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31. 发明授权

US08082129B2 Real-time rendering of light-scattering media 有权
公开(公告)号：US08082129B2
公开(公告)日：2011-12-20
申请号：US11830794
申请日：2007-07-30
申请人： Kun Zhou , Zhong Ren , Stephen Ssu-te Lin , Baining Guo , Heung-Yeung Shum
发明人： Kun Zhou , Zhong Ren , Stephen Ssu-te Lin , Baining Guo , Heung-Yeung Shum
IPC分类号： G06F17/10
摘要： A real-time algorithm for rendering of an inhomogeneous scattering media such as smoke under dynamic low-frequency environment lighting is described. An input media animation is represented as a sequence of density fields, each of which is decomposed into a weighted sum of a set of radial basis functions (RBFs) and an optional residual field. Source radiances from single and optionally multiple scattering are directly computed at only the RBF centers and then approximated at other points in the volume using an RBF-based interpolation. Unique approximation techniques are introduced in the computational algorithms to simplify and speed up the computation of source radiance contributed by single and multiple scattering. Using the computed source radiances, a ray marching technique using slice-based integration of radiance along each viewing ray may be performed to render the final image.

32. 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。

33. 发明授权

US07872653B2 Mesh puppetry 有权
标题翻译：网状木偶
公开(公告)号：US07872653B2
公开(公告)日：2011-01-18
申请号：US11764557
申请日：2007-06-18
申请人： Kun Zhou , Xiaohan Shi , Baining Guo
发明人： Kun Zhou , Xiaohan Shi , Baining Guo
IPC分类号： G06T15/00
CPC分类号： G06T13/40 , G06T17/20 , G06T19/20 , G06T2219/2021
摘要： This disclosure describes a variational framework for detail-preserving skinned mesh manipulation or deformation. The skinned mesh deformation occurs by optimizing skeleton position and vertex weights of a skeletal skinned mesh in an integrated manner. The process allows creating new poses and animations by specifying a few desired constraints for the skeletal skinned mesh in an interactive deformation platform. This process adjusts the skeletal position and solves for a deformed skinned mesh simultaneously with an algorithm in conjunction with the constraints. The algorithm includes a cascading optimization procedure. The mesh puppetry displays skinned mesh manipulation in real-time.The user interface will enable interactive design in creating new poses and animations for a skeletal skinned mesh, enabling direct manipulation of the skeletal skinned mesh to create natural, life-like poses, and providing automatic balancing and most-rigid constraints to create a puppet-like animation.
摘要翻译：本公开描述了用于细节保留皮肤网格操纵或变形的变体框架。通过以一体化的方式优化骨骼皮肤网格的骨架位置和顶点权重，发生皮肤网格变形。该过程允许通过在交互式变形平台中为骨骼皮肤网格指定一些所需的约束来创建新的姿势和动画。该过程调整骨骼位置，并与算法结合约束同时解决变形的皮肤网格。该算法包括级联优化过程。网状木偶实时显示皮肤网格操纵。用户界面将启用交互式设计，为骨骼皮肤网格创建新的姿势和动画，从而直接操纵骨骼皮肤网格以创建自然，生命般的姿势，并提供自动平衡和最严格的约束，以创建木偶 - 喜欢动画。

34. 发明授权

US07800627B2 Mesh quilting for geometric texture synthesis 有权
标题翻译：网格绗缝几何纹理合成
公开(公告)号：US07800627B2
公开(公告)日：2010-09-21
申请号：US11760607
申请日：2007-06-08
申请人： Kun Zhou , Xin Huang , Xi Wang , Baining Guo , Heung-Yeung Shum
发明人： Kun Zhou , Xin Huang , Xi Wang , Baining Guo , Heung-Yeung Shum
IPC分类号： G09G5/00 , G06T17/00 , G06F15/00
CPC分类号： G06T15/04
摘要： Mesh quilting for geometric texture synthesis involves synthesizing a geometric texture by quilting a mesh texture swatch. In an example embodiment, geometry is matched between a mesh texture swatch and a portion of a synthesized geometric texture. Correspondences are ascertained between elements of the mesh texture swatch and the portion of the synthesized geometric texture. The ascertained corresponding elements of the mesh texture swatch and the portion of the synthesized geometric texture are aligned via local deformation to create a new patch. The new patch is merged into an output texture space to grow the synthesized geometric texture.
摘要翻译：用于几何纹理合成的网格绗缝涉及通过绗缝网格纹理样本来合成几何纹理。在示例实施例中，几何在网格纹理样本和合成几何纹理的一部分之间进行匹配。在网格纹理样本的元素和合成的几何纹理的部分之间确定对应关系。确定的网格纹理样本的对应元素和合成的几何纹理的部分通过局部变形对齐，以创建新的补丁。新的补丁被合并到输出纹理空间中，以增加合成的几何纹理。

