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：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：US09013496B2

公开(公告)日：2015-04-21

申请号：US13526716

申请日：2012-06-19

申请人： Jiaping Wang ,  Peiran Ren ,  Minmin Gong ,  Xin Tong ,  Stephen S. Lin ,  Baining Guo

发明人： Jiaping Wang ,  Peiran Ren ,  Minmin Gong ,  Xin Tong ,  Stephen S. Lin ,  Baining Guo

IPC分类号： G09G5/00 ,  G06N99/00 ,  G06T15/50

CPC分类号： G06T15/506 ,  G06N99/005 ,  G06T15/80

摘要： Some implementations disclosed herein provide techniques and arrangements to render global light transport in real-time or near real-time. For example, in a pre-computation stage, a first computing device may render points of surfaces (e.g., using multiple light bounces and the like). Attributes for each of the points may be determined. A plurality of machine learning algorithms may be trained using particular attributes from the attributes. For example, a first machine learning algorithm may be trained using a first portion of the attributes and a second machine learning algorithm may be trained using a second portion of the attributes. The trained machine learning algorithms may be used by a second computing device to render components (e.g., diffuse and specular components) of indirect shading in real-time.

摘要翻译： 本文公开的一些实施例提供了实时或接近实时地呈现全局光传输的技术和布置。 例如，在预计算阶段，第一计算设备可以渲染表面的点（例如，使用多个光反射等）。 可以确定每个点的属性。 可以使用来自属性的特定属性来训练多个机器学习算法。 例如，可以使用属性的第一部分来训练第一机器学习算法，并且可以使用属性的第二部分来训练第二机器学习算法。 经过训练的机器学习算法可以被第二计算设备用于实时地呈现间接着色的组件（例如，漫反射和镜面分量）。

公开(公告)号：US20130335434A1

公开(公告)日：2013-12-19

申请号：US13526716

申请日：2012-06-19

申请人： Jiaping Wang ,  Peiran Ren ,  Minmin Gong ,  Xin Tong ,  Stephen S. Lin ,  Baining Guo

发明人： Jiaping Wang ,  Peiran Ren ,  Minmin Gong ,  Xin Tong ,  Stephen S. Lin ,  Baining Guo

IPC分类号： G09G5/00

CPC分类号： G06T15/506 ,  G06N99/005 ,  G06T15/80

摘要： Some implementations disclosed herein provide techniques and arrangements to render global light transport in real-time or near real-time. For example, in a pre-computation stage, a first computing device may render points of surfaces (e.g., using multiple light bounces and the like). Attributes for each of the points may be determined. A plurality of machine learning algorithms may be trained using particular attributes from the attributes. For example, a first machine learning algorithm may be trained using a first portion of the attributes and a second machine learning algorithm may be trained using a second portion of the attributes. The trained machine learning algorithms may be used by a second computing device to render components (e.g., diffuse and specular components) of indirect shading in real-time.

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：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：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：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：US09098945B2

公开(公告)日：2015-08-04

申请号：US12433910

申请日：2009-05-01

申请人： Jiaping Wang ,  Shuang Zhao ,  Xin Tong ,  John M. Snyder ,  Baining Guo

发明人： Jiaping Wang ,  Shuang Zhao ,  Xin Tong ,  John M. Snyder ,  Baining Guo

IPC分类号： G06T15/50

CPC分类号： G06T15/506

摘要： Described is a search technology in which spatially varying anisotropic reflectance is modeled using image data captured from a single view. Reflectance at each point is represented using a microfacet-based Bidirectional Reflectance Distribution Function (BRDF). Modeling processes the image data, which provides a partial normal distribution function (NDF) for each surface point. The NDF at each selected point is completed by texture synthesis using similar, overlapping partial NDFs from other points. Also described is a scanning device that illuminates a sample surface from a two-dimensional set of light directions using a linear array of LEDs moved over a flat sample.

摘要翻译： 描述了一种搜索技术，其中使用从单个视图捕获的图像数据来建模空间变化的各向异性反射率。 每个点的反射率使用基于微量的基于双向反射分布函数（BRDF）表示。 建模处理图像数据，为每个表面点提供部分正态分布函数（NDF）。 每个选定点的NDF通过纹理合成完成，使用与其他点相似的，重叠的部分NDF。 还描述了使用在扁平样品上移动的LED的线性阵列从二维光方向照射样品表面的扫描装置。