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81. 发明授权

US08170274B2 Method and apparatus for hiding data for halftone images 有权
标题翻译：用于隐藏半色调图像数据的方法和装置
公开(公告)号：US08170274B2
公开(公告)日：2012-05-01
申请号：US12889220
申请日：2010-09-23
申请人： Oscar Chi-Lim Au , Ming Sun Fu
发明人： Oscar Chi-Lim Au , Ming Sun Fu
IPC分类号： G06K9/00
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0081 , G06T2201/0083 , H04N1/32203 , H04N1/32245 , H04N1/32256 , H04N1/4052 , H04N2201/3233 , H04N2201/327
摘要： We propose methods for generating a halftone image, in which each pixel takes one of two tone values. The generated image contains hidden data, which is present at data storage pixels chosen using a pseudo-random number generator. In a first case, the data is hidden within an existing halftone image by reversing the tone value at certain of the data storage pixels, and at pixels neighbouring the data storage pixels. In a second case, the halftone image is generated from a grey-scale image, and data is hidden during this conversion process.
摘要翻译：我们提出了生成半色调图像的方法，其中每个像素采用两个色调值之一。生成的图像包含存在于使用伪随机数生成器选择的数据存储像素处的隐藏数据。在第一种情况下，通过反转某些数据存储像素处的色调值和与数据存储像素相邻的像素，将数据隐藏在现有的半色调图像内。在第二种情况下，从灰度图像生成半色调图像，并且在该转换处理期间数据被隐藏。

82. 发明授权

US07970224B2 Efficient rate allocation for multi-resolution coding of data 有权
标题翻译：数据的多分辨率编码的有效率分配
公开(公告)号：US07970224B2
公开(公告)日：2011-06-28
申请号：US12638225
申请日：2009-12-15
申请人： Yick Ming Yeung , Oscar Chi-Lim Au
发明人： Yick Ming Yeung , Oscar Chi-Lim Au
IPC分类号： G06K9/36 , G06K9/46
CPC分类号： H04N19/1883 , H04N19/115 , H04N19/129 , H04N19/132 , H04N19/146 , H04N19/147 , H04N19/184 , H04N19/19 , H04N19/63 , H04N19/647
摘要： A method and an apparatus relates to examining respective collections of coefficients out of a plurality of collections of coefficients according to a global coding order of the plurality of collections of coefficients, the respective collections of coefficients having respective priority levels as well as respective pluralities of coding units and truncation points which correspond to the coding units. In response to determining that an examined collection of coefficients out of the plurality of collections of coefficients has a priority level equal to a global priority level, encoding a first un-encoded coding unit according to a local coding order of the collection of coefficients and reducing the priority level of the collection of coefficients; and after each of the collections of coefficients in the plurality are examined, decreasing the global priority level. Repeating the examining, the encoding, the reducing and the decreasing for the plurality of collections of coefficients, and terminating the examining, the encoding, the reducing, and the decreasing in response to determining that a total amount of bits used is greater than a target bit rate.
摘要翻译：一种方法和装置涉及根据多个系数集合的全局编码顺序来检查多个系数集合中的系数的相应集合，各个系数集合具有各自的优先级以及相应的多个编码对应于编码单位的单位和截断点。响应于确定所检查的多个系数集合中的系数集合具有等于全局优先级的优先级，根据系数集合的本地编码顺序对第一未编码编码单元进行编码，并减少系数收集的优先级; 并且在检查了多个系数的每个集合之后，减小了全局优先级。重复对多个系数集合的检查，编码，减少和减少，并且终止检查，编码，减少和减少以响应于确定使用的总位数大于目标比特率。

