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11. 发明授权

US09924167B2 Video quality measurement considering multiple artifacts 有权
公开(公告)号：US09924167B2
公开(公告)日：2018-03-20
申请号：US14358114
申请日：2011-11-28
申请人： Xiaodong Gu , Debing Liu , Zhibo Chen
发明人： Xiaodong Gu , Debing Liu , Zhibo Chen
IPC分类号： H04N19/103 , H04N19/154 , H04N19/192 , H04N19/48 , H04N19/89 , H04N17/00
CPC分类号： H04N19/192 , H04N17/004 , H04N19/103 , H04N19/154 , H04N19/48 , H04N19/89
摘要： A particular implementation determines objective distortion levels (d,) respectively for a plurality of artifact types. The objective distortion levels are aligned to ensure that the same distortion level of different types of artifacts corresponds to the same perceived distortion level. The aligned distortion levels (d,′) are sorted to obtain sorted distortion levels (d,″). The sorted distortion levels are then pooled together into an overall distortion level or an overall quality metric. The sorted distortion levels may be pooled using a weighted sum, wherein the weight is larger when the sorted distortion level is greater.

12. 发明授权

US08675075B2 Method and apparatus for measuring video quality 有权
标题翻译：用于测量视频质量的方法和装置
公开(公告)号：US08675075B2
公开(公告)日：2014-03-18
申请号：US13811657
申请日：2010-07-30
申请人： Xiaodong Gu , Debing Liu , Zhibo Chen
发明人： Xiaodong Gu , Debing Liu , Zhibo Chen
IPC分类号： H04N17/00 , H04N5/21
CPC分类号： H04N17/00 , H04N5/21 , H04N17/002 , H04N19/139 , H04N19/14 , H04N19/172 , H04N19/89
摘要： A method and apparatus for measuring the quality of a video sequence, which includes a plurality of frames, among which one or more consecutive frames are lost, wherein during the displaying of the video sequence, the one or more lost frames are substituted by an immediate preceding frame in the video sequence during a period from the displaying of the immediate preceding frame to that of an immediate subsequent frame of the one or more lost frames, the method includes measuring the quality of the video sequence as a function of a first parameter (DF) relating to the stability of the immediate preceding frame during the period, a second parameter (DD) relating to the continuity between the immediate preceding frame and the immediate subsequent frame, and a third parameter (DP) relating to the coherent 20 motions of the video sequence.
摘要翻译：一种用于测量包括多个帧的视频序列的质量的方法和装置，其中一个或多个连续帧丢失，其中在显示视频序列期间，一个或多个丢失帧被立即替换在从直接前一帧的显示到所述一个或多个丢失帧的即时后续帧的时间段期间，视频序列中的前一帧的视频序列的前一帧，该方法包括测量作为第一参数的函数的视频序列的质量 DF），与第一参数（DP）有关，该第二参数（DD）涉及在紧接着的前一帧与即时后续帧之间的连续性的第二参数（DD）以及与第二参数视频序列。

13. 发明申请

US20130251045A1 METHOD AND DEVICE FOR DETERMINING A MOTION VECTOR FOR A CURRENT BLOCK OF A CURRENT VIDEO FRAME 审中-公开
标题翻译：用于确定电流视频框架的电流块的运动矢量的方法和装置
公开(公告)号：US20130251045A1
公开(公告)日：2013-09-26
申请号：US13991664
申请日：2010-12-10
申请人： Xiaodong Gu , Debing Liu , Zhibo Chen
发明人： Xiaodong Gu , Debing Liu , Zhibo Chen
IPC分类号： H04N7/36
CPC分类号： H04N19/61 , H04N19/521 , H04N19/57
摘要： A method for determining a motion vector for a current video frame block comprises determining the motion vector using full search. Then, a number of further motion vectors is counted which is the number of motion vectors of neighbouring blocks which are similar to each other and the motion vector. Then it is ascertained that the number meets or exceeds a threshold and that the motion vector is not similar to at least one of the counted further motion vectors. A search region is determined using counted motion vectors and searched for a local best match of the current block. The motion vector is changed towards referencing the local best match. The search region only comprises candidates referenced by motion vector candidates similar to a yet further motion vector pointing to a centre of the further search region. Then, the motion vector resembles the motion presumed by the HVS.
摘要翻译：用于确定当前视频帧块的运动矢量的方法包括使用全搜索来确定运动矢量。然后，计数多个其他运动矢量，它们是彼此相似的相邻块的运动矢量的数量和运动矢量。然后确定该数量满足或超过阈值，并且运动矢量与所计数的进一步的运动矢量中的至少一个不相似。使用计数运动矢量确定搜索区域，并搜索当前块的局部最佳匹配。运动矢量改变为参考局部最佳匹配。搜索区域仅包括由与指向另外的搜索区域的中心的又一运动矢量类似的运动矢量候选引用的候选者。然后，运动矢量类似于由HVS假设的运动。

