公开(公告)号：US07430490B2

公开(公告)日：2008-09-30

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 Michael Snyder

发明人： Xin Tong ,  Yanyun Chen ,  Baining Guo ,  Heung-Yeung Shum ,  Jiaping Wang ,  John Michael Snyder

IPC分类号： G06T15/40

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。

公开(公告)号：US08953037B2

公开(公告)日：2015-02-10

申请号：US13274191

申请日：2011-10-14

申请人： Jiaping Wang ,  Baining Guo ,  Peiran Ren ,  John Michael Snyder ,  Xin Tong

发明人： Jiaping Wang ,  Baining Guo ,  Peiran Ren ,  John Michael Snyder ,  Xin Tong

IPC分类号： H04N9/47 ,  H04N1/00 ,  G01N21/55

CPC分类号： H04N1/00018 ,  G01N21/55 ,  H04N1/00013 ,  H04N1/00045 ,  H04N1/00087

摘要： A system for reflectance acquisition of a target includes a light source, an image capture device, and a reflectance reference chart. The reflectance reference chart is fixed relative to the target. The light source provides a uniform band of light across at least a dimension of the target. The image capture device is configured and positioned to encompass at least a portion of the target and at least a portion of the reflectance reference chart within a field-of-view of the image capture device. The image capture device captures a sequence of images of the target and the reflectance reference chart during a scan thereof. Reflectance responses are calculated for the pixels in the sequence of images. Reference reflectance response distribution functions are matched to the calculated reflectance responses, and an image of the target is reconstructed based at least in part on the matched reference reflectance response distribution functions.

摘要翻译： 用于目标的反射获取的系统包括光源，图像捕获装置和反射率参考图。 反射率参考图表相对于目标是固定的。 光源在目标的至少一维上提供均匀的光束。 图像捕获设备被配置和定位成在图像捕获设备的视野内包围目标的至少一部分和反射参考图的至少一部分。 图像捕获装置在其扫描期间捕获目标的图像序列和反射率参考图。 针对图像序列中的像素计算反射响应。 参考反射响应分布函数与所计算的反射率响应匹配，并且至少部分地基于匹配的参考反射响应分布函数来重建目标的图像。

公开(公告)号：US08570522B2

公开(公告)日：2013-10-29

申请号：US13538558

申请日：2012-06-29

申请人： Jiaping Wang ,  Moshe Benezra ,  Xin Tong ,  John Michael Snyder ,  Baining Guo

发明人： Jiaping Wang ,  Moshe Benezra ,  Xin Tong ,  John Michael Snyder ,  Baining Guo

IPC分类号： G01N21/55

CPC分类号： G01N21/55

摘要： A mechanism is disclosed for capturing reflected rays from a surface. A first and second lens aligned along a same optical center axis are configured so that a beam of light collimated parallel to the lens center axis directed to a first side, is converged toward the lens center axis on a second side. A first light beam source between the first and second lenses directs a light beam toward the first lens parallel to the optical center axis. Second light beam source(s) on the second side of the first lens, direct a light beam toward a focal plane of the first lens at a desired angle. An image capturing component, at the second side of the second lens, has an image capture surface directed toward the second lens to capture images of the light reflected from a sample capture surface at the focal plane of the first lens.

摘要翻译： 公开了用于从表面捕获反射光线的机构。 沿着相同的光学中心轴对准的第一和第二透镜被配置为使得平行于指向第一侧的透镜中心轴准直的光束在第二侧上朝向透镜中心轴会聚。 第一和第二透镜之间的第一光束源将平行于光学中心轴的光束朝着第一透镜引导。 在第一透镜的第二侧上的第二光束源将光束以期望的角度引导到第一透镜的焦平面。 在第二透镜的第二侧的图像捕获部件具有指向第二透镜的图像捕获表面，以捕获在第一透镜的焦平面处从样品捕获表面反射的光的图像。

公开(公告)号：US20120268637A1

公开(公告)日：2012-10-25

申请号：US13538558

申请日：2012-06-29

申请人： Jiaping Wang ,  Moshe Benezra ,  Xin Tong ,  John Michael Snyder ,  Baining Guo

发明人： Jiaping Wang ,  Moshe Benezra ,  Xin Tong ,  John Michael Snyder ,  Baining Guo

IPC分类号： G02B13/16 ,  H04N5/225 ,  H04N5/335

CPC分类号： G01N21/55

摘要： A mechanism is disclosed for capturing reflected rays from a surface. A first and second lens aligned along a same optical center axis are configured so that a beam of light collimated parallel to the lens center axis directed to a first side, is converged toward the lens center axis on a second side. A first light beam source between the first and second lenses directs a light beam toward the first lens parallel to the optical center axis. Second light beam source(s) on the second side of the first lens, direct a light beam toward a focal plane of the first lens at a desired angle. An image capturing component, at the second side of the second lens, has an image capture surface directed toward the second lens to capture images of the light reflected from a sample capture surface at the focal plane of the first lens.

