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公开(公告)号：US07319467B2
公开(公告)日：2008-01-15
申请号：US11092426
申请日：2005-03-29
申请人： Tim Weyrich , Wojciech Matusik , Hanspeter Pfister , Henrik Wann Jensen , Wai Kit Addy Ngan , Markus Gross
发明人： Tim Weyrich , Wojciech Matusik , Hanspeter Pfister , Henrik Wann Jensen , Wai Kit Addy Ngan , Markus Gross
IPC分类号： G06T15/50
CPC分类号： G06T15/50
摘要： A face is scanned to obtain a three-dimensional geometry of the face, images are also acquired of the face, and subsurface scattering of the face is measured. A translucency map is determined from the subsurface reflectance. A total surface reflectance and a normal map are estimated from the three-dimensional geometry and the images, and diffuse reflectance is estimated using the total reflectance. An albedo map is determined from the diffuse reflectance. The diffuse reflectance is subtracted from the total reflectance to obtain a surface reflectance. A set of bi-directional reflectance functions is fitted to the surface reflectance. Then, the set of bi-directional reflectance distribution functions, the albedo map, and the translucency map are combined to form a skin reflectance model of the face.
摘要翻译： 扫描面部以获得脸部的三维几何图像，并且还获取脸部的图像，并且测量脸部的表面下散射。 从地下反射率确定半透明度图。 从三维几何图像和图像估计总表面反射率和法线图，并且使用总反射率来估计漫反射。 从漫反射率确定反照率图。 从总反射率中减去漫反射，得到表面反射率。 一组双向反射函数适合表面反射率。 然后，将该组双向反射分布函数，反照率图和半透明度图组合，以形成面部的皮肤反射率模型。
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公开(公告)号：US06791542B2
公开(公告)日：2004-09-14
申请号：US10172963
申请日：2002-06-17
IPC分类号： G06T1700
CPC分类号： G06T15/205 , G06T17/20
摘要： A method models a three-dimensional object by first acquiring alpha mattes of the object for multiple viewpoints. The alpha mattes are then projected onto a surface hull completely enclosing the object to construct an opacity hull storing opacity values of the surface of the object. The object is illuminated for various lighting conditions while images are acquired. The images are projected onto the opacity hull to render the object under arbitrary lighting conditions for arbitrary viewpoints.
摘要翻译： 一种方法通过首先获取多个视点的对象的alpha遮罩来建模三维对象。 然后将alpha mattes投影到完全包围对象的表面船体上，以构建存储对象表面的不透明度值的不透明度船体。 当获取图像时，对象被照亮用于各种照明条件。 将图像投影到不透明度船体上，以便在任意视点的任意照明条件下渲染物体。
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公开(公告)号：US06903738B2
公开(公告)日：2005-06-07
申请号：US10173069
申请日：2002-06-17
申请人： Hanspeter Pfister , Wojciech Matusik , Wai Kit Addy Ngan , Leonard McMillan, Jr. , Paul Beardsley
发明人： Hanspeter Pfister , Wojciech Matusik , Wai Kit Addy Ngan , Leonard McMillan, Jr. , Paul Beardsley
CPC分类号： G06T15/205 , G06T17/20
摘要： A method models a three-dimensional object by first acquiring alpha mattes of the object for multiple viewpoints. The alpha mattes are then projected onto a surface hull completely enclosing the object to construct an opacity hull storing opacity values of the surface of the object. The object is illuminated for various lighting conditions while images are acquired. The images are projected onto the opacity hull to render the object under arbitrary lighting conditions for arbitrary viewpoints.
摘要翻译： 一种方法通过首先获取多个视点的对象的alpha遮罩来建模三维对象。 然后将alpha mattes投影到完全包围对象的表面船体上，以构建存储对象表面的不透明度值的不透明度船体。 当获取图像时，对象被照亮用于各种照明条件。 将图像投影到不透明度船体上，以便在任意视点的任意照明条件下渲染物体。
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公开(公告)号：US06831641B2
公开(公告)日：2004-12-14
申请号：US10172967
申请日：2002-06-17
申请人： Wojciech Matusik , Hanspeter Pfister , Wai Kit Addy Ngan , Leonard McMillan, Jr. , Remo Ziegler
发明人： Wojciech Matusik , Hanspeter Pfister , Wai Kit Addy Ngan , Leonard McMillan, Jr. , Remo Ziegler
IPC分类号： G06T1550
CPC分类号： G06T15/506 , G06T9/001 , G06T17/20
摘要： A method models a three-dimensional object by first acquiring alpha mattes of the object for multiple viewpoints. The alpha mattes are then projected onto a surface hull completely enclosing the object to construct an opacity hull storing opacity values of the surface of the object. The object is illuminated for various lighting conditions while images are acquired. The images are projected onto the opacity hull to render the object under arbitrary lighting conditions for arbitrary viewpoints.
