. 发明授权

US08582910B2 Methods and apparatus for editing images 失效
标题翻译：用于编辑图像的方法和装置
公开(公告)号：US08582910B2
公开(公告)日：2013-11-12
申请号：US12896546
申请日：2010-10-01
申请人： Wei Zhang , Wai Kuen Cham
发明人： Wei Zhang , Wai Kuen Cham
IPC分类号： G06K9/40
CPC分类号： G06T5/003 , G06T5/50 , G06T2200/21 , G06T2207/10016 , G06T2207/20221
摘要： Methods and apparatus for editing an image having focused and defocused objects are provided in the present application. According to an embodiment, the method comprises: determining blurriness of edge pixels in the image; propagating the determined blurriness to non-edge pixels adjacent to each of the edge pixels so as to determine blurriness of the non-edge pixels; estimating a focus map based on the blurriness of the edge pixels and the non-edge pixels to identify the defocused objects and the focused objects; and refocusing the defocused objects based on the focus map or defocusing at least one of the defocused objects and the focused objects.
摘要翻译：在本申请中提供了用于编辑具有聚焦和散焦对象的图像的方法和装置。根据实施例，该方法包括：确定图像中的边缘像素的模糊度; 将确定的模糊度传播到与每个边缘像素相邻的非边缘像素，以便确定非边缘像素的模糊度; 基于边缘像素和非边缘像素的模糊度来估计焦点图，以识别散焦对象和聚焦对象; 并且基于焦点图重新聚焦散焦对象，或者使至少一个散焦对象和聚焦对象散焦。

2. 发明申请

US20110085741A1 METHODS AND APPARATUS FOR EDITING IMAGES 失效
标题翻译：用于编辑图像的方法和装置
公开(公告)号：US20110085741A1
公开(公告)日：2011-04-14
申请号：US12896546
申请日：2010-10-01
申请人： Wei Zhang , Wai Kuen Cham
发明人： Wei Zhang , Wai Kuen Cham
IPC分类号： G06K9/40
CPC分类号： G06T5/003 , G06T5/50 , G06T2200/21 , G06T2207/10016 , G06T2207/20221
摘要： Methods and apparatus for editing an image having focused and defocused objects are provided in the present application. According to an embodiment, the method comprises: determining blurriness of edge pixels in the image; propagating the determined blurriness to non-edge pixels adjacent to each of the edge pixels so as to determine blurriness of the non-edge pixels; estimating a focus map based on the blurriness of the edge pixels and the non-edge pixels to identify the defocused objects and the focused objects; and refocusing the defocused objects based on the focus map or defocusing at least one of the defocused objects and the focused objects.
摘要翻译：在本申请中提供了用于编辑具有聚焦和散焦对象的图像的方法和装置。根据实施例，该方法包括：确定图像中的边缘像素的模糊度; 将确定的模糊度传播到与每个边缘像素相邻的非边缘像素，以便确定非边缘像素的模糊度; 基于边缘像素和非边缘像素的模糊度来估计焦点图，以识别散焦对象和聚焦对象; 并且基于焦点图重新聚焦散焦对象，或者使至少一个散焦对象和聚焦对象散焦。

3. 发明授权

US08630356B2 High performance loop filters in video compression 有权
标题翻译：视频压缩中的高性能环路滤波器
公开(公告)号：US08630356B2
公开(公告)日：2014-01-14
申请号：US12984464
申请日：2011-01-04
申请人： Renqi Zhang , Wai Kuen Cham
发明人： Renqi Zhang , Wai Kuen Cham
IPC分类号： H04N7/12
CPC分类号： H04N19/82 , H04N19/117 , H04N19/147 , H04N19/176 , H04N19/46 , H04N19/619 , H04N19/96
摘要： Disclosed are a filter and a method to improve the objective and subjective video coding performance The filter comprises: a parameter estimation unit configured to determine means and variances from a pilot frame; a filter unit configured to receive quantized residual coefficients in video coding process and restore coefficients from the quantized residual coefficients and the determined means and variances; an inverse ICT unit configured to apply an inverse ICT to the restored coefficients to obtain a filtered frame; a rate-distortion optimization unit configured to determine a quadtree block partition index; and an adaptive block selection unit configured to select final blocks according to quadtree block partition index, the final blocks being utilized to form the filtered frame.
摘要翻译：公开了一种改善目标和主观视频编码性能的滤波器和方法。滤波器包括：参数估计单元，被配置为确定来自导频帧的装置和方差; 滤波器单元，被配置为在视频编码处理中接收量化残差系数，并从量化残差系数和所确定的均值和方差中恢复系数; 反向ICT单元，被配置为对恢复的系数应用反向ICT以获得滤波的帧; 速率失真优化单元，被配置为确定四叉树块分区索引; 以及自适应块选择单元，被配置为根据四叉树块分区索引来选择最终块，所述最终块用于形成所述滤波帧。

