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2.发明公开
公开(公告)号：EP3468182A1
公开(公告)日：2019-04-10
申请号：EP17306351.2
申请日：2017-10-06
IPC分类号： H04N13/00
摘要： A colored point cloud is encoded as at least two images. The point cloud is projected onto two maps, the second map comprising a set of blocks. An interest value is computed for each block of the second map as a function of the number of points of the point cloud projected onto the given block, not already projected on the first map. The first image is encoded in the stream as obtained by the projection while blocks of the second image are encoded according to their interest value. Blocks comprising no or a few new points over the first image and/or comprising a frontier are encoded in manner that minimize their bitrate as the information they carry is already stored in the first image.
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3.发明公开
公开(公告)号：EP3467786A1
公开(公告)日：2019-04-10
申请号：EP18197880.0
申请日：2018-10-01
摘要： A colored three-dimensional point cloud is encoded in at least two depth and texture images. The proposed method and device inverse project pixels of the first image and inverse project pixels to the second image. When the inverse projecting of a first pixel of the first image and the inverse projecting of a second pixel of the second image refer to a common generated point, that is two 3D points closer to each other than the imprecision due to the encoding and compression of the images, the color value of the pixel of first and second pixels having the lowest local depth variance is attributed to the common generated point.
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公开(公告)号：EP3453177A1
公开(公告)日：2019-03-13
申请号：EP17720445.0
申请日：2017-04-26
IPC分类号： H04N19/463 , H04N19/30 , H04N19/184 , H04N19/186 , H04N19/85 , H04N19/467
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公开(公告)号：EP4462365A2
公开(公告)日：2024-11-13
申请号：EP24203197.9
申请日：2019-01-21
IPC分类号： G06T9/00
摘要： A method for reconstructing a geometry of a point cloud is provided wherein at least one current 3D sample of the point cloud is reconstructed using at least one geometry image storing depth values of 3D samples of the point cloud, a first depth difference is determined as a maximum depth difference between depth values of neighboring 3D sample of the current 3D sample and a depth value of the current 3D sample, wherein said first depth difference equals to or is higher than a first value, neighboring 3D samples and the current 3D sample are projected onto the geometry and belong to a same patch of the geometry image, at least one 3D sample is added to the point cloud at a same 2D location as a 2D sample representing the projection of the current 3D sample, up to the sum of the depth value of the current 3D sample and the first depth difference.
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公开(公告)号：EP3821607A1
公开(公告)日：2021-05-19
申请号：EP19742508.5
申请日：2019-07-10
发明人： RICARD, Julien , GUEDE, Celine , OLIVIER, Yannick
IPC分类号： H04N19/597
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公开(公告)号：EP3493150A1
公开(公告)日：2019-06-05
申请号：EP17306670.5
申请日：2017-11-30
IPC分类号： G06T5/00
摘要： A system and methods is provided for performing, by a processor, an initial tone mapping function on a first image to produce a second image. The first and second images are of different dynamic ranges. The method also includes applying, by the processor, a second tone mapping function to the second image when it contains any saturated portions. The second tone mapping function lowers luminance by a first fraction. The overall luminance of the second image is also determined and a fine tuning filter is applied when at least portions of said second image contain areas darker than an amount.
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