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1. 发明授权

US10110921B2 Method of and device for encoding an HDR video together with an LDR video, method of and device for reconstructing one of an HDR video and an LDR video coded together and PF storage medium 有权
公开(公告)号：US10110921B2
公开(公告)日：2018-10-23
申请号：US14370773
申请日：2012-12-18
申请人： THOMSON LICENSING
发明人： Yannick Olivier , David Touze , Philippe Bordes , Franck Hiron
IPC分类号： H04N19/36 , H04N19/597 , H04N19/30 , H04N19/61 , H04N19/59 , H04N19/50
摘要： The inventors realized that representing HDR content using LDR content and HDR residual is not unproblematic. The invention therefore proposes representing HDR content using LDR content, LDR residual and global illumination data, instead. That is, it is proposed a method of encoding an HDR video of high dynamic range together with an LDR video, the LDR video providing a lower dynamic range depiction of the HDR video content, the method comprising using processing means for encoding one video of the LDR video and a further LDR video extracted from the HDR video independent from the other video of the LDR video and the HDR video and predictive encoding the other video using the one video as reference, and lossless encoding global illumination data further extracted from the HDR video. This has the advantage that prediction is more stable and globally optimal predictors are more easily found.

2. 发明申请

US20140369410A1 METHOD OF AND DEVICE FOR ENCODING AN HDR VIDEO TOGETHER WITH AN LDR VIDEO, METHOD OF AND DEVICE FOR RECONSTRUCTING ONE OF AN HDR VIDEO AND AN LDR VIDEO CODED TOGETHER AND PF STORAGE MEDIUM 审中-公开
标题翻译：用于用LDR视频编码HDR视频的方法和装置，用于重新编码HDR视频和LDR视频编码的一个和PF存储介质的方法和装置
公开(公告)号：US20140369410A1
公开(公告)日：2014-12-18
申请号：US14370773
申请日：2012-12-18
申请人： THOMSON LICENSING
发明人： Yannick Olivier , David Touze , Philippe Bordes , Franck Hiron
IPC分类号： H04N19/36 , H04N19/597 , H04N19/59
CPC分类号： H04N19/597 , H04N19/30 , H04N19/36 , H04N19/50 , H04N19/59 , H04N19/61
摘要： The inventors realized that representing HDR content using LDR content and HDR residual is not unproblematic. The invention therefore proposes representing HDR content using LDR content, LDR residual and global illumination data, instead. That is, it is proposed a method of encoding an HDR video of high dynamic range together with an LDR video, the LDR video providing a lower dynamic range depiction of the HDR video content, the method comprising using processing means for encoding one video of the LDR video and a further LDR video extracted from the HDR video independent from the other video of the LDR video and the HDR video and predictive encoding the other video using the one video as reference, and lossless encoding global illumination data further extracted from the HDR video. This has the advantage that prediction is more stable and globally optimal predictors are more easily found.
摘要翻译：发明人意识到，使用LDR内容和HDR残差代表HDR内容不是没有问题。因此，本发明提出了使用LDR内容，LDR残差和全局照明数据代表HDR内容。也就是说，提出了一种将高动态范围的HDR视频与LDR视频一起编码的方法，LDR视频提供HDR视频内容的较低的动态范围描绘，该方法包括使用处理装置对一个视频进行编码 LDR视频和从HDR视频中独立于LDR视频和HDR视频的另一视频提取的另一LDR视频，并且使用一个视频作为参考来对其他视频进行预测编码，以及从HDR视频进一步提取的无损编码全局照明数据。这具有预测更稳定并且更容易找到全局最优预测器的优点。

3. 发明授权

US10148958B2 Method and device for encoding and decoding a HDR picture and a LDR picture 有权
公开(公告)号：US10148958B2
公开(公告)日：2018-12-04
申请号：US14953017
申请日：2015-11-27
申请人： THOMSON LICENSING
发明人： Yannick Olivier , David Touze , Catherine Serre
IPC分类号： H04N19/122 , H04N19/30 , H04N19/184 , H04N19/50 , H04N19/98
摘要： At least one of the present embodiments generally relates to a method for encoding a HDR picture and a first LDR picture, the method comprising obtaining a second LDR picture responsive to a ratio between the HDR picture and a backlight picture and encoding the first LDR picture and the second LDR picture by predicting one of the first and second LDR pictures by the other one of the first and second LDR pictures. The method wherein it further comprises, before encoding, adjusting the first LDR picture responsive to the backlight picture. The disclosure relates also to a method and device for decoding an LDR picture providing a lower dynamic range depiction of the picture content of an HDR picture.

