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1.发明授权公开(公告)号：US09562857B2
公开(公告)日：2017-02-07
申请号：US14212751
申请日：2014-03-14
摘要： An apparatus to measure surface orientation maps of an object may include a light source that is configured to illuminate the object with a controllable field of illumination. One or more cameras may be configured to capture at least one image of the object. A processor may be configured to process the image(s) to extract the reflectance properties of the object including an albedo, a reflection vector, a roughness, and/or anisotropy parameters of a specular reflectance lobe associated with the object. The controllable field of illumination may include limited-order Spherical Harmonics (SH) and Fourier Series (FS) illumination patterns with substantially similar polarization. The SH and FS illumination patterns are used with different light sources.
摘要翻译： 用于测量物体的表面取向图的装置可以包括配置成用可控制的照明场照射物体的光源。 一个或多个摄像机可以被配置为捕获对象的至少一个图像。 处理器可以被配置为处理图像以提取对象的反射特性，包括与对象相关联的镜面反射率波瓣的反照率，反射矢量，粗糙度和/或各向异性参数。 可控的照明领域可以包括具有基本相似极化的有限次球面谐波（SH）和傅里叶级数（FS）照明图案。 SH和FS照明图案与不同的光源一起使用。
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2.发明申请公开(公告)号：US20140268160A1
公开(公告)日：2014-09-18
申请号：US14212751
申请日：2014-03-14
摘要： An apparatus to measure surface orientation maps of an object may include a light source that is configured to illuminate the object with a controllable field of illumination. One or more cameras may be configured to capture at least one image of the object. A processor may be configured to process the image(s) to extract the reflectance properties of the object including an albedo, a reflection vector, a roughness, and/or anisotropy parameters of a specular reflectance lobe associated with the object. The controllable field of illumination may include limited-order Spherical Harmonics (SH) and Fourier Series (FS) illumination patterns with substantially similar polarization. The SH and FS illumination patterns are used with different light sources.
摘要翻译： 用于测量物体的表面取向图的装置可以包括配置成用可控制的照明场照射物体的光源。 一个或多个摄像机可以被配置为捕获对象的至少一个图像。 处理器可以被配置为处理图像以提取对象的反射特性，包括与对象相关联的镜面反射率波瓣的反照率，反射矢量，粗糙度和/或各向异性参数。 可控的照明领域可以包括具有基本相似极化的有限次球面谐波（SH）和傅里叶级数（FS）照明图案。 SH和FS照明图案与不同的光源一起使用。
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3.发明申请公开(公告)号：US20160261850A1
公开(公告)日：2016-09-08
申请号：US14640813
申请日：2015-03-06
CPC分类号： H04N13/243 , G06K9/00221 , G06T15/04 , G06T2207/10012 , G06T2215/12 , H04N13/254 , H04N13/257 , H04N13/296
摘要： A system may almost instantly capturing high-resolution geometry and reflectance data of a portion of a human subject. The system may include multiple cameras, each oriented to controllably capture an image of the portion of the human subject from a different location in space; multiple lights, each oriented to controllably illuminate the portion of the human subject from a location in space significantly different than the location in space of the other lights; and a controller. The controller may divide the cameras into subgroups with each subgroup of cameras containing at least one camera and with each camera belonging to only one of the subgroups; cause each subgroup of cameras to sequentially capture a single image of the portion of the human subject; and cause at least one of the lights to light while each subgroup of cameras captures a single image of the portion of the human subject. The system may include an image processing system that generates the high resolution geometry and reflectance data based on only one image from each camera.A polarizing optical element may be between each camera and the portion of the human subject. A polarizer filter may be between each light and the portion of the human subject. A controller may cause all of the cameras to simultaneously capture a single image of the portion of the human subject while the portion of the human subject is illuminated by all of the lights. The specular reflections from the portion of the human subject that are captured by one of the cameras may have a color distribution across the portion of the human subject that is different than the specular reflections from the portion of the human subject that are captured by another of the cameras.
摘要翻译： 系统可以几乎立即捕获人类对象的一部分的高分辨率几何和反射率数据。 该系统可以包括多个相机，每个相机定向成从空间中的不同位置可控地捕获人物对象的部分的图像; 多个灯，每个灯定向为可控地照射来自与其他灯的空间中的位置明显不同的空间中的人物的部分; 和控制器。 控制器可以将摄像机分成子组，每个摄像机子组包含至少一个照相机，每个照相机仅属于一个子组; 使每个摄像机子组顺序地捕获人类对象部分的单个图像; 并且使得至少一个灯点亮，而每个照相机子组拍摄人物对象的该部分的单个图像。 该系统可以包括基于来自每个相机的仅一个图像生成高分辨率几何形状和反射率数据的图像处理系统。 偏振光学元件可以在每个照相机和人类对象的部分之间。 偏振器滤光器可以在每个光和人对象的部分之间。 控制器可以使得所有摄像机同时捕获人类对象的一部分的单个图像，同时人体对象的部分被所有的灯照亮。 来自人类对象的由相机中的一个拍摄的部分的镜面反射可以具有穿过人类受试者的部分的颜色分布，该颜色分布不同于来自人类对象的部分的镜面反射，其被另一个 相机。
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公开(公告)号：US20120056994A1
公开(公告)日：2012-03-08
申请号：US13221354
申请日：2011-08-30
申请人： Graham Leslie Fyffe
发明人： Graham Leslie Fyffe
CPC分类号： G06K9/2036 , G06K9/00255 , G06K9/209 , G06T7/514 , G06T2207/10024 , H04N13/239 , H04N13/257
摘要： Single-shot photometric stereo techniques are disclosed in which chromaticity is assumed to be a variable. Scene illumination includes three or more spectrally distinct light sources. A scene image is taken with a camera system configured to measure five or more different bands, or channels, of the visible light spectrum. The light sources can include narrow-band colored LED lights, possibly combined with color filters to refine the spectral distributions. In each configuration, a beam splitter assembly is used to align two or more color cameras having different color filters placed over their lenses. By use of such techniques, a single multispectral photograph of a subject provides enough information to recover both the full-color reflectance and the surface normals on a per-pixel basis.
摘要翻译： 公开了单色光度立体声技术，其中假定色度是变量。 场景照明包括三个或更多光谱不同的光源。 采用被配置为测量可见光谱的五个或更多个不同频带或通道的相机系统拍摄场景图像。 光源可以包括窄带彩色LED灯，可能与彩色滤光片组合以细化光谱分布。 在每个配置中，分束器组件用于对准具有放置在其透镜上的不同滤色器的两个或更多个彩色相机。 通过使用这样的技术，受试者的单个多光谱照片提供了足够的信息以在每个像素的基础上恢复全色反射率和表面法线。
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