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31. 发明授权

US09098945B2 Modeling anisotropic surface reflectance with microfacet synthesis 有权
标题翻译：用微量合成法建模各向异性表面反射
公开(公告)号：US09098945B2
公开(公告)日：2015-08-04
申请号：US12433910
申请日：2009-05-01
申请人： Jiaping Wang , Shuang Zhao , Xin Tong , John M. Snyder , Baining Guo
发明人： Jiaping Wang , Shuang Zhao , Xin Tong , John M. Snyder , Baining Guo
IPC分类号： G06T15/50
CPC分类号： G06T15/506
摘要： Described is a search technology in which spatially varying anisotropic reflectance is modeled using image data captured from a single view. Reflectance at each point is represented using a microfacet-based Bidirectional Reflectance Distribution Function (BRDF). Modeling processes the image data, which provides a partial normal distribution function (NDF) for each surface point. The NDF at each selected point is completed by texture synthesis using similar, overlapping partial NDFs from other points. Also described is a scanning device that illuminates a sample surface from a two-dimensional set of light directions using a linear array of LEDs moved over a flat sample.
摘要翻译：描述了一种搜索技术，其中使用从单个视图捕获的图像数据来建模空间变化的各向异性反射率。每个点的反射率使用基于微量的基于双向反射分布函数（BRDF）表示。建模处理图像数据，为每个表面点提供部分正态分布函数（NDF）。每个选定点的NDF通过纹理合成完成，使用与其他点相似的，重叠的部分NDF。还描述了使用在扁平样品上移动的LED的线性阵列从二维光方向照射样品表面的扫描装置。

32. 发明授权

US07885469B2 Encoded high dynamic range textures 有权
标题翻译：编码高动态范围纹理
公开(公告)号：US07885469B2
公开(公告)日：2011-02-08
申请号：US11419697
申请日：2006-05-22
申请人： Xi Wang , Peter-Pike J. Sloan , Li-Yi Wei , Xin Tong , Baining Guo
发明人： Xi Wang , Peter-Pike J. Sloan , Li-Yi Wei , Xin Tong , Baining Guo
IPC分类号： G06K9/36
CPC分类号： H04N19/124 , H04N19/186 , H04N19/98
摘要： Encoded HDR textures are described. In one aspect, a HDR image comprised is preprocessed such that HDR information is represented in a single color channel. The preprocessed image is quantized in view of two luminance ranges to retain HDR in the single color channel. Each block of quantized channel information is then encoded across two textures (encoded HDR textures). Specifically, when encoding a block of the quantized information, pixels in a first range of the two luminance ranges are put into a color channel associated with a first texture. Additionally, pixels in a second range of the two luminance ranges are stored into a color channel associated with a second texture.
摘要翻译：描述编码的HDR纹理。在一个方面，包括的HDR图像被预处理，使得HDR信息被表示在单个颜色通道中。考虑到两个亮度范围来量化预处理图像，以将HDR保留在单色通道中。然后每个块的量化信道信息被编码在两个纹理（编码的HDR纹理）之间。具体地，当对量化信息的块进行编码时，将两个亮度范围的第一范围中的像素放入与第一纹理相关联的颜色通道中。此外，两个亮度范围的第二范围中的像素被存储到与第二纹理相关联的颜色通道中。

33. 发明授权

US07412362B2 River modeling 有权
标题翻译：河流建模
公开(公告)号：US07412362B2
公开(公告)日：2008-08-12
申请号：US11132166
申请日：2005-05-18
申请人： Yaohua Hu , Chen Li , Baining Guo , Bruno Silva , Alex Pfaffe , Xin Tong , Gang Chen , Hongbo Jiang
发明人： Yaohua Hu , Chen Li , Baining Guo , Bruno Silva , Alex Pfaffe , Xin Tong , Gang Chen , Hongbo Jiang
IPC分类号： G06F17/50 , G06T15/00
CPC分类号： G06F17/5009 , G06F2217/16 , G06T13/60 , G06T15/04
摘要： Systems and methods are presented for real-time realistic river modeling. In one implementation, when provided with the physical features of a modeled terrain, the systems and methods described herein automatically determine a watercourse route in relation to the terrain and calculate river borders. The systems and methods then calculate a surface structure for the river between the borders and map texture coordinates to the surface structure. The systems and methods apply textures at the texture coordinates to provide an animated, view-dependent representation of wave geometries for the modeled water surface including reflection, refraction, and Fresnel effects.
摘要翻译：提出了实时现实河流建模的系统和方法。在一个实施方案中，当被提供有建模地形的物理特征时，本文所述的系统和方法自动地确定与地形相关的水道路线并计算河流边界。系统和方法然后计算边界之间的河流的表面结构，并将纹理坐标映射到表面结构。系统和方法在纹理坐标处应用纹理以提供用于建模水面的波形几何的动画，视图相关表示，包括反射，折射和菲涅尔效应。