83. 发明申请

US20100215106A1 EFFICIENT MULTI-FRAME MOTION ESTIMATION FOR VIDEO COMPRESSION 审中-公开
标题翻译：用于视频压缩的有效的多帧运动估计
公开(公告)号：US20100215106A1
公开(公告)日：2010-08-26
申请号：US12775312
申请日：2010-05-06
申请人： Oscar Chi-Lim Au , Andy Chang
发明人： Oscar Chi-Lim Au , Andy Chang
IPC分类号： H04N7/12 , G06K9/54
CPC分类号： H04N19/573
摘要： There is disclosed a method of digital signal compression, coding and representation, and more particularly a method of video compression, coding and representation system that uses multi-frame motion estimation and includes both device and method aspects. The invention also provides a computer program product, such as a recording medium, carrying program instructions readable by a computing device to cause the computing device to carry out a method according to the invention.
摘要翻译：公开了一种数字信号压缩，编码和表示的方法，特别是使用多帧运动估计的视频压缩，编码和表示系统的方法，包括设备和方法两个方面。本发明还提供了诸如记录介质的计算机程序产品，其携带由计算设备可读的程序指令，以使计算设备执行根据本发明的方法。

84. 发明申请

US20100150463A1 EFFICIENT RATE ALLOCATION FOR MULTI-RESOLUTION CODING OF DATA 有权
标题翻译：数据的多分辨率编码的有效率分配
公开(公告)号：US20100150463A1
公开(公告)日：2010-06-17
申请号：US12638225
申请日：2009-12-15
申请人： Yick Ming Yeung , Oscar Chi-Lim Au
发明人： Yick Ming Yeung , Oscar Chi-Lim Au
IPC分类号： G06K9/36
CPC分类号： H04N19/1883 , H04N19/115 , H04N19/129 , H04N19/132 , H04N19/146 , H04N19/147 , H04N19/184 , H04N19/19 , H04N19/63 , H04N19/647
摘要： There are disclosed three fast rate control methods that can efficiently reduce or remove the computation and memory usage redundancy over conventional PCRD methods. The first method, called successive bit-plane rate allocation (SBRA), assigns the maximum allowable bit-rate for each bit-plane of each code-block by using the currently available rate-distortion information only. The second method is called priority scanning rate allocation (PSRA). This first predicts the order of magnitude of each truncation point's rate-distortion slope and then encodes the truncation points based on the order (priority) information. The third method uses PSRA to obtain a significantly smaller amount of data than PCRD for optimal truncation and is called priority scanning with optimal truncation (PSOT). SBRA provides the highest computational complexity and memory usage reduction, and the lowest coding/transmission delay. The computational complexity reduction can be up to about 90% of the entropy coding process. However this method gives the lowest PSNR performance of the three. PSRA provides higher PSNR performance than SBRA with the penalty of lower memory usage reduction and higher delay. PSOT provides the best (optimal) quality while it is the least efficient method in term of computational complexity, memory usage and the coding/transmission delay. The three methods provide different degree of computation complexity and memory reduction, coding/transmission delay and PSNR performance. The most suitable rate control method can be chosen based on application requirements.
摘要翻译：已经公开了三种快速速率控制方法，其可以有效地减少或消除常规PCRD方法的计算和存储器使用冗余。称为连续位平面速率分配（SBRA）的第一种方法仅通过使用当前可用的速率失真信息为每个码块的每个位平面分配最大允许比特率。第二种方法称为优先扫描速率分配（PSRA）。这首先预测每个截断点的速率 - 失真斜率的数量级，然后根据顺序（优先级）信息对截断点进行编码。第三种方法使用PSRA获得比PCRD更少的数据量以获得最佳截断，并称为具有最佳截断（PSOT）的优先扫描。 SBRA提供了最高的计算复杂度和内存使用减少，以及最低的编码/传输延迟。计算复杂度降低可高达熵编码过程的大约90％。然而，这种方法给出了三种最低的PSNR性能。 PSRA提供比SBRA更高的PSNR性能，同时降低内存使用量的降低和更高的延迟。 PSOT提供最佳（最优）的质量，而在计算复杂度，内存使用和编码/传输延迟方面，PSOT是最不有效的方法。这三种方法提供了不同程度的计算复杂度和内存缩减，编码/传输延迟和PSNR性能。最合适的速率控制方法可以根据应用需求进行选择。