35. 发明授权

US07663623B2 Spherical harmonics scaling 有权
标题翻译：球面谐波缩放
公开(公告)号：US07663623B2
公开(公告)日：2010-02-16
申请号：US11612394
申请日：2006-12-18
申请人： Kun Zhou , Jiaping Wang , Stephen Lin , Baining Guo
发明人： Kun Zhou , Jiaping Wang , Stephen Lin , Baining Guo
IPC分类号： G06T15/50 , G06T15/00
CPC分类号： G06T15/55
摘要： A method, device and system is provided for providing global illumination of a scene. For example, global illumination may be provided in a rendered 3-dimensional image that may contain objects and/or light sources. Radiance functions or visibility functions may further be represented by scaling of spherical harmonics functions in the spherical harmonics domain. For example, scaling of spherical harmonics coefficients corresponding to a spherical function may be performed based on a spherical harmonics scaling transformation matrix based on an angular scaling function.
摘要翻译：提供了一种用于提供场景的全局照明的方法，装置和系统。例如，可以在可以包含对象和/或光源的渲染的三维图像中提供全局照明。亮度函数或可见度函数可以进一步通过球面谐波域中的球谐函数的缩放来表示。例如，可以基于基于角度缩放函数的球面谐波缩放变换矩阵来执行对应于球面函数的球谐函数的缩放。

36. 发明授权

US07589725B2 Soft shadows in dynamic scenes 有权
标题翻译：动态场景中的软阴影
公开(公告)号：US07589725B2
公开(公告)日：2009-09-15
申请号：US11478913
申请日：2006-06-30
申请人： John M. Snyder , Peter-Pike J. Sloan , Baining Guo , Kun Zhou , Rui Wang , Xinguo Liu , Zhong Ren , Bo Sun
发明人： John M. Snyder , Peter-Pike J. Sloan , Baining Guo , Kun Zhou , Rui Wang , Xinguo Liu , Zhong Ren , Bo Sun
IPC分类号： G06T15/50
CPC分类号： G06T15/60
摘要： The present soft shadowing technique pre-computes visibility of blockers using a log of a spherical harmonic visibility function. These logs can then be accumulated and exponentiated in real-time to yield the product visibility vector over all the blockers. The product visibility vector is combined with the light intensity and surface reflectance to determine shading at a receiver point in a computer-generated scene.
摘要翻译：目前的软阴影技术使用球面谐波可见度函数的对数来预先计算阻塞者的可视性。这些日志然后可以被实时累积和指数，以产生所有阻塞者的产品可见性向量。产品可见度向量与光强度和表面反射率相结合，以确定计算机生成的场景中的接收点处的阴影。

37. 发明申请

US20090006047A1 Real-Time Rendering of Light-Scattering Media 有权
标题翻译：光散射介质的实时渲染
公开(公告)号：US20090006047A1
公开(公告)日：2009-01-01
申请号：US11830794
申请日：2007-07-30
申请人： Kun Zhou , Zhong Ren , Stephen Ssu-te Lin , Baining Guo , Heung-Yeung Shum
发明人： Kun Zhou , Zhong Ren , Stephen Ssu-te Lin , Baining Guo , Heung-Yeung Shum
IPC分类号： G06F17/10
CPC分类号： G06T15/55
摘要： A real-time algorithm for rendering of an inhomogeneous scattering media such as smoke under dynamic low-frequency environment lighting is described. An input media animation is represented as a sequence of density fields, each of which is decomposed into a weighted sum of a set of radial basis functions (RBFs) and an optional residual field. Source radiances from single and optionally multiple scattering are directly computed at only the RBF centers and then approximated at other points in the volume using an RBF-based interpolation. Unique approximation techniques are introduced in the computational algorithms to simplify and speed up the computation of source radiance contributed by single and multiple scattering. Using the computed source radiances, a ray marching technique using slice-based integration of radiance along each viewing ray may be performed to render the final image.
摘要翻译：描述了在动态低频环境照明下渲染非均匀散射介质（如烟雾）的实时算法。输入媒体动画被表示为密度字段序列，每个密度字段被分解成一组径向基函数（RBF）和可选残余字段的加权和。仅从RBF中心直接计算来自单个和任选多个散射的源辐射，然后使用基于RBF的插值在体积中的其他点处近似。在计算算法中引入了独特的近似技术，以简化和加快由单次和多次散射贡献的源辐射的计算。使用计算的源辐射，可以执行使用沿着每个观察射线的基于片段的辐射积分的射线行进技术来渲染最终图像。

