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公开(公告)号:US20140347676A1
公开(公告)日:2014-11-27
申请号:US14287811
申请日:2014-05-27
申请人: Andreas Velten , Ramesh Raskar
发明人: Andreas Velten , Ramesh Raskar
CPC分类号: G01B11/002 , G01B11/2513 , G01J3/021 , G01J3/027 , G01J3/10 , G01J3/42 , G01N21/255 , G01N21/27 , G01N21/55 , G01N21/64 , G01N21/6456 , G01N2021/3129 , G01N2021/6417 , G01N2201/061
摘要: An active imaging system, which includes a light source and light sensor, generates structured illumination. The light sensor captures transient light response data regarding reflections of light emitted by the light source. The transient light response data is wavelength-resolved. One or more processors process the transient light response data and data regarding the structured illumination to calculate a reflectance spectra map of an occluded surface. The processors also compute a 3D geometry of the occluded surface.
摘要翻译: 包括光源和光传感器的主动成像系统产生结构化照明。 光传感器捕获关于光源发射的光的反射的瞬态光响应数据。 瞬态光响应数据经波长分辨。 一个或多个处理器处理关于结构化照明的瞬态光响应数据和数据,以计算遮挡表面的反射光谱图。 处理器还计算封闭表面的3D几何形状。
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公开(公告)号:US20120140131A1
公开(公告)日:2012-06-07
申请号:US13309535
申请日:2011-12-01
申请人: Douglas Lanman , Matthew Hirsch , Yun Hee Kim , Szymon Jakubczak , Ramesh Raskar
发明人: Douglas Lanman , Matthew Hirsch , Yun Hee Kim , Szymon Jakubczak , Ramesh Raskar
IPC分类号: G02F1/1333 , G02B27/22 , G02F1/01
CPC分类号: G02B27/2214 , G02B27/225 , G02B27/2264 , H04N13/307 , H04N13/315 , H04N13/32
摘要: In exemplary implementations of this invention, two LCD screens display a multi-view 3D image that has both horizontal and vertical parallax, and that does not require a viewer to wear any special glasses. Each pixel in the LCDs can take on any value: the pixel can be opaque, transparent, or any shade between. For regions of the image that are adjacent to a step function (e.g., a depth discontinuity) and not adjacent to a sharp corner, the screens display local parallax barriers comprising many small slits. The barriers and the slits tend to be oriented perpendicular to the local angular gradient of the target light field. In some implementations, the display is optimized to seek to minimize the Euclidian distance between the desired light field and the actual light field that is produced. Weighted, non-negative matrix factorization (NMF) is used for this optimization.
摘要翻译: 在本发明的示例性实施方案中,两个LCD屏幕显示具有水平和垂直视差的多视图3D图像,并且不需要观看者佩戴任何特殊眼镜。 LCD中的每个像素可以承担任何值:像素可以是不透明的,透明的或任何阴影之间。 对于邻近阶梯函数(例如,深度不连续)并且不与锐角相邻的图像的区域,屏幕显示包括许多小缝隙的局部视差屏障。 障碍物和狭缝倾向于垂直于目标光场的局部角度梯度取向。 在一些实施方案中,显示器被优化以寻求使期望的光场和所产生的实际光场之间的欧几里德距离最小化。 加权非负矩阵因子分解(NMF)用于此优化。
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公开(公告)号:US20100265386A1
公开(公告)日:2010-10-21
申请号:US12826868
申请日:2010-06-30
申请人: Ramesh Raskar , Amit K. Agrawal
发明人: Ramesh Raskar , Amit K. Agrawal
IPC分类号: H04N5/225
CPC分类号: G02B27/0075
摘要: A camera acquires a 4D light field of a scene. The camera includes a lens and sensor. A mask is arranged in a straight optical path between the lens and the sensor. The mask including an attenuation pattern to spatially modulate the 4D light field acquired of the scene by the sensor. The pattern has a low spatial frequency when the mask is arranged near the lens, and a high spatial frequency when the mask is arranged near the sensor.
