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71. 发明申请

US20070024742A1 Method and apparatus for enhancing flash and ambient images 有权
标题翻译：用于增强闪光和环境影像的方法和装置
公开(公告)号：US20070024742A1
公开(公告)日：2007-02-01
申请号：US11191809
申请日：2005-07-28
申请人： Ramesh Raskar , Amit Agrawal
发明人： Ramesh Raskar , Amit Agrawal
IPC分类号： H04N5/222
CPC分类号： H04N5/2352 , H04N5/2355
摘要： A method and system generate an enhanced output image. A first image is acquired of a scene illuminated by a first illumination condition. A second image is acquired of the scene illuminated by a second illumination condition. First and second gradient images are determined from the first and second images. Orientations of gradients in the first and second gradient images are compared to produce a combined gradient image, and an enhanced output image is constructed from the combined gradient image.
摘要翻译：方法和系统生成增强的输出图像。获取由第一照明条件照亮的场景的第一图像。获取由第二照明条件照亮的场景的第二图像。从第一和第二图像确定第一和第二梯度图像。将第一和第二梯度图像中的梯度的方向进行比较以产生组合的梯度图像，并且从组合的梯度图像构建增强的输出图像。

72. 发明授权

US07103227B2 Enhancing low quality images of naturally illuminated scenes 失效
标题翻译：增强自然照亮场景的低质量图像
公开(公告)号：US07103227B2
公开(公告)日：2006-09-05
申请号：US10392429
申请日：2003-03-19
申请人： Ramesh Raskar , Adrian Ilie , Jingi Yu
发明人： Ramesh Raskar , Adrian Ilie , Jingi Yu
IPC分类号： G06K9/40 , G06K9/68 , G06K9/00
CPC分类号： G06T5/20 , G06T5/002 , G06T5/003 , G06T5/50 , G06T7/12 , G06T7/174 , G06T11/00 , G06T15/02 , G06T2207/20192
摘要： A method enhances images of a naturally illuminated scene. First, a set of images Ii(x, y) is acquired of a scene. Each image is acquired under a different uncontrolled illumination. For each image Ii(x, y), intensity gradients ∇Ii(x, y) are determined, and each image is weighted with weights according to the intensity gradients. The weighted images are then combined to construct an enhanced image I′.
摘要翻译：一种方法可以增强自然照明场景的图像。首先，获取场景的一组图像I （x，y）。每个图像在不同的不受控照明下被采集。对于每个图像，我确定（x，y），强度梯度ξI（x，y），并且根据强度梯度对每个图像进行权重加权。然后将加权图像组合以构建增强图像I'。

73. 发明授权

US07102638B2 Reducing texture details in images 失效
标题翻译：降低图像中的纹理细节
公开(公告)号：US07102638B2
公开(公告)日：2006-09-05
申请号：US10392000
申请日：2003-03-19
申请人： Ramesh Raskar , Jingyi Yu , Adrian Ilie
发明人： Ramesh Raskar , Jingyi Yu , Adrian Ilie
IPC分类号： G09G5/02
CPC分类号： G06T11/00 , G06T15/02
摘要： A method generates an image with de-emphasized textures. Each pixel in the image is classified as either a silhouette edge pixel, a texture edge pixels, or a featureless pixel. A mask image M(x, y) is generated, wherein an intensity of a given pixel (x, y) in the mask image M(x, y) is zero if the pixel (x, y) is classified as the texture edge pixel, is d(x, y) if the pixel (x, y) is classified as the featureless pixel, and is one if the pixel (x, y) is classified as the silhouette edge pixel. An intensity gradient ∇I(x, y) is determined in the masked image, and the intensity gradients in the masked image are integrated according to G(x, y)=∇I(x, y). M(x, y). Then, an output image I′ is generated by minimizing |∇I′−G|, and normalizing the intensities in the output image I′.
摘要翻译：方法生成具有去加重纹理的图像。图像中的每个像素被分类为轮廓边缘像素，纹理边缘像素或无特征像素。生成掩模图像M（x，y），其中如果像素（x，y）被分类为纹理边缘，则掩模图像M（x，y）中的给定像素（x，y）的强度为零像素，如果像素（x，y）被分类为无特征像素，则为d（x，y），并且如果像素（x，y）被分类为轮廓边缘像素则为像素（x，y）。在掩蔽图像中确定强度梯度∇I（x，y），并根据G（x，y）=∇I（x，y）将屏蔽图像中的强度梯度积分。 M（x，y）。然后，通过最小化|∇I'-G |并且使输出图像I'的强度标准化来生成输出图像I'。

