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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

US07557807B2 Visual simulation of weathering by y-ton tracing 失效
标题翻译：通过y-ton跟踪进行风化的视觉模拟
公开(公告)号：US07557807B2
公开(公告)日：2009-07-07
申请号：US11174439
申请日：2005-07-01
申请人： Yanyun Chen , Xin Tong , Baining Guo , Heung-Yeung Shum
发明人： Yanyun Chen , Xin Tong , Baining Guo , Heung-Yeung Shum
IPC分类号： G06T15/70
CPC分类号： G06F17/5009 , G06F2217/10
摘要： An exemplary computer-implementable method includes providing a computer-generated object wherein the object has characteristics, emitting a computer-generated particle, determining if the particle interacts with the object and, if the particle interacts with the object, altering one or more of the characteristic of the object wherein the altering simulates weathering or aging of the object. Various other exemplary techniques are also disclosed.
摘要翻译：示例性的可计算机可实现的方法包括提供计算机生成的对象，其中对象具有特征，发射计算机生成的粒子，确定粒子是否与对象相互作用，以及如果粒子与对象相互作用，则改变一个或多个其特征在于，其中改变模拟物体的风化或老化。还公开了各种其它示例性技术。

8. 发明申请

US20070247472A1 CAPTURING AND RENDERING GEOMETRIC DETAILS 有权
标题翻译：捕获和渲染几何细节
公开(公告)号：US20070247472A1
公开(公告)日：2007-10-25
申请号：US11277938
申请日：2006-03-29
申请人： Xin Tong , Yanyun Chen , Baining Guo , Heung-Yeung Shum , Jiaping Wang , John Snyder
发明人： Xin Tong , Yanyun Chen , Baining Guo , Heung-Yeung Shum , Jiaping Wang , John Snyder
IPC分类号： G09G5/00
CPC分类号： G01B11/24 , G01S17/89 , G06T15/04
摘要： A method and system for implementing capturing and rendering geometric details for mesostructure surfaces is described herein. A mesostructure distance function is defined as a function of a given reference point and a given viewing direction. A distance from a reference point to a mesostructure surface point along a viewing direction is measured using the mesostructure distance function. This distance is used to determine the visibility of mesostructure surface for rendering silhouettes. The lighting visibility of the mesostructure surface point may also be determined and used for determining whether the mesostructure surface point is in shadow. This determination may then be used for rendering shadow silhouettes.
摘要翻译：本文描述了一种用于实现用于介观结构表面的捕获和渲染几何细节的方法和系统。介观结构距离函数被定义为给定参考点和给定观察方向的函数。使用介观结构距离函数测量从参考点到观察方向的介观结构表面点的距离。该距离用于确定用于渲染轮廓的介观结构表面的可见性。也可以确定介观结构表面点的照明可见度，并用于确定介观结构表面点是否处于阴影。然后可以将该确定用于渲染阴影剪影。

9. 发明授权

US07042456B2 Modeling and rendering of realistic feathers 失效
标题翻译：真实羽毛的建模和渲染
公开(公告)号：US07042456B2
公开(公告)日：2006-05-09
申请号：US10623425
申请日：2003-07-18
申请人： Yanyun Chen , Baining Guo , Ying-Qing Xu , Heung-Yeung Shum
发明人： Yanyun Chen , Baining Guo , Ying-Qing Xu , Heung-Yeung Shum
IPC分类号： G09G5/00 , G06F15/167
CPC分类号： G06T17/20 , G06T15/10
摘要： The present invention provides a systematic method for rendering feathers. In one aspect, a segment of a rachis having a first barb and second barb is generated. The first barb is generated based on a first barb length and the second barb is generated based on a second barb length.
摘要翻译：本发明提供了一种用于渲染羽毛的系统方法。在一个方面，产生具有第一倒钩和第二倒钩的轴的段。基于第一倒钩长度产生第一倒钩，并且基于第二倒钩长度产生第二倒钩。

10. 发明申请

US20060028468A1 Shell texture functions 失效
标题翻译： Shell纹理功能
公开(公告)号：US20060028468A1
公开(公告)日：2006-02-09
申请号：US10898435
申请日：2004-07-23
申请人： Yanyun Chen , Xin Tong , Stephen Lin , Baining Guo , Heung-Yeung Shum
发明人： Yanyun Chen , Xin Tong , Stephen 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。

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