摘要翻译: 相机获取场景的4D光场。 相机包括镜头和传感器。 掩模布置在透镜和传感器之间的直线光路中。 掩模包括用于空间调制由传感器获取的场景的4D光场的衰减图案。 当掩模布置在透镜附近时,图案具有低空间频率,当掩模布置在传感器附近时,该图案具有高的空间频率。
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公开(公告)号:US07792423B2
公开(公告)日:2010-09-07
申请号:US11671701
申请日:2007-02-06
申请人: Ramesh Raskar , Amit Kumar Agrawal
发明人: Ramesh Raskar , Amit Kumar Agrawal
IPC分类号: G03B13/00
CPC分类号: G02B27/0075
摘要: A camera acquires a 4D light field of a scene. The camera includes a lens and sensor. A mask is arranged in a straight optical path between the lens and the sensor. The mask including an attenuation pattern to spatially modulate the 4D light field acquired of the scene by the sensor. The pattern has a low spatial frequency when the mask is arranged near the lens, and a high spatial frequency when the mask is arranged near the sensor.
摘要翻译: 相机获取场景的4D光场。 相机包括镜头和传感器。 掩模布置在透镜和传感器之间的直线光路中。 掩模包括用于空间调制由传感器获取的场景的4D光场的衰减图案。 当掩模布置在透镜附近时,图案具有低空间频率,当掩模布置在传感器附近时,该图案具有高的空间频率。
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公开(公告)号:US20090273843A1
公开(公告)日:2009-11-05
申请号:US12113359
申请日:2008-05-01
申请人: Ramesh Raskar , Cyrus A. Wilson , Amit K. Agrawal
发明人: Ramesh Raskar , Cyrus A. Wilson , Amit K. Agrawal
CPC分类号: G02B27/0018 , H04N5/2171 , H04N5/2254 , H04N5/3572 , H04N17/002
摘要: Glare is reduced by acquiring an input image with a camera having a lens and a sensor, in which a pin-hole mask is placed in close proximity to the sensor. The mask localizes the glare at readily identifiable pixels, which can then be filtered to produce a glare reduce output image.
摘要翻译: 通过用具有透镜和传感器的相机获取输入图像来减少眩光,其中将针孔掩模放置在靠近传感器的位置。 掩模将容易识别的像素的眩光定位,然后可以对其进行滤波以产生眩光减少输出图像。
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公开(公告)号:US20090201498A1
公开(公告)日:2009-08-13
申请号:US12028944
申请日:2008-02-11
申请人: Ramesh Raskar , Ankit Mohan , Jack Tumblin
发明人: Ramesh Raskar , Ankit Mohan , Jack Tumblin
IPC分类号: G01J3/04
CPC分类号: G01J3/02 , G01J3/0208 , G01J3/0213 , G01J3/0229 , G01J3/0297 , G01J3/18 , G01J2003/1286 , G03B15/08 , G03B19/16 , G03B21/005 , G03B33/16 , G03B35/20 , H04N9/045 , H04N9/3158 , H04N9/67 , H04N13/324 , H04N13/334 , H04N2209/043
摘要: An optical system performs agile spectrum imaging. The system includes a first lens for focusing light from a light source. The focused light is dispersed over a spectrum of wavelengths. A second lens focuses the dispersed light onto a mask. The mask selectively attenuates the wavelengths of the spectrum of the light source onto an image plane of the light destination. Depending on the arrangement of the light source and destination, the system can act as a 2. The apparatus of claim 1, in which the light source is a scene and the light destination is sensor, and the apparatus operates as an agile spectrum camera, viewer, spectrum projector, or light source. The arrangement can also be combined to provide a stereo vision system.
摘要翻译: 光学系统执行敏捷光谱成像。 该系统包括用于聚焦来自光源的光的第一透镜。 聚焦的光被分散在一束波长上。 第二个透镜将分散的光聚焦到掩模上。 掩模选择性地将光源的光谱的波长衰减到光目的地的图像平面上。 根据光源和目的地的布置,系统可以充当2.如权利要求1所述的装置,其中所述光源是场景,所述光目的地是传感器,并且所述设备作为敏捷光谱摄像机操作, 观看者,频谱投影仪或光源。 该装置也可以组合以提供立体视觉系统。
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公开(公告)号:US07421111B2
公开(公告)日:2008-09-02
申请号:US10704098
申请日:2003-11-07
IPC分类号: G06K9/00
CPC分类号: G06F3/0321 , G06F3/03542
摘要: An interactive display system includes a pixel-based display surface and a light pen. A sequence of patterns is projected onto the display surface. The sequence of patterns has a unique sequence of light intensities for each location of the display surface. Intensities of light at an arbitrary location are sensed by the light pen while projecting the sequence of patterns. The intensifies of light are decoded to determine coordinates of the arbitrary location.