74. 发明授权

US07038185B1 Camera for directly generating a gradient image 失效
标题翻译：用于直接生成渐变图像的相机
公开(公告)号：US07038185B1
公开(公告)日：2006-05-02
申请号：US11001396
申请日：2004-12-01
申请人： Jack Tumblin , Amit Agrawal , Ramesh Raskar
发明人： Jack Tumblin , Amit Agrawal , Ramesh Raskar
IPC分类号： H01L27/00 , G01J1/42
CPC分类号： H04N5/355 , H04N5/2355 , H04N5/2621 , H04N5/335
摘要： A camera includes a set of sensing elements. Each sensing element is arranged at an image plane in an energy field to measure a magnitude and sign of a local gradient of the energy field. Each sensing element includes at least two energy intensity sensors. Each energy sensor measures a local intensity of the energy field. Logarithms of the intensities are subtracted from each other to obtain the magnitude and sign of the gradients. A Poisson equation is solved using the gradients to obtain an output image of the energy field.
摘要翻译：相机包括一组感测元件。每个感测元件被布置在能量场中的图像平面处，以测量能量场的局部梯度的幅度和符号。每个感测元件包括至少两个能量强度传感器。每个能量传感器测量能量场的局部强度。将对数的对数减去彼此以获得幅度和符号的梯度。使用梯度求解泊松方程，得到能量场的输出图像。

75. 发明授权

US07019748B2 Simulating motion of static objects in scenes 失效
公开(公告)号：US07019748B2
公开(公告)日：2006-03-28
申请号：US09930426
申请日：2001-08-15
申请人： Ramesh Raskar
发明人： Ramesh Raskar
IPC分类号： G06T13/00
CPC分类号： G06T13/20
摘要： A computer implemented method stimulates motion of a static 3D physical object in a static scene by first acquiring a 3D graphics model of the 3D physical object and the scene. A projector is registered with the 3D physical object, the scene and the 3D model. The model is then segmented into a plurality of parts, and each part is edited with graphics authoring tools to reflect a desired appearance and virtual motion of the part. The edited parts are rendered and projected, in real-time, as a video onto the 3D physical object and scene to give the 3D physical object and the scene the desired appearance and virtual motion.

76. 发明授权

US07001023B2 Method and system for calibrating projectors to arbitrarily shaped surfaces with discrete optical sensors mounted at the surfaces 失效
标题翻译：使用安装在表面的分立光学传感器将投影机校准为任意形状的表面的方法和系统
公开(公告)号：US07001023B2
公开(公告)日：2006-02-21
申请号：US10635404
申请日：2003-08-06
申请人： Johnny Chung Lee , Daniel Maynes-Aminzade , Paul H. Dietz , Ramesh Raskar
发明人： Johnny Chung Lee , Daniel Maynes-Aminzade , Paul H. Dietz , Ramesh Raskar
IPC分类号： G03B21/00 , G03B21/14 , G03B21/26 , H04N3/22 , H04N3/23
CPC分类号： H04N17/04 , H04N9/3185 , H04N9/3194
摘要： A system determines correspondence between locations on a display surface and pixels in an output image of a projector. The display surface can have an arbitrary shape and pose. Locations of known coordinates are identified on the display surface. Each location is optically coupled to a photo sensor by an optical fiber installed in a throughhole in the surface. Known calibration patterns are projected, while sensing directly an intensity of light at each location for each calibration pattern. The intensities are used to determine correspondences between the locations and pixels in an output image of the projector so that projected images can be warped to conform to the display surface.
摘要翻译：系统确定显示表面上的位置与投影仪的输出图像中的像素之间的对应关系。显示表面可以具有任意形状和姿势。已知坐标的位置在显示面上被识别。每个位置通过安装在表面上的通孔中的光纤光耦合到光传感器。已知的校准图案被投影，同时直接感测每个校准图案的每个位置处的光强度。强度用于确定投影仪的输出图像中的位置和像素之间的对应关系，使得投影图像可以翘曲以符合显示表面。

77. 发明申请

US20050254720A1 Enhanced surgical visualizations with multi-flash imaging 审中-公开
标题翻译：增强手术可视化与多闪光成像
公开(公告)号：US20050254720A1
公开(公告)日：2005-11-17
申请号：US10847069
申请日：2004-05-17
申请人： Kar-Han Tan , Ramesh Raskar , Paul Dietz
发明人： Kar-Han Tan , Ramesh Raskar , Paul Dietz
IPC分类号： G06T5/00 , H01J40/14
CPC分类号： G06T5/003 , G06T7/13 , G06T7/564 , G06T7/586 , G06T2200/04 , G06T2207/10016 , G06T2207/10068 , G06T2207/10152 , G06T2207/20192 , G06T2207/30028
摘要： A method enhances an output image of a 3D object. A set of input images are acquired of a 3D object. Each one of the input images is illuminated by a different one of a set of lights placed at different positions with respect to the 3D object. Boundaries of shadows are detected in the set of input images by comparing the set of input images. The boundaries of shadows that are closer to a direction of the set of lights are marked as depth edge pixels.
摘要翻译：一种方法增强了3D对象的输出图像。获取一组3D对象的输入图像。输入图像中的每一个被放置在相对于3D对象的不同位置的一组光中的不同的一个被照亮。通过比较输入图像的集合，在输入图像集中检测到阴影的边界。更靠近该组光的方向的阴影的边界被标记为深度边缘像素。