4. 发明授权

US08102918B2 Generation of an order-2N transform from an order-N transform 失效
标题翻译：从N阶变换生成2N阶变换
公开(公告)号：US08102918B2
公开(公告)日：2012-01-24
申请号：US12103678
申请日：2008-04-15
申请人： Wai Kuen Cham
发明人： Wai Kuen Cham
IPC分类号： H04N7/12
CPC分类号： G06F17/147 , H04N19/60
摘要： Apparatus, systems and techniques based on an integer transform for encoding and decoding video or image signals, including transform of encoding and decoding of image and video signals and generation of an order-2N transform W from an order-N transform T in the field of image and video coding. For example, a retrieving unit is configured to retrieve an order-N transform T, where N is an integer; a deriving unit is configured to derive an order-2N transform W from the retrieved order-N transform T, and a transforming unit configured to generate an order-2N data Z using the derived transform W.
摘要翻译：基于用于对视频或图像信号进行编码和解码的整数变换的装置，系统和技术，包括图像和视频信号的编码和解码的变换，以及从N阶变换T中的阶N变换T生成图像和视频编码。例如，检索单元被配置为检索N阶变换T，其中N是整数; 导出单元被配置为从所检索的顺序-N变换T中导出次2N变换W，以及变换单元，被配置为使用导出的变换W生成次2N数据Z。

5. 发明申请

US20120069908A1 Generation of an Order-2N Transform from an Order-N Transform 失效
标题翻译：从N阶变换生成2N阶变换
公开(公告)号：US20120069908A1
公开(公告)日：2012-03-22
申请号：US13308129
申请日：2011-11-30
申请人： Wai Kuen Cham
发明人： Wai Kuen Cham
IPC分类号： H04N7/30
CPC分类号： G06F17/147 , H04N19/60
摘要： Apparatus, systems and techniques based on an integer transform for encoding and decoding video or image signals, including transform of encoding and decoding of image and video signals and generation of an order-2N transform W from an order-N transform T in the field of image and video coding. For example, a retrieving unit is configured to retrieve an order-N transform T, where N is an integer; a deriving unit is configured to derive an order-2N transform W from the retrieved order-N transform T, and a transforming unit configured to generate an order-2N data Z using the derived transform W.
摘要翻译：基于用于对视频或图像信号进行编码和解码的整数变换的装置，系统和技术，包括图像和视频信号的编码和解码的变换，以及从N阶变换T中的阶N变换T生成图像和视频编码。例如，检索单元被配置为检索N阶变换T，其中N是整数; 导出单元被配置为从所检索的顺序-N变换T中导出次2N变换W，以及变换单元，被配置为使用导出的变换W生成次2N数据Z。

6. 发明授权

US08483281B2 Generation of an order-2N transform from an order-N transform 失效
标题翻译：从N阶变换生成2N阶变换
公开(公告)号：US08483281B2
公开(公告)日：2013-07-09
申请号：US13308129
申请日：2011-11-30
申请人： Wai Kuen Cham
发明人： Wai Kuen Cham
IPC分类号： H04N7/12
CPC分类号： G06F17/147 , H04N19/60
摘要： Apparatus, systems and techniques based on an integer transform for encoding and decoding video or image signals, including transform of encoding and decoding of image and video signals and generation of an order-2N transform W from an order-N transform T in the field of image and video coding. For example, a retrieving unit is configured to retrieve an order-N transform T, where N is an integer; a deriving unit is configured to derive an order-2N transform W from the retrieved order-N transform T, and a transforming unit configured to generate an order-2N data Z using the derived transform W.
摘要翻译：基于用于对视频或图像信号进行编码和解码的整数变换的装置，系统和技术，包括图像和视频信号的编码和解码的变换，以及从N阶变换T中的阶N变换T生成图像和视频编码。例如，检索单元被配置为检索N阶变换T，其中N是整数; 导出单元被配置为从所检索的顺序-N变换T中导出次2N变换W，以及变换单元，被配置为使用导出的变换W生成次2N数据Z。

7. 发明授权

US08451896B2 Method and apparatus for adaptive quantization in digital video coding 有权
标题翻译：数字视频编码中自适应量化的方法和装置
公开(公告)号：US08451896B2
公开(公告)日：2013-05-28
申请号：US12581316
申请日：2009-10-19
申请人： Chi Keung Fong , Wai Kuen Cham , Ka Man Cheng , Yu Liu
发明人： Chi Keung Fong , Wai Kuen Cham , Ka Man Cheng , Yu Liu
IPC分类号： H04N7/12 , H04N7/50
CPC分类号： H04N7/50 , H04N19/126 , H04N19/159 , H04N19/172 , H04N19/196 , H04N19/61
摘要： The invention relates to adjusting the quantization parameter in digital video coding. A shift value (QP Shift) is used to adjust the quantization parameter. The shift value is determined in a determining step 101. The video nature is determined and compared with a threshold in a comparing step 102 to adjust the shift value adaptively according to the frame type in an adjusting step 103. The shift value shifts the quantization parameter in a shifting step 104.
摘要翻译：本发明涉及在数字视频编码中调整量化参数。移位值（QP Shift）用于调整量化参数。在确定步骤101中确定移位值。在比较步骤102中确定视频特性并将其与阈值进行比较，以在调整步骤103中根据帧类型自适应地调整移位值。移位值将量化参数在移动步骤104中。

