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1.发明授权System and process for compressing and decompressing multiple, layered, video streams employing spatial and temporal encoding 有权用于使用空间和时间编码来压缩和解压缩多个分层的视频流的系统和过程公开(公告)号：US07561620B2
公开(公告)日：2009-07-14
申请号：US10910077
申请日：2004-08-03
CPC分类号： H04N21/4347 , H04N13/111 , H04N19/109 , H04N19/39 , H04N19/593 , H04N19/597 , H04N19/61 , H04N19/70 , H04N19/96 , H04N21/2365
摘要： A system and process for compressing and decompressing multiple video streams depicting substantially the same dynamic scene from different viewpoints. Each frame in each contemporaneous set of video frames of the multiple streams is represented by at least a two layers—a main layer and a boundary layer. Compression of the main layers involves first designating one or more of these layers in each set of contemporaneous frames as keyframes. For each set of contemporaneous frames in time sequence order, the main layer of each keyframe is compressed using an inter-frame compression technique. In addition, the main layer of each non-keyframe within the frame set under consideration is compressed using a spatial prediction compression technique. Finally, the boundary layers of each frame in the current frame set are each compressed using an intra-frame compression technique. Decompression is generally the reverse of the compression process.
摘要翻译： 一种用于压缩和解压缩从不同观点描绘基本相同的动态场景的多个视频流的系统和过程。 多个流的每个同期视频帧集合中的每个帧由至少两层（主层和边界层）表示。 主要层的压缩包括首先将每组同期帧中的这些层中的一个或多个指定为关键帧。 对于按时间顺序排列的每组同期帧，使用帧间压缩技术对每个关键帧的主层进行压缩。 另外，使用空间预测压缩技术对所考虑的帧集合内的每个非关键帧的主层进行压缩。 最后，使用帧内压缩技术对当前帧集合中每帧的边界层进行压缩。 压缩通常与压缩过程相反。
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公开(公告)号：US07324687B2
公开(公告)日：2008-01-29
申请号：US10879327
申请日：2004-06-28
IPC分类号： G06K9/00
CPC分类号： G06K9/20 , G06K2209/40 , G06T7/55
摘要： A system and process for computing a 3D reconstruction of a scene from multiple images thereof, which is based on a color segmentation-based approach, is presented. First, each image is independently segmented. Second, an initial disparity space distribution (DSD) is computed for each segment, using the assumption that all pixels within a segment have the same disparity. Next, each segment's DSD is refined using neighboring segments and its projection into other images. The assumption that each segment has a single disparity is then relaxed during a disparity smoothing stage. The result is a disparity map for each image, which in turn can be used to compute a per pixel depth map if the reconstruction application calls for it.
摘要翻译： 提出了一种用于基于基于颜色分割的方法从其多个图像计算场景的3D重建的系统和过程。 首先，每个图像被独立地分割。 第二，使用假设一个段内的所有像素具有相同的视差来为每个段计算初始视差空间分布（DSD）。 接下来，每个段的DSD使用相邻段进行细化，并将其投影到其他图像中。 然后在视差平滑阶段放宽每个段具有单个视差的假设。 结果是每个图像的视差图，如果重建应用程序需要它，它又可以用于计算每像素深度图。
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公开(公告)号：US07221366B2
公开(公告)日：2007-05-22
申请号：US10910088
申请日：2004-08-03
IPC分类号： G06T15/20
CPC分类号： G06T15/205
摘要： A system and process for rendering and displaying an interactive viewpoint video is presented in which a user can watch a dynamic scene while manipulating (freezing, slowing down, or reversing) time and changing the viewpoint at will. The ability to interactively control viewpoint while watching a video is an exciting new application for image-based rendering. Because any intermediate view can be synthesized at any time, with the potential for space-time manipulation, this type of video has been dubbed interactive viewpoint video.
摘要翻译： 呈现用于呈现和显示交互式视点视频的系统和过程，其中用户可以在操纵（冻结，减速或反转）时间并随意改变视点的同时观看动态场景。 在观看视频时交互控制视点的能力是基于图像的渲染的令人兴奋的新应用。 因为任何中间视图可以随时被合成，具有时空操纵的潜力，这种类型的视频被称为交互视点视频。
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4.发明授权公开(公告)号：US08098728B2
公开(公告)日：2012-01-17
申请号：US11182144
申请日：2005-07-15
CPC分类号： H04N21/4347 , H04N13/111 , H04N19/109 , H04N19/39 , H04N19/593 , H04N19/597 , H04N19/61 , H04N19/70 , H04N19/96 , H04N21/2365
摘要： A process for compressing and decompressing non-keyframes in sequential sets of contemporaneous video frames making up multiple video streams where the video frames in a set depict substantially the same scene from different viewpoints. Each set of contemporaneous video frames has a plurality frames designated as keyframes with the remaining being non-keyframes. In one embodiment, the non-keyframes are compressed using a multi-directional spatial prediction technique. In another embodiment, the non-keyframes of each set of contemporaneous video frames are compressed using a combined chaining and spatial prediction compression technique. The spatial prediction compression technique employed can be a single direction technique where just one reference frame, and so one chain, is used to predict each non-keyframe, or it can be a multi-directional technique where two or more reference frames, and so chains, are used to predict each non-keyframe.