78. 发明授权

US06930681B2 System and method for registering multiple images with three-dimensional objects 失效
标题翻译：用三维物体登记多张图像的系统和方法
公开(公告)号：US06930681B2
公开(公告)日：2005-08-16
申请号：US09930430
申请日：2001-08-14
申请人： Ramesh Raskar , Gregory F. Welch , Kok-Lim Low
发明人： Ramesh Raskar , Gregory F. Welch , Kok-Lim Low
IPC分类号： G06T15/00
CPC分类号： G06T15/005
摘要： A computer implemented method registers an image with a 3D physical object by first acquiring a 3D graphics model of an object. Multiple 3D calibration points a surface of the object and corresponding 3D model calibration points in the 3D graphics model are identified. The object is illuminated with a calibration image using a projector at a fixed location. The calibration image is aligned with each of the 3D calibration points on the surface of the 3D physical object to identify corresponding 2D pixels in the calibration image, and then a transformation between the 2D calibration pixels and the corresponding 3D model calibration points is determined to register the projector with the 3D physical object.
摘要翻译：计算机实现的方法通过首先获取对象的3D图形模型来注册具有3D物体的图像。识别3D图形模型中多个3D校准点对象的表面和相应的3D模型校准点。使用投影仪在固定位置的校准图像照亮物体。校准图像与3D物理物体表面上的每个3D校准点对准，以识别校准图像中的相应2D像素，然后确定2D校准像素与相应的3D模型校准点之间的变换以进行注册该投影机具有3D物体。

79. 发明申请

US20050030486A1 Method and system for calibrating projectors to arbitrarily shaped surfaces with discrete optical sensors mounted at the surfaces 失效
标题翻译：使用安装在表面的分立光学传感器将投影机校准为任意形状的表面的方法和系统
公开(公告)号：US20050030486A1
公开(公告)日：2005-02-10
申请号：US10635404
申请日：2003-08-06
申请人： Johnny Lee , Daniel Maynes-Aminzade , Paul Dietz , Ramesh Raskar
发明人： Johnny Lee , Daniel Maynes-Aminzade , Paul Dietz , Ramesh Raskar
IPC分类号： G03B21/00 , G03B21/14 , H04N5/74 , H04N9/31 , H04N17/00 , H04N17/04
CPC分类号： H04N17/04 , H04N9/3185 , H04N9/3194
摘要： A system determines correspondence between locations on a display surface and pixels in an output image of a projector. The display surface can have an arbitrary shape and pose. Locations with know coordinates are identified on the display surface. Each location is optically coupled to a photo sensor by an optical fiber installed in a throughhole in the surface. Known calibration patterns are projected, while sensing directly an intensity of light at each location for each calibration pattern. The intensities are used to determine correspondences between the of locations and pixels in an output image of the projector so that projected images can warped to conform to the display surface.
摘要翻译：系统确定显示表面上的位置与投影仪的输出图像中的像素之间的对应关系。显示表面可以具有任意形状和姿势。具有知识坐标的位置在显示面上被识别。每个位置通过安装在表面上的通孔中的光纤光耦合到光传感器。已知的校准图案被投影，同时直接感测每个校准图案的每个位置处的光强度。强度用于确定投影仪的输出图像中的位置和像素之间的对应关系，使得投影图像可以翘曲以符合显示表面。

80. 发明授权

US06793350B1 Projecting warped images onto curved surfaces 有权
标题翻译：将图像投影到曲面上
公开(公告)号：US06793350B1
公开(公告)日：2004-09-21
申请号：US10458386
申请日：2003-06-10
申请人： Ramesh Raskar , Jeroen van Baar , Srinivasa G. Rao , Thomas H. Willwacher
发明人： Ramesh Raskar , Jeroen van Baar , Srinivasa G. Rao , Thomas H. Willwacher
IPC分类号： G03B2100
CPC分类号： G06T3/0081 , G03B37/04 , G06K9/2036 , G06T5/006 , H04N9/3147 , H04N9/3185 , H04N9/3194
摘要： A method projects one or more image onto a curved display surface. First, a predetermined structured light pattern is projected onto the display surface. A stereo pair of images is acquired of the projected images on the display surface. Then, a quadric transfer function between the predetermined images and the stereo pair of images, via the display surface, is determined. Thus, an arbitrary output image can be warped according to the quadric transfer function so that when it is projected onto the display surface it appears correct.
摘要翻译：一种方法将一个或多个图像投射到弯曲的显示表面上。首先，将预定的结构光图案投影到显示面上。在显示表面上获取投影图像的立体图像对。然后，通过显示表面确定预定图像和立体对图像之间的二次传递函数。因此，可以根据二次转移函数扭曲任意输出图像，使得当它被投影到显示表面上时它看起来正确。

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