摘要翻译： 一种方法通过首先获取多个视点的对象的alpha遮罩来建模三维对象。 然后将alpha mattes投影到完全包围对象的表面船体上，以构建存储对象表面的不透明度值的不透明度船体。 当获取图像时，对象被照亮用于各种照明条件。 将图像投影到不透明度船体上，以便在任意视点的任意照明条件下渲染物体。
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公开(公告)号：US20060227137A1
公开(公告)日：2006-10-12
申请号：US11092426
申请日：2005-03-29
申请人： Tim Weyrich , Wojciech Matusik , Hanspeter Pfister , Henrik Jensen , Wai Ngan , Markus Gross
发明人： Tim Weyrich , Wojciech Matusik , Hanspeter Pfister , Henrik Jensen , Wai Ngan , Markus Gross
IPC分类号： G06T15/50
CPC分类号： G06T15/50
摘要： A face is scanned to obtain a three-dimensional geometry of the face, images are also acquired of the face, and subsurface scattering of the face is measured. A translucency map is determined from the subsurface reflectance. A total surface reflectance and a normal map are estimated from the three-dimensional geometry and the images, and diffuse reflectance is estimated using the total reflectance. An albedo map is determined from the diffuse reflectance. The diffuse reflectance is subtracted from the total reflectance to obtain a surface reflectance. A set of bi-directional reflectance functions is fitted to the surface reflectance. Then, the set of bi-directional reflectance distribution functions, the albedo map, and the translucency map are combined to form a skin reflectance model of the face.
摘要翻译： 扫描面部以获得脸部的三维几何图像，并且还获取脸部的图像，并且测量脸部的表面下散射。 从地下反射率确定半透明度图。 从三维几何图像和图像估计总表面反射率和法线图，并且使用总反射率来估计漫反射。 从漫反射率确定反照率图。 从总反射率中减去漫反射，得到表面反射率。 一组双向反射函数适合表面反射率。 然后，将该组双向反射分布函数，反照率图和半透明度图组合，以形成面部的皮肤反射率模型。
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6.发明授权公开(公告)号：US08565909B2
公开(公告)日：2013-10-22
申请号：US13031036
申请日：2011-02-18
IPC分类号： G06F19/00
CPC分类号： B33Y50/00 , B29C64/00 , B29C64/386 , B33Y80/00 , G06F17/50 , G06F2217/10 , G06F2217/12
摘要： In an object generation system, consumable base materials are characterized in a characterization process wherein an object generation system can use a plurality of so-characterized base materials. User input representing a desired object and set of characteristics for that desired object are processed, using a computer or computing device, to derive a mapping of locations for placement of portions of the plurality of base materials such that when the mapping is provided to an object generator, the generated object approximates the representing a desired object and set of characteristics. The characterization of a base material might include elasticity of the base material, the user input might be a desired shape and elasticity, the object generator might be a 3D multi-material printer and the generated object might at least approximate the desired shape and elasticity as a result of being constructed from the plurality of base materials used by the printer.
摘要翻译： 在对象生成系统中，消耗性基材的特征在于表征过程，其中对象生成系统可以使用多个如此表征的基材。 使用计算机或计算设备处理表示期望对象的所需对象和特征集的用户输入，以导出用于放置多个基础材料的部分的位置的映射，使得当将映射提供给对象时 生成的对象近似表示期望的对象和特征集合。 基材的表征可能包括基材的弹性，用户输入可能是期望的形状和弹性，对象生成器可以是3D多材料打印机，并且所生成的对象可以至少近似所需的形状和弹性，如 这是由打印机使用的多种基材构成的结果。
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7.发明申请公开(公告)号：US20120053716A1
公开(公告)日：2012-03-01
申请号：US13031036
申请日：2011-02-18
IPC分类号： G06F19/00
CPC分类号： B33Y50/00 , B29C64/00 , B29C64/386 , B33Y80/00 , G06F17/50 , G06F2217/10 , G06F2217/12
摘要： In an object generation system, consumable base materials are characterized in a characterization process wherein an object generation system can use a plurality of so-characterized base materials. User input representing a desired object and set of characteristics for that desired object are processed, using a computer or computing device, to derive a mapping of locations for placement of portions of the plurality of base materials such that when the mapping is provided to an object generator, the generated object approximates the representing a desired object and set of characteristics. The characterization of a base material might include elasticity of the base material, the user input might be a desired shape and elasticity, the object generator might be a 3D multi-material printer and the generated object might at least approximate the desired shape and elasticity as a result of being constructed from the plurality of base materials used by the printer.