14. 发明申请

US20140328550A1 BLUR MEASUREMENT 有权
标题翻译：初步测量
公开(公告)号：US20140328550A1
公开(公告)日：2014-11-06
申请号：US14372316
申请日：2012-01-20
申请人： Debing Liu , Zhibo Chen , Xiaodong Gu
发明人： Debing Liu , Zhibo Chen , Xiaodong Gu
IPC分类号： G06T7/00
CPC分类号： G06T7/0002 , G06T5/003 , G06T7/11 , G06T7/194 , G06T2207/20021 , G06T2207/20104 , G06T2207/30168 , H04N17/02
摘要： An image is partitioned into a foreground area, a background area, and optionally a transitional area. The partitioning may be pre-defined, or it may be based on user inputs and configuration data. The partitioning may also be refined based on an initial partitioning. Blur measures are determined respectively for the partitioned areas. A blur measure for the whole image can then be determined from a weighted average of the blur measures for the partitioned areas. The blur measure for the image can be used in a video quality monitor.
摘要翻译：图像被划分为前景区域，背景区域和可选的过渡区域。分区可以是预定义的，或者可以基于用户输入和配置数据。也可以基于初始分区来改进分区。对分割区域分别确定模糊度。然后可以从分割区域的模糊度量的加权平均值确定整个图像的模糊度量。图像的模糊度可用于视频质量监视器。

15. 发明申请

US20130120587A1 METHOD AND APPARATUS FOR MEASURING VIDEO QUALITY 有权
标题翻译：用于测量视频质量的方法和装置
公开(公告)号：US20130120587A1
公开(公告)日：2013-05-16
申请号：US13811657
申请日：2010-07-30
申请人： Xiaodong Gu , Debing Liu , Zhibo Chen
发明人： Xiaodong Gu , Debing Liu , Zhibo Chen
IPC分类号： H04N17/00
CPC分类号： H04N17/00 , H04N5/21 , H04N17/002 , H04N19/139 , H04N19/14 , H04N19/172 , H04N19/89
摘要： The present invention provides a method and corresponding apparatus for measuring the quality of a video sequence. The video sequence is comprised of a plurality of frames, among which one or more consecutive frames are lost. During the displaying of the video sequence, said one or more lost frames are substituted by an immediate preceding frame in the video sequence during a period from the displaying of said immediate preceding frame to that of an immediate subsequent frame of said one or more lost frames. The method comprises: measuring the quality of the video sequence as a function of a first parameter relating to the stability of said immediate preceding frame during said period, a second parameter relating to the continuity between said immediate preceding frame and said immediate subsequent frame, and a third parameter relating to the coherent motions of the video sequence.
摘要翻译：本发明提供一种用于测量视频序列的质量的方法和相应的装置。视频序列由多个帧组成，其中一个或多个连续帧丢失。在显示视频序列期间，在从所述即时前一帧的显示到所述一个或多个丢失帧的即时后续帧的周期期间，所述一个或多个丢失帧被所述视频序列中紧邻的前一帧替代。该方法包括：根据在所述时段期间所述紧接在前的帧的稳定性的第一参数的函数，测量视频序列的质量，与所述即时前一帧和所述即时后续帧之间的连续性有关的第二参数，以及涉及视频序列的相干运动的第三参数。