85. 发明授权

US07697715B2 Methods and apparatus for hiding data in halftone images 失效
标题翻译：在半色调图像中隐藏数据的方法和装置
公开(公告)号：US07697715B2
公开(公告)日：2010-04-13
申请号：US11233732
申请日：2005-09-22
申请人： Oscar Chi-Lim Au , Ming Sun Fu
发明人： Oscar Chi-Lim Au , Ming Sun Fu
IPC分类号： G06K9/00
CPC分类号： G06T1/0028 , G06T2201/0051 , G06T2201/0081 , G06T2201/0083 , H04N1/32203 , H04N1/32245 , H04N1/32256 , H04N1/4052 , H04N2201/3233 , H04N2201/327
摘要： We propose methods for generating a halftone image, in which each pixel takes one of two tone values. The generated image contains hidden data, which is present at data storage pixels chosen using a pseudo-random number generator. In a first case, the data is hidden within an existing halftone image by reversing the tone value at certain of the data storage pixels, and at pixels neighbouring the data storage pixels. In a second case, the halftone image is generated from a grey-scale image, and data is hidden during this conversion process.
摘要翻译：我们提出了生成半色调图像的方法，其中每个像素采用两个色调值之一。生成的图像包含存在于使用伪随机数生成器选择的数据存储像素处的隐藏数据。在第一种情况下，通过反转某些数据存储像素处的色调值和与数据存储像素相邻的像素，将数据隐藏在现有的半色调图像内。在第二种情况下，从灰度图像生成半色调图像，并且在该转换处理期间数据被隐藏。

86. 发明授权

US08442113B2 Effective rate control for video encoding and transcoding 有权
标题翻译：视频编码和代码转换的有效速率控制
公开(公告)号：US08442113B2
公开(公告)日：2013-05-14
申请号：US11553877
申请日：2006-10-27
申请人： Oscar Chi-Lim Au , Chi Wang Ho
发明人： Oscar Chi-Lim Au , Chi Wang Ho
IPC分类号： H04N7/12
CPC分类号： H04N19/40 , H04N19/115 , H04N19/124 , H04N19/147 , H04N19/176
摘要： The quantization factor for each block of pixels in an image or video encoding or transcoding method is determined. The blocks of pixels are classified according to predefined criteria and the blocks are processed according to the resulting classification. The predefined criteria include, for example, anticipated characteristics of the blocks after quantization, such as the transform coefficients after quantization and/or the total number of non-zero transform coefficients.
摘要翻译：确定图像或视频编码或代码转换方法中的每个像素块的量化因子。根据预定义的标准对像素块进行分类，并根据所得到的分类对块进行处理。预定义的标准包括例如量化后的块的预期特性，例如量化之后的变换系数和/或非零变换系数的总数。

87. 发明授权

US08326050B2 Method and apparatus for subpixel-based down-sampling 有权
标题翻译：用于基于子像素的下采样的方法和装置
公开(公告)号：US08326050B2
公开(公告)日：2012-12-04
申请号：US12326593
申请日：2008-12-02
申请人： Oscar Chi-Lim Au , Lu Fang , Hon Wah Wong , Yi Yang , Yan Huo
发明人： Oscar Chi-Lim Au , Lu Fang , Hon Wah Wong , Yi Yang , Yan Huo
IPC分类号： G06K9/36
CPC分类号： G06T3/403
摘要： This invention relates to method and apparatus for subpixel-based down-sampling. This invention implements an adaptive filter 140 based on edge detection, which removes visible color fringing artifacts while efficiently retaining sharpness.
摘要翻译：本发明涉及基于子像素的下采样的方法和装置。本发明实现了一种基于边缘检测的自适应滤波器140，其在有效地保持锐度的同时去除可见的彩色边缘伪像。