34. 发明授权

US08953037B2 Obtaining spatially varying bidirectional reflectance distribution function 有权
标题翻译：获得空间变化的双向反射分布函数
公开(公告)号：US08953037B2
公开(公告)日：2015-02-10
申请号：US13274191
申请日：2011-10-14
申请人： Jiaping Wang , Baining Guo , Peiran Ren , John Michael Snyder , Xin Tong
发明人： Jiaping Wang , Baining Guo , Peiran Ren , John Michael Snyder , Xin Tong
IPC分类号： H04N9/47 , H04N1/00 , G01N21/55
CPC分类号： H04N1/00018 , G01N21/55 , H04N1/00013 , H04N1/00045 , H04N1/00087
摘要： A system for reflectance acquisition of a target includes a light source, an image capture device, and a reflectance reference chart. The reflectance reference chart is fixed relative to the target. The light source provides a uniform band of light across at least a dimension of the target. The image capture device is configured and positioned to encompass at least a portion of the target and at least a portion of the reflectance reference chart within a field-of-view of the image capture device. The image capture device captures a sequence of images of the target and the reflectance reference chart during a scan thereof. Reflectance responses are calculated for the pixels in the sequence of images. Reference reflectance response distribution functions are matched to the calculated reflectance responses, and an image of the target is reconstructed based at least in part on the matched reference reflectance response distribution functions.
摘要翻译：用于目标的反射获取的系统包括光源，图像捕获装置和反射率参考图。反射率参考图表相对于目标是固定的。光源在目标的至少一维上提供均匀的光束。图像捕获设备被配置和定位成在图像捕获设备的视野内包围目标的至少一部分和反射参考图的至少一部分。图像捕获装置在其扫描期间捕获目标的图像序列和反射率参考图。针对图像序列中的像素计算反射响应。参考反射响应分布函数与所计算的反射率响应匹配，并且至少部分地基于匹配的参考反射响应分布函数来重建目标的图像。

35. 发明授权

US08570522B2 Capturing reflected light from a sampling surface 有权
标题翻译：从采样表面捕获反射光
公开(公告)号：US08570522B2
公开(公告)日：2013-10-29
申请号：US13538558
申请日：2012-06-29
申请人： Jiaping Wang , Moshe Benezra , Xin Tong , John Michael Snyder , Baining Guo
发明人： Jiaping Wang , Moshe Benezra , Xin Tong , John Michael Snyder , Baining Guo
IPC分类号： G01N21/55
CPC分类号： G01N21/55
摘要： A mechanism is disclosed for capturing reflected rays from a surface. A first and second lens aligned along a same optical center axis are configured so that a beam of light collimated parallel to the lens center axis directed to a first side, is converged toward the lens center axis on a second side. A first light beam source between the first and second lenses directs a light beam toward the first lens parallel to the optical center axis. Second light beam source(s) on the second side of the first lens, direct a light beam toward a focal plane of the first lens at a desired angle. An image capturing component, at the second side of the second lens, has an image capture surface directed toward the second lens to capture images of the light reflected from a sample capture surface at the focal plane of the first lens.
摘要翻译：公开了用于从表面捕获反射光线的机构。沿着相同的光学中心轴对准的第一和第二透镜被配置为使得平行于指向第一侧的透镜中心轴准直的光束在第二侧上朝向透镜中心轴会聚。第一和第二透镜之间的第一光束源将平行于光学中心轴的光束朝着第一透镜引导。在第一透镜的第二侧上的第二光束源将光束以期望的角度引导到第一透镜的焦平面。在第二透镜的第二侧的图像捕获部件具有指向第二透镜的图像捕获表面，以捕获在第一透镜的焦平面处从样品捕获表面反射的光的图像。