4. 发明授权

US09747674B2 Method and device for converting an image sequence whose luminance values belong to a high dynamic range 有权
公开(公告)号：US09747674B2
公开(公告)日：2017-08-29
申请号：US14415600
申请日：2013-01-29
申请人： THOMSON LICENSING
发明人： Ronan Boitard , Dominique Thoreau , Yannick Olivier
IPC分类号： G06T5/00
CPC分类号： G06T5/009 , G06T5/007 , G06T2207/20208
摘要： The invention relates to a method and a device for converting an original image sequence (SIO) whose luminance values belong to a given dynamic range, said method comprising a step of image-by-image dynamic range conversion during which a dynamic range conversion operator (TMO) is applied to the luminance component (Lw(i)) of each image of the original image sequence (SIO) to obtain a modified luminance component whose values belong to a lower dynamic range than that of the original image sequence (SIO). The method is characterized in that it also comprises a step of correction of the dynamic range during which the dynamic range of the values of the luminance component thus modified is reduced by a value calculated from a global characteristic of the original image sequence.

5. 发明授权

US09489726B2 Method for processing a video sequence, corresponding device, computer program and non-transitory computer-readable-medium 有权
标题翻译：用于处理视频序列，相应设备，计算机程序和非暂时性计算机可读介质的方法
公开(公告)号：US09489726B2
公开(公告)日：2016-11-08
申请号：US14659942
申请日：2015-03-17
申请人： THOMSON LICENSING
发明人： Ronan Boitard , Dominique Thoreau , Yannick Olivier , Philippe Guillotel
IPC分类号： G06T5/00 , H04N5/232 , H04N5/235 , H04N5/243
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.

6. 发明授权

US10805506B2 Method and apparatus for encoding color mapping information and processing pictures based on color mapping information 有权
公开(公告)号：US10805506B2
公开(公告)日：2020-10-13
申请号：US15549187
申请日：2016-02-19
申请人： THOMSON LICENSING
发明人： Yannick Olivier , Sébastien Lasserre , Pierre Andrivon , Philippe Bordes
IPC分类号： H04N1/60 , H04N19/46
摘要： Color mapping information can be used to transform one color to another color. The present embodiments provide a solution for representing the color mapping information using a successive application of multiple color mapping functions. Parameters for the multiple color mapping functions can be encoded into a bitstream. In one embodiment, color mapping functions are consecutively applied on their own domains of definition only. In another embodiment, the first color mapping (CRI1) is applied on its domain of definition only, but the second color mapping is applied only on samples that have been previously color mapped by CRI1 and which are also inside the domain of definition of the second color mapping function. At the decode side, the multiple color mapping functions can be reconstructed and successively applied to a decoded picture to generate another picture.

7. 发明授权

US09681140B2 Device and a method for encoding an image and corresponding decoding method and decoding device 有权
公开(公告)号：US09681140B2
公开(公告)日：2017-06-13
申请号：US14970763
申请日：2015-12-16
申请人： THOMSON LICENSING
发明人： Fabrice Le Leannec , Sebastien Lasserre , Yannick Olivier
IPC分类号： G06K9/00 , H04N19/186 , H04N19/124 , H04N19/63 , H04N19/18 , H04N19/147 , H04N19/103 , H04N19/126
CPC分类号： H04N19/186 , H04N19/103 , H04N19/124 , H04N19/126 , H04N19/147 , H04N19/18 , H04N19/63
摘要： A method for encoding an image represented in a perceptual color space is described. The image has at least a luminance component. The method includes transforming by a wavelet transform the luminance component to form at least one low frequency subband of wavelet coefficients, reconstructing a low frequency component for at least one spatial area of the low frequency subband, subtracting the reconstructed low frequency component from the wavelet coefficients of the spatial area, quantizing the wavelet coefficients of the spatial area responsive to the threshold, the threshold being proportional to the reconstructed low frequency component of the spatial area and encoding the quantized wavelet coefficients and the low frequency component.

