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公开(公告)号：US10652577B2
公开(公告)日：2020-05-12
申请号：US15759215
申请日：2016-09-14
申请人： THOMSON Licensing
IPC分类号： H04N19/597 , H04N19/15 , H04N19/577 , G06T15/20 , H04N13/161 , H04N19/103 , H04N19/172
摘要： The present disclosure generally relates to a method for predicting at least one block of pixels of a view (170) belonging to a matrix of views (17) obtained from light-field data belong with a scene, According to present disclosure, the method is implemented by a processor and comprises for at least one pixel to predict of said block of pixels: —from said matrix of views (17), obtaining (51) at least one epipolar plane image (EPI) belong with said at least one pixel to predict, —among a set of bidirectional prediction modes, determining (52) at least one optimal bidirectional prediction mode from a set of previous reconstructed pixels neighbouring said at least one pixel to predict in said at least one epipolar plane image, —extrapolating (53) a prediction value of said at least one pixel to predict by using said at least one optimal bidirectional prediction mode.
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公开(公告)号：US09984442B2
公开(公告)日：2018-05-29
申请号：US15115655
申请日：2015-01-15
申请人： THOMSON LICENSING
CPC分类号： G06T3/4076 , G06T5/20 , G06T5/50
摘要： A method for enhancing quality of an image comprises deriving from an initial low-resolution image (LRI) an initial high-resolution image (IHRI) by upsampling (S2, S3), providing (S4), based on the initial low-resolution image (LRI), at least one downsampled filtered image (AIij, AIi′j′) with lower resolution, providing (S6), based on the initial low-resolution image (LRI), an unfiltered image (LRI, UIi′j′) having same resolution as the downsampled filtered image, selecting a patch (PI) from the initial high-resolution image (IHRI), finding (S8) filial patches (PA k) similar to the selected patch in the downsampled filtered image (AIij, AIi′j′), finding, in the unfiltered image (LRI, UIi′j′), parent patches (PPk) locally associated to the filial patches (PAk), and linearly combining (S14) the parent patches (PPk) to form an enhanced quality patch (EP). Finally, enhanced quality patches (EP) obtained by repeatedly carrying out above steps are combined (S15) to form an enhanced quality high-resolution image (EIp).
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公开(公告)号：US09979973B2
公开(公告)日：2018-05-22
申请号：US14897234
申请日：2014-06-02
申请人： THOMSON LICENSING
摘要： A method for encoding a sequence of high dynamic range pictures is disclosed. The method comprises for each picture of the sequence: obtaining a value representative of an average luminance of the high dynamic range picture; processing the high dynamic range picture so that the value representative of an average luminance of the processed picture is closer to a defined average luminance value than is the value representative of an average luminance of the high dynamic range picture; decomposing the processed high dynamic range picture in at least one first low dynamic range picture and one second low dynamic range picture of lower resolution representative of a global illumination of the scene; and encoding the first and second low dynamic range pictures and a data function of said value representative of an average luminance of said high dynamic range picture.
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公开(公告)号：US09652830B2
公开(公告)日：2017-05-16
申请号：US14382569
申请日：2013-03-04
申请人： THOMSON LICENSING
CPC分类号： G06T3/4076 , G06T3/4053 , G06T3/4084 , G06T5/50 , G06T2207/20052 , G06T2207/20216
摘要： Super-resolution refers to a process of recovering the missing high-frequency details of a given low-resolution image. Known single image SR algorithms are often computationally intractable or unusable for most of the practical applications. The invention relates to a method for performing hierarchical super-resolution based on self content neighboring patches information is based on pyramidal decomposition. The intrinsic geometric property of an input LR patch neighborhood is obtained from the input LR patch and its K nearest neighbors taken from different down-scaled versions of the LR image.
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5.发明申请METHOD FOR PROCESSING A VIDEO SEQUENCE, CORRESPONDING DEVICE, COMPUTER PROGRAM AND NON-TRANSITORY COMPUTER-READABLE-MEDIUM 审中-公开处理视频序列的方法，相应的设备，计算机程序和非终端计算机可读介质公开(公告)号：US20150269714A1
公开(公告)日：2015-09-24
申请号：US14659942
申请日：2015-03-17
申请人： THOMSON LICENSING
IPC分类号： G06T5/00
CPC分类号： G06T5/009 , G06T2207/10016 , G06T2207/20208 , H04N5/23238 , H04N5/2351 , H04N5/243
摘要： The invention relates to a method for processing a video sequence formed by at least two video images, said method comprising: obtaining said at least two video images using a first capture module with a first field of view, each video image representing a same scene captured at different instants or from different points of view, wherein said method comprises: determining luminance information from at least one overall image obtained by a second capture module with a second field of view greater than said first field of view, said overall image representing the scene captured at different instants or from different points of view, down-converting a dynamic range of said video images taking into account said luminance information.
