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1. 发明授权

US07884820B2 Interactive relighting with dynamic reflectance 有权
标题翻译：具有动态反射率的交互式重视
公开(公告)号：US07884820B2
公开(公告)日：2011-02-08
申请号：US11764062
申请日：2007-06-15
申请人： Kun Zhou , Yanyun Chen , Stephen S. Lin , Baining Guo
发明人： Kun Zhou , Yanyun Chen , Stephen S. Lin , Baining Guo
IPC分类号： G06T15/00
CPC分类号： G06T15/506
摘要： Interactive relighting with dynamic reflectance involves relighting a graphical scene with dynamic changes to the reflectance(s) in the graphical scene. A graphical scene may include source radiance, regions having reflectances, a surface spot, incident radiation from the source radiance at the surface sport, an incident direction, a viewing direction, exit radiance, and so forth. In an example embodiment, a graphical scene is relighted based on at least one adjusted reflectance of the graphical scene using an incident radiance at a surface spot that is separated into respective incident radiance components corresponding to different respective numbers of interreflections in the graphical scene. In another example embodiment, a graphical scene is relighted based on at least one adjusted reflectance of the graphical scene using a tensor representation for a reflectance of a surface spot with the tensor representation being segmented into three adjustable factors for lighting, viewing, and reflectance.
摘要翻译：具有动态反射率的交互式重视包括使图形场景与图形场景中的反射率的动态变化相关联。图形场景可以包括源辐射，具有反射率的区域，表面斑点，来自表面运动处的源辐射的入射辐射，入射方向，观察方向，出射辐射度等。在示例性实施例中，基于图形场景的至少一个经调整的反射率使用在表面点处的入射辐射被分离成对应于图形场景中的不同相应数目的反射的相应入射辐射分量的图形场景被重新点亮。在另一个示例性实施例中，基于使用张量表示的图形场景的至少一个经调整的反射率对表面点的反射率进行重新绘图，其中张量表示被分割成用于照明，观看和反射的三个可调节因子。

2. 发明申请

US20080309667A1 Interactive Relighting with Dynamic Reflectance 有权
标题翻译：与动态反射相互作用
公开(公告)号：US20080309667A1
公开(公告)日：2008-12-18
申请号：US11764062
申请日：2007-06-15
申请人： Kun Zhou , Yanyun Chen , Stephen S. Lin , Baining Guo
发明人： Kun Zhou , Yanyun Chen , Stephen S. Lin , Baining Guo
IPC分类号： G06T15/50
CPC分类号： G06T15/506
摘要： Interactive relighting with dynamic reflectance involves relighting a graphical scene with dynamic changes to the reflectance(s) in the graphical scene. A graphical scene may include source radiance, regions having reflectances, a surface spot, incident radiation from the source radiance at the surface sport, an incident direction, a viewing direction, exit radiance, and so forth. In an example embodiment, a graphical scene is relighted based on at least one adjusted reflectance of the graphical scene using an incident radiance at a surface spot that is separated into respective incident radiance components corresponding to different respective numbers of interreflections in the graphical scene. In another example embodiment, a graphical scene is relighted based on at least one adjusted reflectance of the graphical scene using a tensor representation for a reflectance of a surface spot with the tensor representation being segmented into three adjustable factors for lighting, viewing, and reflectance.
摘要翻译：具有动态反射率的交互式重视包括使图形场景与图形场景中的反射率的动态变化相关联。图形场景可以包括源辐射，具有反射率的区域，表面斑点，来自表面运动处的源辐射的入射辐射，入射方向，观察方向，出射辐射度等。在示例性实施例中，基于图形场景的至少一个经调整的反射率使用在表面点处的入射辐射被分离成对应于图形场景中的不同相应数目的反射的相应入射辐射分量的图形场景被重新点亮。在另一个示例性实施例中，基于使用张量表示的图形场景的至少一个经调整的反射率对表面点的反射率进行重新绘图，其中张量表示被分割成用于照明，观看和反射的三个可调节因子。