8. 发明申请

US20150248746A1 METHOD AND APPARATUS FOR COMPENSATING ILLUMINATION VARIATIONS IN A SEQUENCE OF IMAGES 有权
标题翻译：用于在图像序列中补偿照明变化的方法和装置
公开(公告)号：US20150248746A1
公开(公告)日：2015-09-03
申请号：US14429033
申请日：2013-08-27
申请人： THOMSON LICENSING
发明人： Philippe Bordes , Yannick Olivier , David Touze , Franck Hiron
IPC分类号： G06T5/00 , H04N19/117 , H04N19/176 , H04N19/597 , H04N19/139 , H04N19/14 , H04N19/196 , H04N19/46 , G06T5/40 , H04N19/51
CPC分类号： G06T5/008 , G06T5/40 , G06T2207/10016 , H04N19/117 , H04N19/139 , H04N19/14 , H04N19/176 , H04N19/196 , H04N19/46 , H04N19/51 , H04N19/597
摘要： In order to take into account the local illumination variations in a scene, the invention proposes a method of compensating illumination variations in which distributions are determined for each block of an image (or view) and, in order to avoid a loss of the video coding efficiency, a distribution-based mapping function is automatically computed by a remote apparatus, such a decoder, from only information available at that apparatus when decoding a current block of the sequence of images. The present invention relates also to a method and device of encoding and/or decoding a sequence of images which comprises means configured to implement the method of compensating illumination variations according to the invention.
摘要翻译：为了考虑场景中的局部照明变化，本发明提出了一种对图像（或视图）的每个块确定分布的补偿照明变化的方法，并且为了避免视频编码的丢失效率，当解码图像序列的当前块时，远程装置（例如解码器）自动地计算基于分布的映射函数，仅从该设备处可获得的信息。本发明还涉及一种编码和/或解码图像序列的方法和装置，其包括被配置为实现根据本发明的补偿照明变化的方法的装置。

9. 发明申请

US20150178904A1 METHOD AND DEVICE FOR CONVERTING AN IMAGE SEQUENCE WHOSE LUMINANCE VALUES BELONG TO A HIGH DYNAMIC RANGE 有权
标题翻译：用于将照亮值的图像序列转换为高动态范围的方法和装置
公开(公告)号：US20150178904A1
公开(公告)日：2015-06-25
申请号：US14415600
申请日：2013-01-29
申请人： THOMSON LICENSING
发明人： Ronan Boitard , Dominique Thoreau , Yannick Olivier
IPC分类号： G06T5/00
CPC分类号： G06T5/009 , G06T5/007 , G06T2207/20208
摘要： The invention relates to a method and a device for converting an original image sequence (SIO) whose luminance values belong to a given dynamic range, said method comprising a step of image-by-image dynamic range conversion during which a dynamic range conversion operator (TMO) is applied to the luminance component (Lw(i)) of each image of the original image sequence (SIO) to obtain a modified luminance component whose values belong to a lower dynamic range than that of the original image sequence (SIO). The method is characterised in that it also comprises a step of correction of the dynamic range during which the dynamic range of the values of the luminance component thus modified is reduced by a value calculated from a global characteristic of the original image sequence.
摘要翻译：本发明涉及一种用于转换其亮度属于给定动态范围的原始图像序列（SIO）的方法和装置，所述方法包括逐像素动态范围转换的步骤，在该步骤中动态范围转换操作符（ TMO）被应用于原始图像序列（SIO）的每个图像的亮度分量（Lw（i）），以获得其值属于比原始图像序列（SIO）的动态范围更低的修改亮度分量。该方法的特征在于还包括校正动态范围的步骤，在该步骤中，通过从原始图像序列的全局特性计算出的值，将所修改的亮度分量的值的动态范围减小。

10. 发明授权

US10219007B2 Method and device for signaling in a bitstream a picture/video format of an LDR picture and a picture/video format of a decoded HDR picture obtained from said LDR picture and an illumination picture 有权
公开(公告)号：US10219007B2
公开(公告)日：2019-02-26
申请号：US15320302
申请日：2015-06-04
申请人： THOMSON LICENSING
发明人： Edouard Francois , Sebastien Lasserre , Fabrice Le Leannec , Pierre Andrivon , Yannick Olivier , David Touze
IPC分类号： G06K9/36 , H04N19/70 , H04N19/30 , H04N19/85 , H04N19/172
摘要： A method, device, computer program product and a processor readable medium is provided for signaling, in a bitstream representing a LDR picture obtained from an HDR picture. In one embodiment, both a picture/video format of a decoded version of the LDR picture, denoted an output LDR format, and a picture/video format of a decoded version of the HDR picture, denoted an output HDR format is provided. In one embodiment, the method includes encoding in the bitstream a second syntax element which is distinct from the first syntax element and which defines the output HDR format.

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