摘要翻译： 公开了用于从表面捕获反射光线的机构。 沿着相同的光学中心轴对准的第一和第二透镜被配置为使得平行于指向第一侧的透镜中心轴准直的光束在第二侧上朝向透镜中心轴会聚。 第一和第二透镜之间的第一光束源将平行于光学中心轴的光束朝着第一透镜引导。 在第一透镜的第二侧上的第二光束源将光束以期望的角度引导到第一透镜的焦平面。 在第二透镜的第二侧的图像捕获部件具有指向第二透镜的图像捕获表面，以捕获在第一透镜的焦平面处从样品捕获表面反射的光的图像。

公开(公告)号：US20130093883A1

公开(公告)日：2013-04-18

申请号：US13274191

申请日：2011-10-14

申请人： Jiaping Wang ,  Baining Guo ,  Peiran Ren ,  John Michael Snyder ,  Xin Tong

发明人： Jiaping Wang ,  Baining Guo ,  Peiran Ren ,  John Michael Snyder ,  Xin Tong

IPC分类号： H04N7/18

CPC分类号： H04N1/00018 ,  G01N21/55 ,  H04N1/00013 ,  H04N1/00045 ,  H04N1/00087

摘要： A system for reflectance acquisition of a target includes a light source, an image capture device, and a reflectance reference chart. The reflectance reference chart is fixed relative to the target. The light source provides a uniform band of light across at least a dimension of the target. The image capture device is configured and positioned to encompass at least a portion of the target and at least a portion of the reflectance reference chart within a field-of-view of the image capture device. The image capture device captures a sequence of images of the target and the reflectance reference chart during a scan thereof. Reflectance responses are calculated for the pixels in the sequence of images. Reference reflectance response distribution functions are matched to the calculated reflectance responses, and an image of the target is reconstructed based at least in part on the matched reference reflectance response distribution functions.

摘要翻译： 用于目标的反射获取的系统包括光源，图像捕获装置和反射率参考图。 反射率参考图表相对于目标是固定的。 光源在目标的至少一维上提供均匀的光束。 图像捕获设备被配置和定位成在图像捕获设备的视野内包围目标的至少一部分和反射参考图的至少一部分。 图像捕获装置在其扫描期间捕获目标的图像序列和反射率参考图。 针对图像序列中的像素计算反射响应。 参考反射响应分布函数与所计算的反射率响应匹配，并且至少部分地基于匹配的参考反射响应分布函数来重建目标的图像。

公开(公告)号：US08248613B2

公开(公告)日：2012-08-21

申请号：US12769974

申请日：2010-04-29

申请人： Jiaping Wang ,  Moshe Benezra ,  Xin Tong ,  John Michael Snyder ,  Baining Guo

发明人： Jiaping Wang ,  Moshe Benezra ,  Xin Tong ,  John Michael Snyder ,  Baining Guo

IPC分类号： G01N21/55

CPC分类号： G01N21/55

摘要： A mechanism is disclosed for capturing reflected rays from a surface. A first and second lens aligned along a same optical center axis are configured so that a beam of light collimated parallel to the lens center axis directed to a first side, is converged toward the lens center axis on a second side. A first light beam source between the first and second lenses directs a light beam toward the first lens parallel to the optical center axis. Second light beam source(s) on the second side of the first lens, direct a light beam toward a focal plane of the first lens at a desired angle. An image capturing component, at the second side of the second lens, has an image capture surface directed toward the second lens to capture images of the light reflected from a sample capture surface at the focal plane of the first lens.

摘要翻译： 公开了用于从表面捕获反射光线的机构。 沿着相同的光学中心轴对准的第一和第二透镜被配置为使得平行于指向第一侧的透镜中心轴准直的光束在第二侧上朝向透镜中心轴会聚。 第一和第二透镜之间的第一光束源将平行于光学中心轴的光束朝着第一透镜引导。 在第一透镜的第二侧上的第二光束源将光束以期望的角度引导到第一透镜的焦平面。 在第二透镜的第二侧的图像捕获部件具有指向第二透镜的图像捕获表面，以捕获在第一透镜的焦平面处从样品捕获表面反射的光的图像。

公开(公告)号：US20110267619A1

公开(公告)日：2011-11-03

申请号：US12769974

申请日：2010-04-29

申请人： Jiaping Wang ,  Moshe Benezra ,  Xin Tong ,  John Michael Snyder ,  Baining Guo

发明人： Jiaping Wang ,  Moshe Benezra ,  Xin Tong ,  John Michael Snyder ,  Baining Guo

IPC分类号： G01N21/55

CPC分类号： G01N21/55

摘要： A mechanism is disclosed for capturing reflected rays from a surface. A first and second lens aligned along a same optical center axis are configured so that a beam of light collimated parallel to the lens center axis directed to a first side, is converged toward the lens center axis on a second side. A first light beam source between the first and second lenses directs a light beam toward the first lens parallel to the optical center axis. Second light beam source(s) on the second side of the first lens, direct a light beam toward a focal plane of the first lens at a desired angle. An image capturing component, at the second side of the second lens, has an image capture surface directed toward the second lens to capture images of the light reflected from a sample capture surface at the focal plane of the first lens.