3. 发明授权

US07129944B2 Macrostructure modeling with microstructure reflectance slices 有权
公开(公告)号：US07129944B2
公开(公告)日：2006-10-31
申请号：US11000607
申请日：2004-12-01
申请人： Baining Guo , Stephen S. Lin , Heung-Yeung Shum , Ying-Qing Xu , Yanyun Chen
发明人： Baining Guo , Stephen S. Lin , Heung-Yeung Shum , Ying-Qing Xu , Yanyun Chen
IPC分类号： G06T15/60
CPC分类号： G06T15/50 , G06T15/00 , G06T17/00 , G06T2210/16 , G06T2210/62
摘要： A method and system for efficient synthesis of photorealistic free-form knitwear, where a single cross-section of yarn serves as the basic primitive for modeling entire articles of knitwear. This primitive, called the lumislice, describes radiance from a yarn cross-section based on fine-level interactions, including occlusion, shadowing, and multiple scattering, among yarn fibers. By representing yarn as a sequence of identical but rotated cross-sections, the lumislice can effectively propagate local microstructure over arbitrary stitch patterns and knitwear shapes. This framework accommodates varying levels of detail and capitalizes on hardware-assisted transparency blending. To further enhance realism, a technique for generating soft shadows from yarn is also introduced.

4. 发明授权

US07167177B2 Macrostructure modeling with microstructure reflectance slices 有权
标题翻译：微结构反射切片的宏观结构建模
公开(公告)号：US07167177B2
公开(公告)日：2007-01-23
申请号：US11064927
申请日：2005-02-24
申请人： Baining Guo , Stephen S. Lin , Heung-Yeung Shum , Ying-Qing Xu , Yanyun Chen
发明人： Baining Guo , Stephen S. Lin , Heung-Yeung Shum , Ying-Qing Xu , Yanyun Chen
IPC分类号： G06T15/60
CPC分类号： G06T15/50 , G06T15/00 , G06T17/00 , G06T2210/16 , G06T2210/62
摘要： A method and system for efficient synthesis of photorealistic free-form knitwear, where a single cross-section of yarn serves as the basic primitive for modeling entire articles of knitwear. This primitive, called the lumislice, describes radiance from a yarn cross-section based on fine-level interactions, including occlusion, shadowing, and multiple scattering, among yarn fibers. By representing yarn as a sequence of identical but rotated cross-sections, the lumislice can effectively propagate local microstructure over arbitrary stitch patterns and knitwear shapes. This framework accommodates varying levels of detail and capitalizes on hardware-assisted transparency blending. To further enhance realism, a technique for generating soft shadows from yarn is also introduced.
摘要翻译：一种用于高效合成照片写实自由形式针织品的方法和系统，其中单个横截面的纱线用作对整个针织品的造型进行建模的基本原理。这种原始的，称为lumislice，描述了纱线横截面基于精细水平相互作用（包括闭合，遮蔽和多重散射）在纱线纤维之间的辐射。通过将纱线表示为相同但旋转的横截面的序列，光栅可以有效地将局部微结构传播到任意针迹图案和针织品形状上。该框架适应不同程度的细节，并利用硬件辅助的透明度混合。为了进一步增强现实主义，还引入了从纱线产生柔和阴影的技术。

5. 发明授权

US07327365B2 Shell texture functions 失效
标题翻译： Shell纹理功能
公开(公告)号：US07327365B2
公开(公告)日：2008-02-05
申请号：US10898435
申请日：2004-07-23
申请人： Yanyun Chen , Xin Tong , Stephen S. Lin , Baining Guo , Heung-Yeung Shum
发明人： Yanyun Chen , Xin Tong , Stephen S. Lin , Baining Guo , Heung-Yeung Shum
IPC分类号： G06T17/00
CPC分类号： G06T15/04
摘要： Techniques are provided for at least modeling any one of mesostructure shadowing, masking, interreflection and silhouettes on a surface, as well as subsurface scattering within a non-homogeneous volume. Such techniques include, at least, acquiring material parameters for a material sample, determining irradiance distribution values for the material sample, synthesizing the material sample onto a mesh of an object. The synthesized object may then be rendered by one of plural rendering techniques.
摘要翻译：提供技术用于至少建模表面上的任何一种介观结构阴影，掩模，反射和剪影，以及非均匀体积内的地下散射。这些技术至少包括获取材料样品的材料参数，确定材料样品的辐照度分布值，将材料样品合成到物体的网格上。然后可以通过多个渲染技术之一来呈现合成对象。