摘要翻译： 一种用于在构成多个视频流的同步视频帧的顺序集合中压缩和解压缩非关键帧的过程，其中集合中的视频帧从不同视点描绘基本相同的场景。 每组同时期的视频帧具有指定为关键帧的多个帧，其余的是非关键帧。 在一个实施例中，使用多方向空间预测技术来压缩非关键帧。 在另一个实施例中，使用组合链接和空间预测压缩技术来压缩每组同时期视频帧的非关键帧。 所使用的空间预测压缩技术可以是单向技术，其中仅使用一个参考帧，因此使用一条链来预测每个非关键帧，或者它可以是多方向技术，其中两个或更多个参考帧等 链，用于预测每个非关键帧。
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5.发明授权Color segmentation-based stereo 3D reconstruction system and process employing overlapping images of a scene captured from viewpoints forming either a line or a grid 有权基于颜色分割的立体3D重建系统和使用从形成线或网格的视点捕获的场景的重叠图像的过程公开(公告)号：US07379583B2
公开(公告)日：2008-05-27
申请号：US11097529
申请日：2005-03-31
IPC分类号： G06K9/00
CPC分类号： G06K9/20 , G06K2209/40 , G06T7/55
摘要： A system and process for computing a 3D reconstruction of a scene from multiple images thereof, which is based on a color segmentation-based approach, is presented. First, each image is independently segmented. Second, an initial disparity space distribution (DSD) is computed for each segment, using the assumption that all pixels within a segment have the same disparity. Next, each segment's DSD is refined using neighboring segments and its projection into other images. The assumption that each segment has a single disparity is then relaxed during a disparity smoothing stage. The result is a disparity map for each image, which in turn can be used to compute a per pixel depth map if the reconstruction application calls for it.
摘要翻译： 提出了一种用于基于基于颜色分割的方法从其多个图像计算场景的3D重建的系统和过程。 首先，每个图像被独立地分割。 第二，使用假设一个段内的所有像素具有相同的视差来为每个段计算初始视差空间分布（DSD）。 接下来，每个段的DSD使用相邻段进行细化，并将其投影到其他图像中。 然后在视差平滑阶段放宽每个段具有单个视差的假设。 结果是每个图像的视差图，如果重建应用程序需要它，它又可以用于计算每像素深度图。
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公开(公告)号：US07292257B2
公开(公告)日：2007-11-06
申请号：US10880774
申请日：2004-06-28
CPC分类号： H04N5/2627 , G06T7/557 , G06T7/596 , G06T15/205 , G06T2207/10021
摘要： A system and process for generating, and then rendering and displaying, an interactive viewpoint video in which a user can watch a dynamic scene while manipulating (freezing, slowing down, or reversing) time and changing the viewpoint at will. In general, the interactive viewpoint video is generated using a small number of cameras to capture multiple video streams. A multi-view 3D reconstruction and matting technique is employed to create a layered representation of the video frames that enables both efficient compression and interactive playback of the captured dynamic scene, while at the same time allowing for real-time rendering.
摘要翻译： 一种用于生成并再现和显示交互视点视频的系统和过程，其中用户可以在操纵（冻结，减慢或反转）时间并随意改变视点的同时观看动态场景。 通常，使用少量摄像机生成交互视点视频以捕获多个视频流。 采用多视图3D重建和消隐技术来创建视频帧的分层表示，使得能够实现捕获的动态场景的高效压缩和交互式回放，同时允许实时渲染。
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7.发明授权Real-time rendering system and process for interactive viewpoint video that was generated using overlapping images of a scene captured from viewpoints forming a grid 有权使用从形成网格的视点拍摄的场景的重叠图像生成的交互视点视频的实时渲染系统和处理公开(公告)号：US07142209B2
公开(公告)日：2006-11-28
申请号：US11097549
申请日：2005-03-31
IPC分类号： G06T15/20
CPC分类号： G06T15/205 , G09G5/14 , G09G2320/0261 , G09G2340/10
摘要： A system and process for rendering and displaying an interactive viewpoint video is presented in which a user can watch a dynamic scene while manipulating (freezing, slowing down, or reversing) time and changing the viewpoint at will. The ability to interactively control viewpoint while watching a video is an exciting new application for image-based rendering. Because any intermediate view can be synthesized at any time, with the potential for space-time manipulation, this type of video has been dubbed interactive viewpoint video.
