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11.发明授权Method of compensating the color tone differences between two images of the same scene 有权补偿相同场景的两幅图像之间的色调差异的方法公开(公告)号：US08199384B2
公开(公告)日：2012-06-12
申请号：US11811717
申请日：2007-06-11
IPC分类号： G03F3/08
CPC分类号： G06T5/40 , G06T5/009 , G06T2207/10016 , G06T2207/10024
摘要： The color tone compensation method provides a simple and efficient method to compensate the color tone differences between two different sources of images. A first image sample, such as a still image, from a first image capturing source and a second image sample, such as a video frame, from a second image capturing source are aligned, and a tone-mapping estimation routine is applied to the two aligned images. The tone-mapping estimation routine uses the pixel intensity value histograms associated with the two aligned images and generates a tone mapping table. The tone mapping table includes a conversion intensity value for each intensity value in the second image. The conversion intensity value is a statistical measure, such as the mean, calculated according to the data in the corresponding pixel intensity value histogram. The tone-mapping table is applied to any image generated by the second image capturing source, thereby generating a new image with similar color tone as the first image generated by the first image capturing source.
摘要翻译： 色调补偿方法提供了一种简单有效的方法来补偿两种不同图像源之间的色调差异。 将来自第一图像捕获源的第一图像样本（例如静止图像）和来自第二图像捕获源的诸如视频帧的第二图像样本对准，并且将色调映射估计例程应用于两个 对齐图像。 色调映射估计例程使用与两个对准图像相关联的像素强度值直方图，并生成色调映射表。 色调映射表包括第二图像中每个强度值的转换强度值。 转换强度值是统计度量，如平均值，根据相应像素强度值直方图中的数据计算。 色调映射表应用于由第二图像捕获源产生的任何图像，从而生成与由第一图像捕获源生成的第一图像相似的色调的新图像。
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12.发明授权Decoder-derived geometric transformations for motion compensated inter prediction 有权用于运动补偿帧间预测的解码器导出的几何变换公开(公告)号：US08792549B2
公开(公告)日：2014-07-29
申请号：US13037054
申请日：2011-02-28
CPC分类号： H04N19/395 , H04N19/103 , H04N19/176 , H04N19/44 , H04N19/46 , H04N19/51 , H04N19/513
摘要： A method of estimating motion by estimating motion parameters of a complex motion model using reconstructed neighboring pixels of the current block and then applying the estimated motion parameters to the coordinates of the current block to determine motion compensated in a corresponding reference block. The parameters are not transmitted to a decoder and are derived at the decoder side. The encoder only sends a 1-bit control-flag to indicate whether the derived parameters should be used.
摘要翻译： 通过使用当前块的重建相邻像素估计复运动模型的运动参数，然后将所估计的运动参数应用于当前块的坐标以确定在相应参考块中补偿的运动来估计运动的方法。 这些参数不被传送到解码器，并且在解码器侧导出。 编码器只发送一个1位控制标志来指示是否应该使用派生参数。
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13.发明授权Dual-mode compression of images and videos for reliable real-time transmission 有权图像和视频的双模式压缩可靠的实时传输公开(公告)号：US08964851B2
公开(公告)日：2015-02-24
申请号：US12792408
申请日：2010-06-02
摘要： Dual-mode compression of images/videos for reliable real-time transmission includes a scalable block-based video compression. The method provides graceful quality degradations in case of channel bandwidth changes. Prediction for encoding is avoided, and the process is less complex with less memory requirements. The method involves processing each block independently with the advantage that errors are not able to propagate beyond current block boundaries. Two different encoding modes are used, natural image coding for acquired images and graphics coding for computer generated images. The proper encoding mode is chosen by comparing performance of the two modes for a particular block to be encoded. An embedded bitstream is generated by the encoder in accordance to the available channel bandwidth.