38. 发明申请

US20090002376A1 Gradient Domain Editing of Animated Meshes 有权
标题翻译：动画网格梯度域编辑
公开(公告)号：US20090002376A1
公开(公告)日：2009-01-01
申请号：US11772001
申请日：2007-06-29
申请人： Weiwei Xu , Kun Zhou , Yizhou Yu , Baining Guo
发明人： Weiwei Xu , Kun Zhou , Yizhou Yu , Baining Guo
IPC分类号： G06T13/00
CPC分类号： G06T13/40
摘要： Gradient domain editing of animated meshes is described. Exemplary systems edit deforming mesh sequences by applying Laplacian mesh editing techniques in the spacetime domain. A user selects relevant frames or handles to edit and the edits are propagated to the entire sequence. For example, if the mesh depicts an animated figure, then user-modifications to position of limbs, head, torso, etc., in one frame are propagated to the entire sequence. In advanced editing modes, a user can reposition footprints over new terrain and the system automatically conforms the walking figure to the new footprints. A user-sketched curve can automatically provide a new motion path. Movements of one animated figure can be transferred to a different figure. Caricature and cartoon special effects are available. The user can also select spacetime morphing to smoothly change the shape and motion of one animated figure into another over a short interval.
摘要翻译：描述动画网格的渐变域编辑。示例性系统通过在时空域中应用拉普拉斯网格编辑技术来编辑变形网格序列。用户选择要编辑的相关帧或句柄，并将编辑传播到整个序列。例如，如果网格描绘了动画人物，则在一个帧中的肢体，头部，躯干等的位置的用户修改被传播到整个序列。在高级编辑模式下，用户可以在新地形上重新定位足迹，系统会自动将走势图符合到新的脚印。用户素描曲线可以自动提供新的运动路径。一个动画人物的动作可以转移到不同的数字。有漫画和卡通特效。用户还可以选择时空变形，以便在短时间间隔内将一个动画人物的形状和运动平滑地改变为另一个。

39. 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。

40. 发明申请

US20080303840A1 Mesh Quilting for Geometric Texture Synthesis 有权
标题翻译：网纹绗缝几何纹理合成
公开(公告)号：US20080303840A1
公开(公告)日：2008-12-11
申请号：US11760607
申请日：2007-06-08
申请人： Kun Zhou , Xin Huang , Xi Wang , Baining Guo , Heung-Yeung Shum
发明人： Kun Zhou , Xin Huang , Xi Wang , Baining Guo , Heung-Yeung Shum
IPC分类号： G09G5/00 , G06T17/00
CPC分类号： G06T15/04
摘要： Mesh quilting for geometric texture synthesis involves synthesizing a geometric texture by quilting a mesh texture swatch. In an example embodiment, geometry is matched between a mesh texture swatch and a portion of a synthesized geometric texture. Correspondences are ascertained between elements of the mesh texture swatch and the portion of the synthesized geometric texture. The ascertained corresponding elements of the mesh texture swatch and the portion of the synthesized geometric texture are aligned via local deformation to create a new patch. The new patch is merged into an output texture space to grow the synthesized geometric texture.
摘要翻译：用于几何纹理合成的网格绗缝涉及通过绗缝网格纹理样本来合成几何纹理。在示例实施例中，几何在网格纹理样本和合成几何纹理的一部分之间进行匹配。在网格纹理样本的元素和合成的几何纹理的部分之间确定对应关系。确定的网格纹理样本的对应元素和合成的几何纹理的部分通过局部变形对齐，以创建新的补丁。新的补丁被合并到输出纹理空间中，以增加合成的几何纹理。

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