摘要翻译: 交互式显示系统包括基于像素的显示表面和光笔。 图案序列被投影到显示表面上。 图案的序列对于显示表面的每个位置具有唯一的光强度序列。 在任意位置处的光的强度由光笔感测,同时投影图案序列。 光的强化被解码以确定任意位置的坐标。
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公开(公告)号:US20080187305A1
公开(公告)日:2008-08-07
申请号:US11671701
申请日:2007-02-06
申请人: Ramesh Raskar , Amit Kumar Agrawal
发明人: Ramesh Raskar , Amit Kumar Agrawal
IPC分类号: G03B7/099
CPC分类号: G02B27/0075
摘要: A camera acquires a 4D light field of a scene. The camera includes a lens and sensor. A mask is arranged in a straight optical path between the lens and the sensor. The mask including an attenuation pattern to spatially modulate the 4D light field acquired of the scene by the sensor. The pattern has a low spatial frequency when the mask is arranged near the lens, and a high spatial frequency when the mask is arranged near the sensor.
摘要翻译: 相机获取场景的4D光场。 相机包括镜头和传感器。 掩模布置在透镜和传感器之间的直线光路中。 掩模包括用于空间调制由传感器获取的场景的4D光场的衰减图案。 当掩模布置在透镜附近时,图案具有低空间频率,当掩模布置在传感器附近时,该图案具有高的空间频率。
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公开(公告)号:US07292269B2
公开(公告)日:2007-11-06
申请号:US10412178
申请日:2003-04-11
IPC分类号: G03B21/56
CPC分类号: H04N5/74 , G06F3/011 , G06T19/006
摘要: A method displays an output image on an object. A set of unique markers are fixed to the object at predetermined locations. An input image of the object and the markers is acquired with a camera in a fixed physical relationship to a projector. A pose of the projector with respect to the markers is determined from the image. Then, one or more output images related to the object can be projected onto the object, at predetermine locations, according to the pose of the projector and the unique markers.
摘要翻译: 一种方法在对象上显示输出图像。 一组独特的标记在预定位置固定到对象。 使用与投影仪的固定物理关系的相机获取对象和标记的输入图像。 根据图像确定投影仪相对于标记的姿态。 然后,根据投影机的姿态和独特的标记,可以在预先确定的位置将与对象相关的一个或多个输出图像投影到对象上。
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公开(公告)号:US07242818B2
公开(公告)日:2007-07-10
申请号:US10346442
申请日:2003-01-17
申请人: Paul A. Beardsley , Ramesh Raskar , Vaibhav Vaish
发明人: Paul A. Beardsley , Ramesh Raskar , Vaibhav Vaish
IPC分类号: G06K9/36
CPC分类号: G06K9/209 , G06K9/2036 , G06T7/73 , H04N5/74 , H04N9/3185 , H04N9/3194
摘要: A position and orientation of a projector are determined from projected images. First, a homography between a camera and a planar surface, where the relationship between the camera and planar surface is fixed, is determined. Next, a known pattern is projected on the planar surface with a projector having known intrinsic parameters and an unknown position and orientation. An image of the known pattern is acquired with the camera, and a position and orientation of the projector is determined from the image using the homography and the intrinsic parameters.
摘要翻译: 从投影图像确定投影仪的位置和方向。 首先,确定相机与平面之间的关系固定在相机和平面之间的单应性。 接下来,已知的图案用具有已知固有参数和未知位置和取向的投影仪投影在平面上。 使用相机获取已知图案的图像,并且使用单应性和内在参数从图像确定投影仪的位置和取向。
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