36. 发明申请

US20120268637A1 CAPTURING REFLECTED LIGHT FROM A SAMPLING SURFACE 有权
标题翻译：从采样表面捕获反射光
公开(公告)号：US20120268637A1
公开(公告)日：2012-10-25
申请号：US13538558
申请日：2012-06-29
申请人： Jiaping Wang , Moshe Benezra , Xin Tong , John Michael Snyder , Baining Guo
发明人： Jiaping Wang , Moshe Benezra , Xin Tong , John Michael Snyder , Baining Guo
IPC分类号： G02B13/16 , H04N5/225 , H04N5/335
CPC分类号： G01N21/55
摘要： A mechanism is disclosed for capturing reflected rays from a surface. A first and second lens aligned along a same optical center axis are configured so that a beam of light collimated parallel to the lens center axis directed to a first side, is converged toward the lens center axis on a second side. A first light beam source between the first and second lenses directs a light beam toward the first lens parallel to the optical center axis. Second light beam source(s) on the second side of the first lens, direct a light beam toward a focal plane of the first lens at a desired angle. An image capturing component, at the second side of the second lens, has an image capture surface directed toward the second lens to capture images of the light reflected from a sample capture surface at the focal plane of the first lens.
摘要翻译：公开了用于从表面捕获反射光线的机构。沿着相同的光学中心轴对准的第一和第二透镜被配置为使得平行于指向第一侧的透镜中心轴准直的光束在第二侧上朝向透镜中心轴会聚。第一和第二透镜之间的第一光束源将平行于光学中心轴的光束朝着第一透镜引导。在第一透镜的第二侧上的第二光束源将光束以期望的角度引导到第一透镜的焦平面。在第二透镜的第二侧的图像捕获部件具有指向第二透镜的图像捕获表面，以捕获在第一透镜的焦平面处从样品捕获表面反射的光的图像。

37. 发明申请

US20070269115A1 Encoded High Dynamic Range Textures 有权
标题翻译：编码高动态范围纹理
公开(公告)号：US20070269115A1
公开(公告)日：2007-11-22
申请号：US11419697
申请日：2006-05-22
申请人： Xi Wang , Peter-Pike J. Sloan , Li-Yi Wei , Xin Tong , Baining Guo
发明人： Xi Wang , Peter-Pike J. Sloan , Li-Yi Wei , Xin Tong , Baining Guo
IPC分类号： G06K9/36
CPC分类号： H04N19/124 , H04N19/186 , H04N19/98
摘要： Encoded HDR textures are described. In one aspect, a HDR image comprised is preprocessed such that HDR information is represented in a single color channel. The preprocessed image is quantized in view of two luminance ranges to retain HDR in the single color channel. Each block of quantized channel information is then encoded across two textures (encoded HDR textures). Specifically, when encoding a block of the quantized information, pixels in a first range of the two luminance ranges are put into a color channel associated with a first texture. Additionally, pixels in a second range of the two luminance ranges are stored into a color channel associated with a second texture.
摘要翻译：描述编码的HDR纹理。在一个方面，包括的HDR图像被预处理，使得HDR信息被表示在单个颜色通道中。考虑到两个亮度范围来量化预处理图像，以将HDR保留在单色通道中。然后每个块的量化信道信息被编码在两个纹理（编码的HDR纹理）之间。具体地，当对量化信息的块进行编码时，将两个亮度范围的第一范围中的像素放入与第一纹理相关联的颜色通道中。此外，两个亮度范围的第二范围中的像素被存储到与第二纹理相关联的颜色通道中。

38. 发明申请

US20130093883A1 Obtaining Spatially Varying Bidirectional Reflectance Distribution Function 有权
标题翻译：获得空间变化的双向反射分布函数
公开(公告)号：US20130093883A1
公开(公告)日：2013-04-18
申请号：US13274191
申请日：2011-10-14
申请人： Jiaping Wang , Baining Guo , Peiran Ren , John Michael Snyder , Xin Tong
发明人： Jiaping Wang , Baining Guo , Peiran Ren , John Michael Snyder , Xin Tong
IPC分类号： H04N7/18
CPC分类号： H04N1/00018 , G01N21/55 , H04N1/00013 , H04N1/00045 , H04N1/00087
摘要： A system for reflectance acquisition of a target includes a light source, an image capture device, and a reflectance reference chart. The reflectance reference chart is fixed relative to the target. The light source provides a uniform band of light across at least a dimension of the target. The image capture device is configured and positioned to encompass at least a portion of the target and at least a portion of the reflectance reference chart within a field-of-view of the image capture device. The image capture device captures a sequence of images of the target and the reflectance reference chart during a scan thereof. Reflectance responses are calculated for the pixels in the sequence of images. Reference reflectance response distribution functions are matched to the calculated reflectance responses, and an image of the target is reconstructed based at least in part on the matched reference reflectance response distribution functions.
摘要翻译：用于目标的反射获取的系统包括光源，图像捕获装置和反射率参考图。反射率参考图表相对于目标是固定的。光源在目标的至少一维上提供均匀的光束。图像捕获设备被配置和定位成在图像捕获设备的视野内包围目标的至少一部分和反射参考图的至少一部分。图像捕获装置在其扫描期间捕获目标的图像序列和反射率参考图。针对图像序列中的像素计算反射响应。参考反射响应分布函数与所计算的反射率响应匹配，并且至少部分地基于匹配的参考反射响应分布函数来重建目标的图像。