16. 发明授权

US09715736B2 Method and apparatus to detect artificial edges in images 有权
公开(公告)号：US09715736B2
公开(公告)日：2017-07-25
申请号：US14414721
申请日：2012-08-09
申请人： Debing Liu , Zhibo Chen , Xiaodong Gu
发明人： Debing Liu , Zhibo Chen , Xiaodong Gu
IPC分类号： G06K9/48 , G06T7/00 , H04N19/86
CPC分类号： G06T7/13 , G06T2207/10016 , G06T2207/20012 , H04N19/86
摘要： The present invention generally relates to automatic detection of video artifacts. The present invention relates to automatically detect out the images with visible artifacts due to STB decoding error based on a generated artificial edge map. In particular, the application teaches a method to detect out the images with the visible artifacts and how to identify artificial edges from texture (natural) edges. The present system identifies that artificial edges are most significant in local area, while texture edges are often together with some other texture edges.

17. 发明授权

US09280813B2 Blur measurement 有权
标题翻译：模糊测量
公开(公告)号：US09280813B2
公开(公告)日：2016-03-08
申请号：US14372316
申请日：2012-01-20
申请人： Debing Liu , Zhibo Chen , Xiaodong Gu
发明人： Debing Liu , Zhibo Chen , Xiaodong Gu
IPC分类号： G06K9/52 , G06T7/00 , H04N17/02 , G06T5/00
CPC分类号： G06T7/0002 , G06T5/003 , G06T7/11 , G06T7/194 , G06T2207/20021 , G06T2207/20104 , G06T2207/30168 , H04N17/02
摘要： An image is partitioned into a foreground area, a background area, and optionally a transitional area. The partitioning may be pre-defined, or it may be based on user inputs and configuration data. The partitioning may also be refined based on an initial partitioning. Blur measures are determined respectively for the partitioned areas. A blur measure for the whole image can then be determined from a weighted average of the blur measures for the partitioned areas. The blur measure for the image can be used in a video quality monitor.
摘要翻译：图像被划分为前景区域，背景区域和可选的过渡区域。分区可以是预定义的，或者可以基于用户输入和配置数据。也可以基于初始分区来改进分区。对分割区域分别确定模糊度。然后可以从分割区域的模糊度量的加权平均值确定整个图像的模糊度量。图像的模糊度可用于视频质量监视器。

18. 发明授权

US08879003B1 Distortion/quality measurement 有权
标题翻译：畸变/质量测量
公开(公告)号：US08879003B1
公开(公告)日：2014-11-04
申请号：US14356447
申请日：2011-11-28
申请人： Xiaodong Gu , Debing Liu , Zhibo Chen
发明人： Xiaodong Gu , Debing Liu , Zhibo Chen
IPC分类号： H04N17/00 , H04N5/21
CPC分类号： H04N17/004 , H04N19/154 , H04N19/895
摘要： Various implementations address distortion and quality measurements. Certain implementations relate to distortions resulting in a freeze-with-skip and/or a freeze-without-skip. In one implementation, a pause term provides an indication of distortion associated with a pause arising from not displaying one or more consecutive pictures that are not to be displayed. A motion term provides an indication of distortion associated with a related change in motion. A combined indicator is based on an addition of the pause term and the motion term. In another particular implementation, a first indicator indicates distortion across one or more types of distortive effects that results from not displaying a first set of pictures. A second indicator indicates corresponding distortion with respect to a second set of pictures. The first indicator and the second indicator are combined in a non-linear manner.
摘要翻译：各种实现解决了失真和质量测量。某些实施方式涉及导致冻结与跳过和/或冻结无跳跃的失真。在一个实现中，暂停项提供与不显示一个或多个不被显示的连续图像产生的暂停相关联的失真指示。运动项提供与相关运动变化相关联的失真的指示。组合指示器基于暂停项和运动项的添加。在另一具体实现中，第一指示符指示由不显示第一组图像而导致的一种或多种类型的失真效应的失真。第二指示符指示相对于第二组图像的相应失真。第一指示符和第二指示符以非线性方式组合。