摘要翻译： 公开了用于从表面捕获反射光线的机构。 沿着相同的光学中心轴对准的第一和第二透镜被配置为使得平行于指向第一侧的透镜中心轴准直的光束在第二侧上朝向透镜中心轴会聚。 第一和第二透镜之间的第一光束源将平行于光学中心轴的光束朝着第一透镜引导。 在第一透镜的第二侧上的第二光束源将光束以期望的角度引导到第一透镜的焦平面。 在第二透镜的第二侧的图像捕获部件具有指向第二透镜的图像捕获表面，以捕获在第一透镜的焦平面处从样品捕获表面反射的光的图像。

公开(公告)号：US20090006052A1

公开(公告)日：2009-01-01

申请号：US11770974

申请日：2007-06-29

申请人： Kun Zhou ,  Qiming Hou ,  Minmin Gong ,  John Michael Snyder ,  Baining Guo ,  Heung-Yeung Shum

发明人： Kun Zhou ,  Qiming Hou ,  Minmin Gong ,  John Michael Snyder ,  Baining Guo ,  Heung-Yeung Shum

IPC分类号： G06G7/48

CPC分类号： G06T15/50

摘要： A real-time algorithm for rendering of an inhomogeneous scattering medium such as fog with a surface object immersed therein is described. An input media animation is represented as a sequence of density fields. The algorithm computes surface reflectance of the surface object in the inhomogeneous scattering medium. The algorithm may also compute airlight of the inhomogeneous scattering medium. Several approximations are taken which lead to analytical solutions of quantities such as optical depth integrations and single scattering integrations, and a reduced number of integrations that need to be calculated. The resultant algorithm is able to render inhomogeneous media including their shadowing and scattering effects in the real time. The algorithm may be adopted for a variety of light sources including point lights and environmental lights.

摘要翻译： 描述了用于渲染非均匀散射介质（例如，其中浸入表面物体的雾）的实时算法。 输入媒体动画被表示为一系列密度字段。 该算法计算非均匀散射介质中表面物体的表面反射率。 该算法还可以计算不均匀散射介质的空气光。 采用几种近似方法，其导致诸如光学深度积分和单一散射积分的量的分析解，以及需要计算的减少的积分数。 所得到的算法能够实时渲染包括它们的阴影和散射效果的非均匀介质。 该算法可以用于各种光源，包括点光源和环境光源。

公开(公告)号：US20090006051A1

公开(公告)日：2009-01-01

申请号：US11770942

申请日：2007-06-29

申请人： Kun Zhou ,  Qiming Hou ,  Minmin Gong ,  John Michael Snyder ,  Baining Guo ,  Heung-Yeung Shum

发明人： Kun Zhou ,  Qiming Hou ,  Minmin Gong ,  John Michael Snyder ,  Baining Guo ,  Heung-Yeung Shum

IPC分类号： G06G7/48

CPC分类号： G06T15/506

摘要： A real-time algorithm for rendering an inhomogeneous scattering medium such as fog 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) such as Gaussians. The algorithm computes airlight and surface reflectance of the inhomogeneous scattering medium. Several approximations are taken which lead to analytical solutions of quantities such as an optical depth integrations and single scattering integrations, and a reduced number of integrations that need to be calculated. The resultant algorithm is able to render inhomogeneous media including their shadowing and scattering effects in real time. The algorithm may be adopted for a variety of light sources including point lights and environmental lights.

摘要翻译： 描述了用于渲染非均匀散射介质（如雾）的实时算法。 输入媒体动画被表示为密度字段的序列，每个密度字段被分解成一组径向基函数（RBF）如Gauss的加权和。 该算法计算不均匀散射介质的气孔和表面反射率。 采用几种近似方法，其导致诸如光学深度积分和单一散射积分的量的分析解，以及需要计算的减少的积分数。 所得到的算法能够实时渲染包括它们的阴影和散射效应的不均匀介质。 该算法可以用于各种光源，包括点光源和环境光源。

公开(公告)号：US07286127B2

公开(公告)日：2007-10-23

申请号：US11158428

申请日：2005-06-22

申请人： Kun Zhou ,  John Michael Snyder ,  Xinguo Liu ,  Baining Guo ,  Heung-Yeung Shum

发明人： Kun Zhou ,  John Michael Snyder ,  Xinguo Liu ,  Baining Guo ,  Heung-Yeung Shum

IPC分类号： G06T15/00

CPC分类号： G06T17/20 ,  G06T13/20

摘要： Large mesh deformation using the volumetric graph Laplacian is described. In one aspect, information is received from a user, wherein the information indicates how an original mesh is to be deformed. The original mesh is then deformed based on the information and application of a volumetric differential operator to a volumetric graph generated from the original mesh.

摘要翻译： 描述了使用体积图拉普拉斯算子的大网格变形。 在一个方面，从用户接收信息，其中信息指示原始网格如何变形。 然后将原始网格基于体积差分算子的信息和应用变形为从原始网格生成的体积图。