公开(公告)号：US20070285422A1

公开(公告)日：2007-12-13

申请号：US11624016

申请日：2007-01-17

Applicant: Shree Nayar ,  Gurunandan Krishnan ,  Michael Grossberg ,  Ramesh Raskar

Inventor： Shree Nayar ,  Gurunandan Krishnan ,  Michael Grossberg ,  Ramesh Raskar

IPC: G06T15/50

CPC classification number: G06T15/50 ,  G06K9/4661

Abstract: A method and apparatus for determine an effect of direct and global illumination in a scene. A scene is illuminated with spatially varying illumination. A set of images is acquired of the scene, and a direct and global radiance in the set of images is determined.

Abstract translation: 一种用于确定场景中直接和全局照明效果的方法和装置。 一个场景用空间变化的照明照亮。 获取场景的一组图像，并且确定该组图像中的直接和全局辐射。

公开(公告)号：US20070268481A1

公开(公告)日：2007-11-22

申请号：US11435581

申请日：2006-05-17

Applicant: Ramesh Raskar ,  Hideaki Nii ,  Yong Zhao ,  Paul H. Dietz ,  Erich Bruns

Inventor： Ramesh Raskar ,  Hideaki Nii ,  Yong Zhao ,  Paul H. Dietz ,  Erich Bruns

IPC: G01J1/42 ,  G01N21/47

CPC classification number: G01N21/55 ,  G01J1/42 ,  G01N2021/557 ,  G06T7/73 ,  G06T2207/10016 ,  G06T2207/30204

Abstract: A system measures reflectance in a scene. A first optical sensor is configured to measure incident energy at a location in a scene. A second optical sensor is configured to measure reflected energy from the location in the scene. The incident energy and the reflected energy are analyzed to determine a photometric property at the location of the scene.

Abstract translation: 系统测量场景中的反射率。 第一光学传感器被配置成测量场景中的位置处的入射能量。 第二光学传感器被配置为测量来自场景中的位置的反射能量。 分析入射能量和反射能量以确定场景位置处的光度特性。

公开(公告)号：US20070258706A1

公开(公告)日：2007-11-08

申请号：US11429694

申请日：2006-05-08

Applicant: Ramesh Raskar ,  Jack Tumblin ,  Amit Agrawal

Inventor： Ramesh Raskar ,  Jack Tumblin ,  Amit Agrawal

IPC: G03B17/00

CPC classification number: H04N5/23248 ,  H04N5/23258 ,  H04N5/2329 ,  H04N5/2353 ,  H04N5/238

Abstract: A method and system deblurs images acquired of a scene by a camera. A light field acquired of a scene is modulated temporally according to a sequence of ons and offs. An optimal coding pattern is selected. The modulated light field is integrated by a sensor of a camera during an exposure time to generate an encoded input image. The encoded input image is decoded according to a pseudo-inverse of a smearing matrix to produce a decoded output image having a reduced blur.

Abstract translation: 方法和系统通过照相机去除场景获取的图像。 场景获取的光场根据亮度和亮度的顺序进行时间调制。 选择最佳编码模式。 调制光场在曝光时间期间由相机的传感器集成以产生编码的输入图像。 编码的输入图像根据拖尾矩阵的伪逆解码，以产生具有减小的模糊的解码输出图像。

公开(公告)号：US07252387B2

公开(公告)日：2007-08-07

申请号：US11084876

申请日：2005-03-21

Applicant: Ramesh Raskar ,  Jeroen van Baar

Inventor： Ramesh Raskar ,  Jeroen van Baar

IPC: G03B21/26 ,  H04N3/23 ,  H04N3/223 ,  H04N3/227

CPC classification number: H04N9/3194 ,  G03B21/142 ,  G03B21/147 ,  G03B37/04 ,  H04N5/74 ,  H04N9/3185

Abstract: A method adjusts a pose of a projector with respect to a display surface. A homography HD,P is determined between a display surface and a projector. The homography HD,P is decomposed into rotation and translation parameters expressing a pose MP of the projector. An ideal pose M0 of the projector corresponding to an ideal homography H0 is determined. A pose adjustment MA is determined according to MA=M0(MP)−1. The pose adjustment MA is decomposed into rotation and translation adjustment parameters. Then, the projector is adjusted mechanically to the ideal pose M0 according to the rotation and translation adjustment parameters.