摘要翻译： 呈现用于呈现和显示交互式视点视频的系统和过程，其中用户可以在操纵（冻结，减速或反转）时间并随意改变视点的同时观看动态场景。 在观看视频时交互控制视点的能力是基于图像的渲染的令人兴奋的新应用。 因为任何中间视图可以随时被合成，具有时空操纵的潜力，这种类型的视频被称为交互视点视频。
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公开(公告)号：US07286143B2
公开(公告)日：2007-10-23
申请号：US11097542
申请日：2005-03-31
IPC分类号： G09G5/00
CPC分类号： H04N5/2627 , G06T7/557 , G06T7/596 , G06T15/205 , G06T2207/10021
摘要： A system and process for generating, and then rendering and displaying, an interactive viewpoint video in which a user can watch a dynamic scene while manipulating (freezing, slowing down, or reversing) time and changing the viewpoint at will. In general, the interactive viewpoint video is generated using a small number of cameras to capture multiple video streams. A multi-view 3D reconstruction and matting technique is employed to create a layered representation of the video frames that enables both efficient compression and interactive playback of the captured dynamic scene, while at the same time allowing for real-time rendering.
摘要翻译： 一种用于生成并再现和显示交互视点视频的系统和过程，其中用户可以在操纵（冻结，减慢或反转）时间并随意改变视点的同时观看动态场景。 通常，使用少量摄像机生成交互视点视频以捕获多个视频流。 采用多视图3D重建和消隐技术来创建视频帧的分层表示，使得能够实现捕获的动态场景的高效压缩和交互式回放，同时允许实时渲染。
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9.发明授权公开(公告)号：US07206000B2
公开(公告)日：2007-04-17
申请号：US11334591
申请日：2006-01-17
IPC分类号： G09G5/02
CPC分类号： G06T15/205
摘要： A system and process for generating a two-layer, 3D representation of a digital or digitized image from the image and a pixel disparity map of the image is presented. The two layer representation includes a main layer having pixels exhibiting background colors and background disparities associated with correspondingly located pixels of depth discontinuity areas in the image, as well as pixels exhibiting colors and disparities associated with correspondingly located pixels of the image not found in these depth discontinuity areas. The other layer is a boundary layer made up of pixels exhibiting foreground colors, foreground disparities and alpha values associated with the correspondingly located pixels of the depth discontinuity areas. The depth discontinuity areas correspond to prescribed sized areas surrounding depth discontinuities found in the image using a disparity map thereof.
摘要翻译： 提出了一种用于从图像生成数字或数字化图像的二层3D表示和图像的像素视差图的系统和过程。 两层表示包括具有显示背景颜色的像素和与图像中的深度不连续区域的相应定位的像素相关联的背景差异的主层以及与在这些深度中未找到的图像的相应定位的像素相关联的颜色和差异的像素 不连续区域。 另一层是由与前述深度不连续区域的对应位置的像素相关联的前景色，前景差异和α值的像素构成的边界层。 深度不连续区域对应于使用其视差图在图像中发现的围绕深度不连续性的规定尺寸的区域。
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公开(公告)号：US07382931B2
公开(公告)日：2008-06-03
申请号：US11036944
申请日：2005-01-14
IPC分类号： G06K9/40
CPC分类号： H04N5/2355 , G06T5/50 , H04N5/235 , H04N5/2352 , H04N5/77 , H04N5/781 , H04N5/85
摘要： A system and process for generating High Dynamic Range (HDR) video is presented which involves first capturing a video image sequence while varying the exposure so as to alternate between frames having a shorter and longer exposure. The exposure for each frame is set prior to it being captured as a function of the pixel brightness distribution in preceding frames. Next, for each frame of the video, the corresponding pixels between the frame under consideration and both preceding and subsequent frames are identified. For each corresponding pixel set, at least one pixel is identified as representing a trustworthy pixel. The pixel color information associated with the trustworthy pixels is then employed to compute a radiance value for each pixel set to form a radiance map. A tone mapping procedure can then be performed to convert the radiance map into an 8-bit representation of the HDR frame.
摘要翻译： 提出了用于产生高动态范围（HDR）视频的系统和过程，其涉及首先在改变曝光的同时捕获视频图像序列，以便在具有较短和较长曝光的帧之间交替。 每个帧的曝光在其被捕获之前被设置为在先前帧中的像素亮度分布的函数。 接下来，对于视频的每个帧，识别所考虑的帧与前后帧之间的对应像素。 对于每个对应的像素集合，至少一个像素被识别为表示可靠的像素。 然后使用与可信赖像素相关联的像素颜色信息来计算每个像素组的辐射值以形成辐射图。 然后可以执行色调映射过程以将辐射图转换成HDR帧的8位表示。
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