6. 发明授权

US07538766B2 Pre-computed shadow fields 失效
标题翻译：预计算阴影场
公开(公告)号：US07538766B2
公开(公告)日：2009-05-26
申请号：US11147921
申请日：2005-06-08
申请人： Kun Zhou , Yaohua Hu , Stephen S. Lin , Baining Guo , Heung-Yeung Shum
发明人： Kun Zhou , Yaohua Hu , Stephen S. Lin , Baining Guo , Heung-Yeung Shum
IPC分类号： G06T15/00
CPC分类号： G06T15/60
摘要： Pre-computed shadow fields are described. In one aspect, shadow fields for multiple entities are pre-computed. The shadow fields are pre-computed independent of scene configuration. The multiple entities include at least one occluding object and at least one light source. A pre-computed shadow field for a light source indicates radiance from the light source. A pre-computed shadow field for an occluding object indicates occlusion of radiance from the at least one light source.
摘要翻译：描述预先计算的阴影场。在一个方面，多个实体的影子字段被预先计算。阴影场是独立于场景配置预先计算的。多个实体包括至少一个闭塞对象和至少一个光源。用于光源的预计算阴影场指示来自光源的辐射。用于闭塞物体的预计算阴影场表示遮挡来自至少一个光源的辐射。

7. 发明授权

US08243071B2 Modeling and rendering of heterogeneous translucent materials using the diffusion equation 有权
标题翻译：使用扩散方程建模和渲染异质半透明材料
公开(公告)号：US08243071B2
公开(公告)日：2012-08-14
申请号：US12072925
申请日：2008-02-29
申请人： Jiaping Wang , Xin Tong , Stephen S. Lin , Baining Guo , Heung-Yeung Shum , Zhouchen Lin
发明人： Jiaping Wang , Xin Tong , Stephen S. Lin , Baining Guo , Heung-Yeung Shum , Zhouchen Lin
IPC分类号： G06T15/00 , G06T15/60 , G06K9/00
CPC分类号： G06T15/506 , G01N21/47 , G01N21/4738 , G06T15/50
摘要： An exemplary method includes providing image data for an illuminated physical sample of a heterogeneous translucent material, determining one or more material properties of the material based in part on a diffusion equation where one of the material properties is a diffusion coefficient for diffusion of radiation in the material and where the determining includes a regularization term for the diffusion coefficient, mapping the one or more material properties to a virtual object volume, assigning virtual illumination conditions to the virtual object volume, and rendering the virtual object volume using the virtual illumination conditions as a boundary condition for a system of diffusion equations of the virtual object volume. Other methods, devices and systems are also disclosed.
摘要翻译：一种示例性方法包括提供用于异质半透明材料的照明物理样品的图像数据，部分地基于扩散方程来确定材料的一种或多种材料性质，其中材料性质之一是用于辐射的扩散的扩散系数材料，并且其中确定包括扩散系数的正则化术语，将一个或多个材料属性映射到虚拟对象体积，将虚拟照明条件分配给虚拟对象体积，以及使用虚拟照明条件将虚拟对象体积呈现为虚拟物体体积扩散方程组的边界条件。还公开了其它方法，装置和系统。

8. 发明授权

US08922556B2 Line space gathering for single scattering in large scenes 有权
标题翻译：在大场景中单线散射的线空间聚集
公开(公告)号：US08922556B2
公开(公告)日：2014-12-30
申请号：US13089122
申请日：2011-04-18
申请人： Sun Xin , Stephen S. Lin , Baining Guo
发明人： Sun Xin , Stephen S. Lin , Baining Guo
IPC分类号： G06T15/50 , G06T15/06
CPC分类号： G06T15/06 , G06T15/506
摘要： A light gathering process may reduce the computational resources and storage required to render a scene with a participating homogeneous media. According to some implementations, Efficiency may be obtained by evaluating the final radiance along a viewing ray directly from the lighting rays passing near to it, and by rapidly identifying such lighting rays in the scene. To facilitate a search for nearby lighting rays, the lighting rays and viewing rays may be represented as a 6D point and a plane according to the corresponding Plucker coordinates and coefficients, respectively.
摘要翻译：光采集过程可以减少使用参与的均匀介质渲染场景所需的计算资源和存储空间。根据一些实施方式，可以通过直接从通过其附近的照明光线直接观察沿着观察光线的最终辐射，以及通过快速识别场景中的这种照明光线来获得效率。为了便于搜索附近的照明光线，照明光线和观察光线可以分别根据相应的Plucker坐标和系数表示为6D点和平面。