19. 发明授权

US08823873B2 Method and device for calculating blur in video images 有权
标题翻译：用于计算视频图像模糊的方法和装置
公开(公告)号：US08823873B2
公开(公告)日：2014-09-02
申请号：US13500921
申请日：2009-10-10
申请人： Debing Liu , Zhibo Chen , Xaiodong Gu , Feng Xu
发明人： Debing Liu , Zhibo Chen , Xaiodong Gu , Feng Xu
IPC分类号： H04N7/01
CPC分类号： G06T7/0002 , G06T2207/10016 , G06T2207/20004 , G06T2207/20021 , G06T2207/30168 , H04N7/012 , H04N19/117 , H04N19/14 , H04N19/162 , H04N19/85
摘要： Blur is one of the most important features related to image quality. Accurately estimating the blur level of an image is a great help to accurately evaluate its quality. A method for calculating blur of video images comprises calculating a horizontal blur value, and determining characteristic parameters of the video images, including at last progressive/interlaced and spatial resolution level. If the video images are progressive, also a vertical blur value is calculated, and combined with the horizontal blur value. The next step is normalizing the horizontal blur value, or the combined horizontal and vertical blur value, according to predefined min and max values, wherein the min and max values are adapted to the spatial resolution level.
摘要翻译：模糊是与图像质量相关的最重要的功能之一。准确估计图像的模糊水平是准确评估其质量的极大帮助。一种用于计算视频图像模糊的方法包括计算水平模糊值，以及确定视频图像的特征参数，包括最后渐进/隔行扫描和空间分辨率级别。如果视频图像是渐进的，则还计算垂直模糊值，并与水平模糊值组合。下一步是根据预定义的最小值和最大值归一化水平模糊值或组合的水平和垂直模糊值，其中最小值和最大值适应于空间分辨率水平。

20. 发明申请

US20120268652A1 METHOD AND DEVICE FOR CALCULATING BLUR IN VIDEO IMAGES 有权
标题翻译：用于计算视频图像中的图像的方法和装置
公开(公告)号：US20120268652A1
公开(公告)日：2012-10-25
申请号：US13500921
申请日：2009-10-10
申请人： Debing Liu , Zhibo Chen , Xaiodong Gu , Xu Feng
发明人： Debing Liu , Zhibo Chen , Xaiodong Gu , Xu Feng
IPC分类号： H04N7/01
CPC分类号： G06T7/0002 , G06T2207/10016 , G06T2207/20004 , G06T2207/20021 , G06T2207/30168 , H04N7/012 , H04N19/117 , H04N19/14 , H04N19/162 , H04N19/85
摘要： Blur is one of the most important features related to image quality. Accurately estimating the blur level of an image is a great help to accurately evaluate its quality. A method for calculating blur of video images comprises calculating a horizontal blur value, and determining characteristic parameters of the video images, including at last progressive/interlaced and spatial resolution level. If the video images are progressive, also a vertical blur value is calculated, and combined with the horizontal blur value. The next step is normalizing the horizontal blur value, or the combined horizontal and vertical blur value, according to predefined min and max values, wherein the min and max values are adapted to the spatial resolution level.
摘要翻译：模糊是与图像质量相关的最重要的功能之一。准确估计图像的模糊水平是准确评估其质量的极大帮助。一种用于计算视频图像模糊的方法包括计算水平模糊值，以及确定视频图像的特征参数，包括最后渐进/隔行扫描和空间分辨率级别。如果视频图像是渐进的，则还计算垂直模糊值，并与水平模糊值组合。下一步是根据预定义的最小值和最大值归一化水平模糊值或组合的水平和垂直模糊值，其中最小值和最大值适应于空间分辨率水平。

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