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

发明人： Ronan Boitard ,  Dominique Thoreau ,  Kadi Bouatouch ,  Remi Cozot ,  Catherine Serre

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.

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

发明人： David Touze ,  Yannick Olivier ,  Dominique Thoreau ,  Catherine Serre

IPC分类号： G06K9/00 ,  H04N19/33 ,  H04N19/61 ,  H04N19/98 ,  H04N5/202

CPC分类号： H04N19/33 ,  H04N5/202 ,  H04N19/61 ,  H04N19/98

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.

公开(公告)号：US20160156908A1

公开(公告)日：2016-06-02

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 ,  H04N19/184

CPC分类号： H04N19/122 ,  H04N19/184 ,  H04N19/30 ,  H04N19/50 ,  H04N19/98

摘要： The present disclosure 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.

摘要翻译： 本公开总体上涉及用于编码HDR图像和第一LDR图像的方法，所述方法包括响应于HDR图像和背光图像之间的比率获得第二LDR图像，并且对第一LDR图像和第二LDR图像进行编码 通过预测第一和第二LDR图像中的另一个LDR图像中的一个LDR图像。 该方法还包括在编码之前响应于背光照片调整第一LDR图像。 本公开还涉及用于对提供HDR图像的图像内容的较低动态范围描绘的LDR图像进行解码的方法和装置。

公开(公告)号：US10313647B2

公开(公告)日：2019-06-04

申请号：US15288405

申请日：2016-10-07

申请人： THOMSON LICENSING

发明人： Catherine Serre ,  Jurgen Stauder ,  Sebastien Lasserre

IPC分类号： H04N9/64 ,  H04N1/60

摘要： According to this method, upon reception of a color transform associated with a main sequence, a transition sequence is generated from successive images of this main sequence such that the first image of this transition sequence is an image received after reception of this color transform, transition color transforms associated with images of said transition sequence are generated by blending a color transform associated with a previous main sequence or no color transform with the second color transform, and each image of this transition sequence is processed using the transition color transform associated with said image.

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.