9. 发明授权

US07463769B2 Radiometric calibration from a single image 有权
标题翻译：单个图像的辐射校准
公开(公告)号：US07463769B2
公开(公告)日：2008-12-09
申请号：US11156988
申请日：2005-06-20
申请人： Stephen S. Lin , Baining Guo , Heung-Yeung Shum , Jinwei Gu
发明人： Stephen S. Lin , Baining Guo , Heung-Yeung Shum , Jinwei Gu
IPC分类号： G06K9/00
CPC分类号： H04N1/603 , G06T7/80 , G06T7/90
摘要： Radiometric calibration of an image capture device (e.g., a digital camera) using a single image is described. The single image may be a color image or a grayscale image. The calibration identifies and analyzes edge pixels of the image that correspond to an edge between two colors or grayscale levels of a scene. Intensity distributions of intensities measured from the single image are then analyzed. An inverse response function for the image capture device is determined based on the intensity distributions. For a color image, the radiometric calibration involves calculating an inverse response function that maps measured blended colors of edge pixels and the associated measured component colors into linear distributions. For a grayscale image, the radiometric calibration involves deriving an inverse response function that maps non-uniform histograms of measured intensities into uniform distributions of calibrated intensities.
摘要翻译：描述使用单个图像的图像捕获装置（例如，数码相机）的放射线校准。单个图像可以是彩色图像或灰度图像。校准识别和分析与场景的两种颜色或灰度级之间的边缘对应的图像的边缘像素。然后分析从单个图像测量的强度的强度分布。基于强度分布确定图像捕获装置的反应响应函数。对于彩色图像，辐射校准包括计算反向响应函数，其将边缘像素的测量混合颜色和相关联的测量分量颜色映射为线性分布。对于灰度图像，辐射校准涉及导出将测得的强度的不均匀直方图映射到校准强度的均匀分布的逆响应函数。

10. 发明授权

US07986830B2 Radiometric calibration from a single image 有权
标题翻译：单个图像的辐射校准
公开(公告)号：US07986830B2
公开(公告)日：2011-07-26
申请号：US12327680
申请日：2008-12-03
申请人： Stephen S. Lin , Baining Guo , Heung-Yeung Shum , Jinwei Gu
发明人： Stephen S. Lin , Baining Guo , Heung-Yeung Shum , Jinwei Gu
IPC分类号： G06K9/00
CPC分类号： H04N1/603 , G06T7/80 , G06T7/90
摘要： Radiometric calibration of an image capture device (e.g., a digital camera) using a single image is described. The single image may be a color image or a grayscale image. The calibration identifies and analyzes edge pixels of the image that correspond to an edge between two colors or grayscale levels of a scene. Intensity distributions of intensities measured from the single image are then analyzed. An inverse response function for the image capture device is determined based on the intensity distributions. For a color image, the radiometric calibration involves calculating an inverse response function that maps measured blended colors of edge pixels and the associated measured component colors into linear distributions. For a grayscale image, the radiometric calibration involves deriving an inverse response function that maps non-uniform histograms of measured intensities into uniform distributions of calibrated intensities.
摘要翻译：描述使用单个图像的图像捕获装置（例如，数码相机）的放射线校准。单个图像可以是彩色图像或灰度图像。校准识别和分析与场景的两种颜色或灰度级之间的边缘对应的图像的边缘像素。然后分析从单个图像测量的强度的强度分布。基于强度分布确定图像捕获装置的反应响应函数。对于彩色图像，辐射校准包括计算反向响应函数，其将边缘像素的测量混合颜色和相关联的测量分量颜色映射为线性分布。对于灰度图像，辐射校准涉及导出将测得的强度的非均匀直方图映射到校准强度的均匀分布的反向响应函数。

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