摘要翻译： 在对象生成系统中，消耗性基材的特征在于表征过程，其中对象生成系统可以使用多个如此表征的基材。 使用计算机或计算设备处理表示期望对象的所需对象和特征集的用户输入，以导出用于放置多个基础材料的部分的位置的映射，使得当将映射提供给对象时 生成的对象近似表示期望的对象和特征集合。 基材的表征可能包括基材的弹性，用户输入可能是期望的形状和弹性，对象生成器可以是3D多材料打印机，并且所生成的对象可以至少近似所需的形状和弹性，如 这是由打印机使用的多种基材构成的结果。
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公开(公告)号：US20060028474A1
公开(公告)日：2006-02-09
申请号：US10912724
申请日：2004-08-05
申请人： Hanspeter Pfister , Tim Weyrich , Markus Gross
发明人： Hanspeter Pfister , Tim Weyrich , Markus Gross
摘要： A method renders a model of an object by first acquiring, in an acquisition space, a reflectance field of the object. The reflectance field includes a set of reflectance images of the object and a point model of the object. The model is deformed in an object space to generate a deformed model. For each point of the deformed model in the object space, the set of the reflectance images is queried in the acquisition space to obtain reflectance coefficients for each point. Each point of the deformed model is then shaded according to the corresponding reflectance coefficients to generate an image of the object reflecting the deforming.
摘要翻译： 一种方法通过首先在采集空间中获取对象的反射场，从而呈现对象的模型。 反射场包括物体的一组反射图像和物体的点模型。 模型在对象空间中变形以生成变形模型。 对于对象空间中变形模型的每个点，在采集空间中查询反射率图像的集合，以获得每个点的反射系数。 然后根据相应的反射系数对变形模型的每个点进行遮蔽，以产生反映变形的物体的图像。
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公开(公告)号：US07230620B2
公开(公告)日：2007-06-12
申请号：US10912724
申请日：2004-08-05
申请人： Hanspeter Pfister , Tim Weyrich , Markus Gross
发明人： Hanspeter Pfister , Tim Weyrich , Markus Gross
IPC分类号： G06T15/60
摘要： A method renders a model of an object by first acquiring, in an acquisition space, a reflectance field of the object. The reflectance field includes a set of reflectance images of the object and a point model of the object. The model is deformed in an object space to generate a deformed model. For each point of the deformed model in the object space, the set of the reflectance images is queried in the acquisition space to obtain reflectance coefficients for each point. Each point of the deformed model is then shaded according to the corresponding reflectance coefficients to generate an image of the object reflecting the deforming.
摘要翻译： 一种方法通过首先在采集空间中获取对象的反射场，从而呈现对象的模型。 反射场包括物体的一组反射图像和物体的点模型。 模型在对象空间中变形以生成变形模型。 对于对象空间中变形模型的每个点，在采集空间中查询反射率图像的集合，以获得每个点的反射系数。 然后根据相应的反射系数对变形模型的每个点进行遮蔽，以产生反映变形的物体的图像。
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公开(公告)号：US07609906B2
公开(公告)日：2009-10-27
申请号：US11397227
申请日：2006-04-04
IPC分类号： G06K9/40
CPC分类号： H04N13/122
摘要： A method and system acquire and display light fields. A continuous light field is reconstructed from input samples of an input light field of a 3D scene acquired by cameras according to an acquisition parameterization. The continuous light is reparameterized according to a display parameterization and then prefiltering and sampled to produce output samples having the display parametrization. The output samples are displayed as an output light field using a 3D display device.
摘要翻译： 一种方法和系统获取和显示光场。 根据采集参数化，由摄像机获取的3D场景的输入光场的输入样本重建连续光场。 根据显示参数化对连续光进行重新参数化，然后对其进行预过滤和采样，以产生具有显示参数化的输出样本。 使用3D显示装置将输出样本显示为输出光场。
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