39. 发明授权

US08406556B2 Light transport reconstruction from sparsely captured images 有权
标题翻译：从稀疏捕获的图像的光传输重建
公开(公告)号：US08406556B2
公开(公告)日：2013-03-26
申请号：US12797859
申请日：2010-06-10
申请人： Jiaping Wang , Yue Dong , Xin Tong , Zhouchen Lin , Baining Guo
发明人： Jiaping Wang , Yue Dong , Xin Tong , Zhouchen Lin , Baining Guo
IPC分类号： G06K9/40
CPC分类号： G06T15/50
摘要： A “Scene Re-Lighter” provides various techniques for using an automatically reconstructed light transport matrix derived from a sparse sampling of images to provide various combinations of complex light transport effects in images, including caustics, complex occlusions, inter-reflections, subsurface scattering, etc. More specifically, the Scene Re-Lighter reconstructs the light transport matrix from a relatively small number of acquired images using a “Kernel Nyström” based technique adapted for low rank matrices constructed from sparsely sampled images. A “light transport kernel” is incorporated into the Nyström method to exploit nonlinear coherence in the light transport matrix. Further, an adaptive process is used to efficiently capture the sparsely sampled images from a scene. The Scene Re-Lighter is capable of achieving good reconstruction of the light transport matrix with only few hundred images to produce high quality relighting results. Further, the Scene Re-Lighter is also effective for modeling scenes with complex lighting effects and occlusions.
摘要翻译：场景再打火机提供了使用从图像稀疏采样得到的自动重建光传输矩阵的各种技术，以提供图像中复杂光传输效应的各种组合，包括焦散，复杂遮挡，相互反射，地下散射等。更具体地说，场景重新点亮器使用适用于由稀疏采样图像构成的低秩矩阵的基于内核Nyström的技术，从相对较少数量的获取图像重构光传输矩阵。光传输核被并入Nyström方法，以利用光传输矩阵中的非线性相干性。此外，使用自适应处理来有效地从场景捕获稀疏采样的图像。场景重新打火机能够通过仅仅几百张图像实现光传输矩阵的良好重建，从而产生高品质的重视效果。此外，场景重新打火机对于对具有复杂的照明效果和遮挡的场景进行建模也是有效的。

40. 发明授权

US08248613B2 Capturing reflected light from a sampling surface 有权
标题翻译：从采样表面捕获反射光
公开(公告)号：US08248613B2
公开(公告)日：2012-08-21
申请号：US12769974
申请日：2010-04-29
申请人： Jiaping Wang , Moshe Benezra , Xin Tong , John Michael Snyder , Baining Guo
发明人： Jiaping Wang , Moshe Benezra , Xin Tong , John Michael Snyder , Baining Guo
IPC分类号： G01N21/55
CPC分类号： G01N21/55
摘要： A mechanism is disclosed for capturing reflected rays from a surface. A first and second lens aligned along a same optical center axis are configured so that a beam of light collimated parallel to the lens center axis directed to a first side, is converged toward the lens center axis on a second side. A first light beam source between the first and second lenses directs a light beam toward the first lens parallel to the optical center axis. Second light beam source(s) on the second side of the first lens, direct a light beam toward a focal plane of the first lens at a desired angle. An image capturing component, at the second side of the second lens, has an image capture surface directed toward the second lens to capture images of the light reflected from a sample capture surface at the focal plane of the first lens.
摘要翻译：公开了用于从表面捕获反射光线的机构。沿着相同的光学中心轴对准的第一和第二透镜被配置为使得平行于指向第一侧的透镜中心轴准直的光束在第二侧上朝向透镜中心轴会聚。第一和第二透镜之间的第一光束源将平行于光学中心轴的光束朝着第一透镜引导。在第一透镜的第二侧上的第二光束源将光束以期望的角度引导到第一透镜的焦平面。在第二透镜的第二侧的图像捕获部件具有指向第二透镜的图像捕获表面，以捕获在第一透镜的焦平面处从样品捕获表面反射的光的图像。

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