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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：US20060280343A1
公开(公告)日：2006-12-14
申请号：US11251222
申请日：2005-10-14
CPC分类号： G06K9/4661
摘要： A method recognizes a face in an image. A morphable model having shape and pose parameters is fitted to a face in an image to construct a three-dimensional model of the face. Texture is extracted from the face in the image using the three-dimensional model. The shape and texture are projected into a bilinear illumination model to generate illumination bases for the face in the image. The illumination bases for the face in the image are compared to illumination bases of each of a plurality of bilinear illumination models of known faces to identify the face in the image.
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公开(公告)号：US20060280342A1
公开(公告)日：2006-12-14
申请号：US11152528
申请日：2005-06-14
CPC分类号： G06K9/4661
摘要： A method generates a three-dimensional, bi-linear, illumination model for arbitrary faces. A large number of images are acquired of many different faces. For each face, multiple images are acquired with varying poses and varying illumination. A three-mode singular value decomposition is applied to the images to determine parameters of the model. The model can be fit to a probe image of an unknown face. Then, the model can be compared with models of a gallery of images of unknown faces to recognize the face in the probe image.
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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：US06792140B2
公开(公告)日：2004-09-14
申请号：US09842972
申请日：2001-04-26
IPC分类号： G06K900
CPC分类号： G06T7/564 , G06T7/557 , G06T2200/08
摘要： A system digitizes a three-dimensional object as a three-dimension model by placing the object on a turntable while taking two sets of corresponding images. The first set of images and the second set of images are obtained while rotating the turntable to a various positions and illuminated the object with the overhead lights and backlights. There is a one to one correspondence for images in each set for each position of the turntable. Object shape data and texture data are respectively extracted from the first and second set of images. The object shape data is correlated with the object texture data to construct the three-dimensional digital model stored in a memory of a computer system.
摘要翻译： 系统通过将对象放置在转盘上同时采取两组相应的图像，将三维物体数字化为三维模型。 获得第一组图像和第二组图像，同时将转盘旋转到各种位置，并用顶灯和背光照亮物体。 对于转盘的每个位置，每组中的图像有一对一的对应关系。 从第一和第二组图像分别提取对象形状数据和纹理数据。 对象形状数据与对象纹理数据相关联，以构建存储在计算机系统的存储器中的三维数字模型。
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公开(公告)号：US06639597B1
公开(公告)日：2003-10-28
申请号：US09514545
申请日：2000-02-28
IPC分类号： G06T1520
CPC分类号： G06T15/405
摘要： In a method for projecting surface points of a graphic object onto pixels in a depth buffer to determine depth values of the pixels, each surface point is projected onto a corresponding pixels. A depth value of each projected surface point is stored in the pixel only if the depth value of the projected surface point is less than the depth value of the pixel. A tangential disk is constructed at a position of the surface point, the tangential disk has a radius larger than a maximum distance between the surface points. The tangential disk is projected onto a corresponding subset of the pixels. Depth values of the projected tangential disk are stored in the corresponding subsets of pixels only if the depth values of the projected tangential disk are less than the depth values of the corresponding subsets of pixels.
摘要翻译： 在用于将图形对象的表面点投影到深度缓冲器中的像素以确定像素的深度值的方法中，每个表面点被投影到相应的像素上。 如果投影面点的深度值小于像素的深度值，则每个投影面点的深度值被存储在像素中。 切向盘构造在表面点的位置处，切向盘的半径大于表面点之间的最大距离。 切线盘被投影到相应的像素子集上。 仅当投影切向盘的深度值小于相应的像素子集的深度值时，才将投影切线盘的深度值存储在相应的像素子集中。
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公开(公告)号：US06583787B1
公开(公告)日：2003-06-24
申请号：US09514546
申请日：2000-02-28
IPC分类号： G06T1120
CPC分类号： G06T15/005
摘要： A rendering system pipeline includes a memory storing shape and shade attributes of a surface of the object. The attributes are arranged as an octree in the memory. The octree includes a plurality of nodes arranged at a plurality of levels, each node storing a plurality of zero-dimensional n-tuples, each n-tuple locally approximating the shape and shade attributes of a portion of the surface of the graphic object, and the n-tuples having a sampling resolution of an image space. A plurality of parallel processing pipelines are connected the memory. The pipelines project the shape and shade attributes of the octree to an image plane having a selected orientation by traversing the n-tuples of the nodes of the octree from a lowest resolution level to a highest resolution level.
摘要翻译： 渲染系统管线包括存储对象表面的形状和阴影属性的存储器。 这些属性在内存中被排列成八叉树。 八叉树包括以多个级别排列的多个节点，每个节点存储多个零维n元组，每个n元组局部近似图形对象表面的一部分的形状和阴影属性，以及 n元组具有图像空间的采样分辨率。 多个并行处理管线连接存储器。 管线通过遍历八叉树节点的n元组从最低分辨率级别到最高分辨率级别，将八叉树的形状和阴影属性投影到具有所选取向的图像平面。
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公开(公告)号：US06580425B1
公开(公告)日：2003-06-17
申请号：US09514543
申请日：2000-02-28
IPC分类号： G06T1700
CPC分类号： G06T15/205 , G06T15/04 , G06T17/005
摘要： In a method for representing a graphic object, rays are cast through the object. The rays originate at orthogonal planes surrounding the object. The surface of the object is sampled for shape and shade attributes at points where the rays intersect the surface. The sampled shape and shade attributes of each sampled point are stored in an octree stored in the memory.
摘要翻译： 在用于表示图形对象的方法中，通过对象投射光线。 光线起源于物体周围的正交平面。 在光线与表面相交的点处，对象的表面进行采样以获取形状和阴影属性。 每个采样点的采样形状和阴影属性被存储在存储器中的八叉树中。
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公开(公告)号：US06532017B1
公开(公告)日：2003-03-11
申请号：US09315178
申请日：1999-05-20
申请人： James M. Knittel , Stephen R. Burgess , Jan C. Hardenbergh , Christopher J. Kappler , Hugh C. Lauer , William R. Peet , Takahide Ohkami , Hanspeter Pfister
发明人： James M. Knittel , Stephen R. Burgess , Jan C. Hardenbergh , Christopher J. Kappler , Hugh C. Lauer , William R. Peet , Takahide Ohkami , Hanspeter Pfister
IPC分类号： G06T120
CPC分类号： G06T15/005 , G06T15/08
摘要： A plurality of identical rendering pipelines are connected in parallel to read an array of voxels and to write an array of pixels. Each pipeline processes one voxel in one processing cycle of the pipelines. Each pipeline includes a plurality of serially connected different stages. The stages can include interpolation, classification, gradient estimation, illumination, and compositing stages. Interfaces connect identical stages in adjacent pipelines as one-way rings to communicate information associated with spatially adjacent voxels, and delay buffers connected parallel to particular stages communicate information associated with temporally adjacent voxels.
摘要翻译： 多个相同的呈现管线并联连接以读取体素数组并写入像素阵列。 每个管道在管道的一个处理循环中处理一个体素。 每个管道包括多个串联连接的不同级。 阶段可以包括插值，分类，梯度估计，照明和合成阶段。 接口将相邻管道中的相同级连接为单向环以传送与空间相邻体素相关联的信息，并且与特定级并联连接的延迟缓冲器传送与时间相邻体素相关联的信息。
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