8. 发明申请

US20090257505A1 Generation of an Order-2N Transform from an Order-N Transform 失效
标题翻译：从N阶变换生成2N阶变换
公开(公告)号：US20090257505A1
公开(公告)日：2009-10-15
申请号：US12103678
申请日：2008-04-15
申请人： Wai Kuen Cham
发明人： Wai Kuen Cham
IPC分类号： H04N7/30 , G06F17/14
CPC分类号： G06F17/147 , H04N19/60
摘要： Apparatus, systems and techniques based on an integer transform for encoding and decoding video or image signals, including transform of encoding and decoding of image and video signals and generation of an order-2N transform W from an order-N transform T in the field of image and video coding. For example, a retrieving unit is configured to retrieve an order-N transform T, where N is an integer; a deriving unit is configured to derive an order-2N transform W from the retrieved order-N transform T, and a transforming unit configured to generate an order-2N data Z using the derived transform W.
摘要翻译：基于用于对视频或图像信号进行编码和解码的整数变换的装置，系统和技术，包括图像和视频信号的编码和解码的变换，以及从N阶变换T中的阶N变换T生成图像和视频编码。例如，检索单元被配置为检索N阶变换T，其中N是整数; 导出单元被配置为从所检索的顺序-N变换T中导出次2N变换W，以及变换单元，被配置为使用导出的变换W生成次2N数据Z。

9. 发明授权

US08255445B2 Processes and apparatus for deriving order-16 integer transforms 失效
标题翻译：导出16阶整数变换的过程和设备
公开(公告)号：US08255445B2
公开(公告)日：2012-08-28
申请号：US12100358
申请日：2008-04-09
申请人： Wai Kuen Cham , Chi Keung Fong
发明人： Wai Kuen Cham , Chi Keung Fong
IPC分类号： G06F17/14
CPC分类号： G06F17/147
摘要： Apparatus, systems and techniques based on an integer transform for encoding and decoding video or image signals, including apparatus, systems and techniques for deriving an order-16 integer transform from an order-8 integer transform in image and video coding. In some implementations, eight additions and eight subtractions are used to assign the data elements to be transformed to an intermediate matrix; and then two fast algorithms for the computation of the order-8 transform may be applied to the first 8 vectors of the intermediate matrix, and the last 8 vectors of the intermediate matrix, respectively. The derived order-16 integer transform tends to produce small magnitude and high frequency transformed coefficients, and thus achieve high compressibility.
摘要翻译：基于用于编码和解码视频或图像信号的整数变换的装置，系统和技术，包括用于从图像和视频编码中的8阶整数变换得到16阶整数变换的装置，系统和技术。在一些实现中，使用八个加法和八个减法来将要变换的数据元素分配给中间矩阵; 然后可以将用于计算8阶变换的两个快速算法应用于中间矩阵的前8个向量，以及中间矩阵的最后8个向量。衍生的顺序16整数变换倾向于产生小幅度和高频变换系数，从而实现高压缩性。

10. 发明申请

US20120170668A1 HIGH PERFORMANCE LOOP FILTERS IN VIDEO COMPRESSION 有权
标题翻译：高性能环路滤波器在视频压缩
公开(公告)号：US20120170668A1
公开(公告)日：2012-07-05
申请号：US12984464
申请日：2011-01-04
申请人： Renqi Zhang , Wai Kuen Cham
发明人： Renqi Zhang , Wai Kuen Cham
IPC分类号： H04N7/26
CPC分类号： H04N19/82 , H04N19/117 , H04N19/147 , H04N19/176 , H04N19/46 , H04N19/619 , H04N19/96
摘要： Disclosed are a filter and a method to improve the objective and subjective video coding performance The filter comprises: a parameter estimation unit configured to determine means and variances from a pilot frame; a filter unit configured to receive quantized residual coefficients in video coding process and restore coefficients from the quantized residual coefficients and the determined means and variances; an inverse ICT unit configured to apply an inverse ICT to the restored coefficients to obtain a filtered frame; a rate-distortion optimization unit configured to determine a quadtree block partition index; and an adaptive block selection unit configured to select final blocks according to quadtree block partition index, the final blocks being utilized to form the filtered frame.
摘要翻译：公开了一种改善目标和主观视频编码性能的滤波器和方法。滤波器包括：参数估计单元，被配置为确定来自导频帧的装置和方差; 滤波器单元，被配置为在视频编码处理中接收量化残差系数，并从量化残差系数和所确定的均值和方差中恢复系数; 反向ICT单元，被配置为对恢复的系数应用反向ICT以获得滤波的帧; 速率失真优化单元，被配置为确定四叉树块分区索引; 以及自适应块选择单元，被配置为根据四叉树块分区索引来选择最终块，所述最终块用于形成所述滤波帧。

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