摘要翻译： 用于可靠实时传输的图像/视频的双模式压缩包括可扩展的基于块的视频压缩。 该方法在频道带宽变化的情况下提供优雅的质量下降。 避免编码的预测，并且该过程不太复杂，存储器要求较少。 该方法包括独立地处理每个块，其优点是错误不能传播超出当前块边界。 使用两种不同的编码模式，采集图像的自然图像编码和计算机生成的图像的图形编码。 通过比较要编码的特定块的两种模式的性能来选择适当的编码模式。 嵌入式比特流由编码器根据可用信道带宽生成。
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14.发明申请DECODER-DERIVED GEOMETRIC TRANSFORMATIONS FOR MOTION COMPENSATED INTER PREDICTION 有权用于运动补偿预测的解码多项式几何变换公开(公告)号：US20120218443A1
公开(公告)日：2012-08-30
申请号：US13037054
申请日：2011-02-28
CPC分类号： H04N19/395 , H04N19/103 , H04N19/176 , H04N19/44 , H04N19/46 , H04N19/51 , H04N19/513
摘要： A method of estimating motion by estimating motion parameters of a complex motion model using reconstructed neighboring pixels of the current block and then applying the estimated motion parameters to the coordinates of the current block to determine motion compensated in a corresponding reference block. The parameters are not transmitted to a decoder and are derived at the decoder side. The encoder only sends a 1-bit control-flag to indicate whether the derived parameters should be used.
摘要翻译： 通过使用当前块的重建相邻像素估计复运动模型的运动参数，然后将所估计的运动参数应用于当前块的坐标以确定在相应参考块中补偿的运动来估计运动的方法。 这些参数不被传送到解码器，并且在解码器侧导出。 编码器只发送一个1位控制标志来指示是否应该使用派生参数。
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公开(公告)号：US20110292247A1
公开(公告)日：2011-12-01
申请号：US12789010
申请日：2010-05-27
CPC分类号： H04N19/90 , H04N19/12 , H04N19/124 , H04N19/146 , H04N19/176 , H04N19/46
摘要： An image compression method with random access capability. The method includes intracoding of digital images. The image is partitioned into small blocks and each block is coded independently of other blocks in the image. The encoder generates a fixed and predetermined number of bits for each block. The decoding of each image block is able to be done independently of any other image block.
摘要翻译： 具有随机存取能力的图像压缩方法。 该方法包括数字图像的内部编码。 图像被分割成小块，并且每个块独立于图像中的其他块进行编码。 编码器为每个块生成固定和预定数量的位。 每个图像块的解码能够独立于任何其他图像块进行。
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公开(公告)号：US10057577B2
公开(公告)日：2018-08-21
申请号：US14736597
申请日：2015-06-11
申请人： Hye-Yeon Cheong , Ali Tabatabai
发明人： Hye-Yeon Cheong , Ali Tabatabai
IPC分类号： G06T9/00 , H04N19/124 , H04N19/13 , H04N19/136 , H04N19/184 , H04N19/192 , H04N19/176 , H04N19/593 , H04N19/146
CPC分类号： H04N19/124 , H04N19/13 , H04N19/136 , H04N19/146 , H04N19/176 , H04N19/184 , H04N19/192 , H04N19/593
摘要： Implementations generally relate to pre-charge phase data compression. In some implementations, a method includes computing prediction values for image data, where the image data is pre-charge phase data. The method also includes computing residual data based on the prediction values. The method also includes quantizing the residual data. The method also includes entropy encoding the quantized residual data. The method also includes refining an inverse quantized residual data based on one or more of the residual data and a number of left-over bit-budget after entropy encoding.
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公开(公告)号：US08908755B2
公开(公告)日：2014-12-09
申请号：US13176124
申请日：2011-07-05
申请人： Ehsan Maani , Wei Liu , Ali Tabatabai
发明人： Ehsan Maani , Wei Liu , Ali Tabatabai
CPC分类号： H04N19/52 , H04N19/46 , H04N19/547 , H04N19/56 , H04N19/70
摘要： Motion Compensated Prediction (MCP) has been a key factor in most advanced video compression schemes. For further reduction in the residual signal energy in B-frames, bidirectional prediction where two motion-compensated signals are superimposed has also been utilized in most prior video coding standards such as MPEG-2 or MPEG-4/AVC. Syntax changes and appropriate motion vector prediction that allows efficient use of multi-parameter MCP is described. The prediction signal is constructed by linearly combining the motion-compensated signals from each parameter (or motion vector).