88. 发明申请

US20060002474A1 Efficient multi-block motion estimation for video compression 审中-公开
标题翻译：用于视频压缩的高效多块运动估计
公开(公告)号：US20060002474A1
公开(公告)日：2006-01-05
申请号：US11168232
申请日：2005-06-27
申请人： Oscar Chi-Lim Au , Andy Chang
发明人： Oscar Chi-Lim Au , Andy Chang
IPC分类号： H04B1/66 , H04N11/02 , H04N11/04 , H04N7/12
CPC分类号： H04N19/56 , H04N19/57
摘要： A novel method, system, and apparatus for efficient multi-block motion estimation in a digital signal compression and coding scheme. This invention selects only a few representative block sizes for motion estimation when certain favourable conditions occur, rather than using all available block sizes. This invention produces significantly reduced computational costs with virtually no sacrifice in visual quality and in bit-rate.
摘要翻译：一种用于数字信号压缩和编码方案中的高效多块运动估计的新颖方法，系统和装置。本发明在某些有利条件发生时仅选择几个表示块大小用于运动估计，而不是使用所有可用的块大小。本发明大大降低了计算成本，几乎没有牺牲视觉质量和比特率。

89. 发明授权

US06842483B1 Device, method and digital video encoder for block-matching motion estimation 失效
标题翻译：用于块匹配运动估计的装置，方法和数字视频编码器
公开(公告)号：US06842483B1
公开(公告)日：2005-01-11
申请号：US09659597
申请日：2000-09-11
申请人： Oscar Chi-Lim Au , Ming Lei Liou , Alexandros Tourapis , Guobin Shen
发明人： Oscar Chi-Lim Au , Ming Lei Liou , Alexandros Tourapis , Guobin Shen
IPC分类号： H04N7/12 , H04N7/26
CPC分类号： H04N19/57 , H04N19/533 , H04N19/557
摘要： A device or method for video compression uses a technique in which changes in the image are encoded by motions of block of the image and signals indicating evolutions in the block. To determine the motions of the blocks of a each frame, a search is performed for a similar block of a previous frame based on points of the previous frame which are arranged in successive diamond shaped zones. The diamond shaped zones may be centred on the position of the block in previous frame, or one or more predicted motions of the block. The method terminates according to criteria defined using thresholds.
摘要翻译：用于视频压缩的设备或方法使用这样一种技术，其中通过图像块的运动和指示块中的演化的信号对图像的改变进行编码。为了确定每帧的块的运动，基于布置在连续菱形区域中的先前帧的点，针对先前帧的相似块执行搜索。菱形区域可以在前一帧中的块的位置上居中，或者块的一个或多个预测的运动。该方法根据使用阈值定义的标准终止。

90. 发明授权

US06690811B2 Methods and apparatus for hiding data in halftone images 有权
标题翻译：在半色调图像中隐藏数据的方法和装置
公开(公告)号：US06690811B2
公开(公告)日：2004-02-10
申请号：US09732022
申请日：2000-12-08
申请人： Oscar Chi-Lim Au , Ming Sun Fu
发明人： Oscar Chi-Lim Au , Ming Sun Fu
IPC分类号： G06K900
CPC分类号： G06T1/005 , G06T2201/0051 , G06T2201/0065
摘要： We propose modifying the error-diffusion method for transforming a grey-scale image into a halftone image, so that binary data is hidden in the resulting halftone image. Simultaneously, a second halftone image is generated by error diffusion, not storing the hidden data. The hidden binary data is typically a binary image, and the dark regions of this binary image can be seen when the two halftone images are overlaid.
摘要翻译：我们建议修改用于将灰度图像转换成半色调图像的误差扩散方法，从而在生成的半色调图像中隐藏二进制数据。同时，通过误差扩散产生第二个半色调图像，而不是存储隐藏的数据。隐藏的二进制数据通常是二进制图像，并且当两个半色调图像被重叠时，可以看到该二进制图像的暗区域。

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