摘要翻译： 本发明涉及一种用于处理由至少两个视频图像形成的视频序列的方法，所述方法包括：使用具有第一视场的第一捕获模块获得所述至少两个视频图像，每个视频图像代表相同的场景 其中所述方法包括：从具有大于所述第一视野的第二视场的第二捕获模块获得的至少一个整体图像中确定亮度信息，所述整体图像代表场景 在不同时刻或不同观点拍摄，考虑所述亮度信息，对所述视频图像的动态范围进行下变频。
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6.发明申请METHOD FOR CODING AND RECONSTRUCTING A PIXEL BLOCK AND CORRESPONDING DEVICES 审中-公开用于编码和重构像素块和相应设备的方法公开(公告)号：US20130329786A1
公开(公告)日：2013-12-12
申请号：US13683267
申请日：2012-11-21
申请人： Thomson Licensing
IPC分类号： H04N7/50
CPC分类号： H04N19/176 , H04N19/122 , H04N19/136 , H04N19/18 , H04N19/60 , H04N19/61
摘要： A method for coding a block of pixels is disclosed. The method for coding comprises: calculating a block of residues from the pixel block and a prediction block, transforming the block of residues into a block of coefficients with a transform defined by a set of basis functions, coding the block of coefficients, The method comprises, before the transformation step, a step for rephasing basis functions from residues calculated in a causal neighbourhood of the pixel block. The transformation step uses the rephased basis functions.
摘要翻译： 公开了一种用于对像素块进行编码的方法。 用于编码的方法包括：从像素块和预测块计算残差块，使用由一组基函数定义的变换将残差块变换成系数块，对系数块进行编码。该方法包括 在变换步骤之前，从像素块的因果邻域中计算的残差中重新基准函数的步骤。 转换步骤使用重新定位的基函数。
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公开(公告)号：US20180376151A1
公开(公告)日：2018-12-27
申请号：US15992129
申请日：2018-05-29
申请人： THOMSON Licensing
IPC分类号： H04N19/177 , H04N19/176 , H04N19/182 , H04N19/513 , H04N19/124 , H04N19/159 , H04N19/44
摘要： A method for encoding a current image in an image set is disclosed. The method incudes accessing a reference image for the current image, determining at least one prediction image wherein a prediction image is obtained from a geometric transform applied to the reference image, the prediction image being a prediction for at least one region of current image, encoding the current image based on the at least a prediction image using block matching compensation, generating a bitstream comprising the encoded image, an item representative of the reference image and an item representative of the at least one geometric transform.
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公开(公告)号：US10045024B2
公开(公告)日：2018-08-07
申请号：US15038769
申请日：2014-11-25
申请人： THOMSON LICENSING
IPC分类号： H04N11/02 , H04N19/124 , G06T5/00 , H04N19/176 , H04N19/61 , H04N19/157
摘要： The invention relates to a method and device for quantising the floating value of a pixel of an image by rounding either to a lesser whole number, to a greater whole number, or to the whole number closest to this floating value. The method is characterised in that the selection of rounding this floating value is determined based on a test value.
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公开(公告)号：US09767542B2
公开(公告)日：2017-09-19
申请号：US14771199
申请日：2014-02-25
申请人： THOMSON LICENSING
发明人： Ronan Boitard , Dominique Thoreau , Kadi Bouatouch , Remi Cozot
IPC分类号： G06K9/36 , G06T5/00 , H04N19/147 , H04N19/154 , G06K9/46
CPC分类号： G06T5/007 , G06K9/4661 , G06T2207/20208 , H04N19/147 , H04N19/154
摘要： The invention relates to a method for selecting an image dynamic range conversion operator from among a set of image dynamic range conversion operators by optimizing a quality criterion, each image dynamic range conversion operator being applied to an original image to obtain an image, called the modified image, whose dynamic range is lower than that of the original image, wherein said quality criterion is calculated, for each image dynamic range conversion operator, as a function of a distortion calculated from a reconstructed version after coding and decoding the original image modified by said image dynamic range conversion operator.
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公开(公告)号：US09661334B2
公开(公告)日：2017-05-23
申请号：US14608168
申请日：2015-01-28
申请人： THOMSON LICENSING
IPC分类号： H04N19/176 , H04N19/89 , H04N19/593 , H04N19/90 , H04N19/147
CPC分类号： H04N19/176 , H04N19/147 , H04N19/593 , H04N19/89 , H04N19/99
摘要： A method for constructing an epitome from an image divided into non overlapping blocks is disclosed. The method comprises: determining, for each block, similar patches in the image, a similar patch being a patch with similar content; constructing at least one epitome chart for the picture from the similar patches; wherein determining, for each block, similar patches in the image comprises: a) determining, for each current block, similar blocks in the image, a similar block being a block with content similar to the content of the current block; b) determining, for one current block and for the similar blocks determined for the current block, similar patches in the image, a similar patch being a patch with content similar to the content of the current block; c) repeating step b) for a next current block for which no similar patch is determined until at least one similar patch is determined for each block in the image.
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