摘要翻译： 运动补偿预测（MCP）一直是大多数高级视频压缩方案的关键因素。 为了进一步降低B帧中的残留信号能量，在大多数先前的视频编码标准（例如MPEG-2或MPEG-4 / AVC）中也已经使用了叠加两个运动补偿信号的双向预测。 描述了允许有效使用多参数MCP的语法改变和适当的运动矢量预测。 通过线性组合来自每个参数（或运动矢量）的运动补偿信号来构造预测信号。
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公开(公告)号：US08787449B2
公开(公告)日：2014-07-22
申请号：US13071258
申请日：2011-03-24
申请人： Cheung Ayeung , Ali Tabatabai , Minh Do
发明人： Cheung Ayeung , Ali Tabatabai , Minh Do
CPC分类号： H04N7/26978 , H04N19/117 , H04N19/159 , H04N19/172 , H04N19/176 , H04N19/192 , H04N19/82 , H04N19/96
摘要： An adaptive loop filter utilizing separable filters within a quadtree-based adaptive loop filter (QALF). The filters for at least the P and B pictures are replaced with a separable filter to provide Separable QALF (SQALF). In a preferred embodiment the filter comprises a Wiener filter as a best fit approximation of the non-separable filter. In response to decoding with the SQALF approach, computational complexity in the decoder is reduced without lowering perceived visual quality. Estimation of the separable filter is obtained in the encoder by iteratively minimizing the sum of squares error with the separable filter. The SQALF filtering is described within a video decoder.
摘要翻译： 一种利用基于四叉树的自适应环路滤波器（QALF）中的可分离滤波器的自适应环路滤波器。 用于至少P和B图像的滤波器被替换为可分离滤波器以提供可分离的QALF（SQALF）。 在优选实施例中，滤波器包括作为不可分离滤波器的最佳拟合近似的维纳滤波器。 响应于使用SQALF方法的解码，解码器中的计算复杂度降低而不降低感知的视觉质量。 通过迭代地使可分离滤波器的平方和误差最小化，可以在编码器中获得可分离滤波器的估计。 在视频解码器中描述了SQALF滤波。
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公开(公告)号：US08787444B2
公开(公告)日：2014-07-22
申请号：US13176132
申请日：2011-07-05
申请人： Ehsan Maani , Wei Liu , Ali Tabatabai
发明人： Ehsan Maani , Wei Liu , Ali Tabatabai
CPC分类号： H04N19/00551 , H04N19/463 , H04N19/593
摘要： Spatial domain directional intra prediction has been shown to be very effective to remove the correlation between the pixels in the current block and reconstructed neighbors. In AVC, 8 directional prediction modes (plus the DC prediction mode) are defined. The prediction mode number is signaled to the decoder using a simple predictive coding method. The previous intra prediction methods have two major disadvantages: lack of precision for arbitrary directional patterns and accuracy lack of accuracy to exploit geometric dependency between blocks. To address these issues, a new method accurately predicts the intra directions from reconstructed neighboring pixels and differentially encode the intra directions. This allows a more precise directional prediction without the significant increase in the cost for transmitting the side information.
摘要翻译： 已经显示空间域定向帧内预测对于去除当前块中的像素与重建的邻居之间的相关性非常有效。 在AVC中，定义了8种方向预测模式（加上DC预测模式）。 使用简单的预测编码方法将预测模式信号发送给解码器。 以前的帧内预测方法有两个主要缺点：对于任意方向模式缺乏精度，精度缺乏利用块之间的几何依赖关系。 为了解决这些问题，一种新的方法准确地预测重建的相邻像素的帧内方向，并对帧内方向进行差分编码。 这允许更精确的方向预测，而不会显着增加用于发送侧信息的成本。
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公开(公告)号：US20120044988A1
公开(公告)日：2012-02-23
申请号：US12859070
申请日：2010-08-18
申请人： Cheung Auyeung , Ali Tabatabai
发明人： Cheung Auyeung , Ali Tabatabai
IPC分类号： H04N7/12
CPC分类号： H04N19/523 , H04N19/117 , H04N19/147 , H04N19/176 , H04N19/194 , H04N19/61
摘要： An apparatus and method are taught for estimating an optimized sub-pixel interpolation filter using iterative and non-iterative estimations as needed for sub-pixel motion compensation and motion estimation in a video codec for improving coding efficiency. Motion vector information and mode decisions are passed from the first encoding stage which uses predetermined interpolation to at least a second encoding stage which uses an estimated adaptive interpolation filter determined during the first encoding stage. Processing overhead is reduced within the subsequent stages. Embodiments are described in which additional stages perform iterative encoding and estimation of interpolation filter in an n-th iteration.
摘要翻译： 教导了一种装置和方法，用于根据视频编解码器中的子像素运动补偿和运动估计所需的迭代和非迭代估计来估计优化的子像素内插滤波器，以提高编码效率。 运动矢量信息和模式决定从使用预定插值的第一编码级传递到使用在第一编码阶段期间确定的估计自适应内插滤波器的至少第二编码级。 处理开销在后续阶段减少。 描述了其中附加级在第n次迭代中执行内插滤波器的迭代编码和估计的实施例。
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