Abstract translation: 一种方法调节投影仪相对于显示表面的姿态。 在显示表面和投影仪之间确定单应性H D D，P。。 单应H，D，P分解成表示投影仪姿势M P P的旋转和平移参数。 确定对应于理想单对应H 0 0的投影机的理想姿势M 0 0 。 姿势调整M A A根据M A = M 0（M P）来确定， 1 。 姿势调整M A A被分解为旋转和平移调整参数。 然后，根据旋转和平移调节参数，将投影机机械地调整到理想姿势M 0 0。

公开(公告)号：US07154395B2

公开(公告)日：2006-12-26

申请号：US10883235

申请日：2004-07-01

Applicant: Ramesh Raskar ,  Paul A. Beardsley ,  Jeroen van Baar ,  Paul H. Dietz

Inventor： Ramesh Raskar ,  Paul A. Beardsley ,  Jeroen van Baar ,  Paul H. Dietz

IPC: G08B1/08

CPC classification number: G06K19/0728 ,  G01S5/16 ,  G06K7/10079 ,  G06K19/0723

Abstract: A wireless location and identification system includes a controller and a tag. The controller has a projector configured to generate a unique temporal sequence of light intensities for each pixel in an output image of the projector and a wireless transceiver configured to emit an output signal and receive an input signal. The tag includes a photo-sensor configured to sense the unique temporal sequence of light intensities of a particular pixel, a transducer configured to receive the output signal from the transceiver, and a means for modulating, according to the unique temporal sequence of light intensities, the input signal for the transceiver in response to receiving the output signal and sensing the unique temporal sequence of light intensities of the particular pixel to indicate a location of the tag to the controller.

公开(公告)号：US20060001839A1

公开(公告)日：2006-01-05

申请号：US10883224

申请日：2004-07-01

Applicant: Paul Beardsley ,  Jeroen van Baar ,  Ramesh Raskar

Inventor： Paul Beardsley ,  Jeroen van Baar ,  Ramesh Raskar

IPC: G03B21/00

CPC classification number: H04N9/3185 ,  G03B17/54 ,  G03B21/26 ,  H04N5/74 ,  H04N9/3194

Abstract: A rigidly-coupled projector-camera system is augmented with laser pointers. The projector-camera system and lasers can be used to determine homography between the projector and a display surface, so that a projection of any desired geometry can be made on the display surface.

Abstract translation: 激光指针增强了刚性耦合的投影机相机系统。 可以使用投影仪相机系统和激光器来确定投影仪和显示表面之间的单应性，使得可以在显示表面上进行任何期望的几何形状的投影。

公开(公告)号：US20050116813A1

公开(公告)日：2005-06-02

申请号：US11030607

申请日：2005-01-06

Applicant: Ramesh Raskar

Inventor： Ramesh Raskar

IPC: G06K7/10 ,  G06K19/07 ,  H04Q5/22

CPC classification number: G06K19/0728 ,  G06K7/0004 ,  G06K7/0008 ,  G06K7/10079 ,  G06K7/1097 ,  G06K19/0723 ,  G06K19/145

Abstract: An identification tag is formed with a single microcircuit. The microcircuit includes an optical transceiver, a radio transceiver, both connected to a memory storing an identification code. At least one of the transceivers operates in receive mode, and at least one of the transceivers operates in transmit mode. The identification code is transmitted by the transceiver operating in the transmit mode in response to receiving a predetermined signal by the transceiver operating in the receive mode.

公开(公告)号：US20050068466A1

公开(公告)日：2005-03-31

申请号：US10672584

申请日：2003-09-26

Applicant: Richard Waters ,  Jay Thornton ,  Ramesh Raskar ,  Mamoru Kato ,  Paul Dietz

Inventor： Richard Waters ,  Jay Thornton ,  Ramesh Raskar ,  Mamoru Kato ,  Paul Dietz

IPC: H04N5/74 ,  H04N9/28 ,  H04N9/31 ,  H04N17/00 ,  H04N17/04

CPC classification number: H04N9/31 ,  H04N5/7408 ,  H04N9/28 ,  H04N17/04

Abstract: In a rear projection television, cathode ray tubes are mounted inside an enclosure so that each cathode ray tube projects output images onto a rear projection screen using a corresponding electron beam. Calibration images are generated for each cathode ray tube. A camera, also mounted inside the enclosure, acquires an input image of each calibration image. A distortion in each input image is measured, and the output images of the cathode ray tubes are corrected by adjusting the signals controlling the corresponding electron beams according to the distortion.

Abstract translation: 在背投电视中，阴极射线管安装在外壳内，使得每个阴极射线管使用相应的电子束将输出图像投射到背投屏幕上。 为每个阴极射线管生成校准图像。 也安装在机箱内的相机获取每个校准图像的输入图像。 测量每个输入图像中的失真，并且通过根据失真调整控制相应电子束的信号来校正阴极射线管的输出图像。

公开(公告)号：US06741248B2

公开(公告)日：2004-05-25

申请号：US09826332

申请日：2001-04-04

Applicant: Ramesh Raskar

Inventor： Ramesh Raskar

IPC: G06T1540

CPC classification number: G06T17/20 ,  G06T15/00

Abstract: A method renders a mesh constructed of polygons representing a graphics model one at the time to accentuate geometric features of the mesh. At least one additional polygon is generated at each edge of each polygon of the mesh. Each additional polygon has a predetermined orientation, size, and color. The predetermined orientation of the generated polygons is 180° with respect to the polygon if the polygon is a back-facing polygon to accentuate silhouettes. The predetermined orientation of the generated polygon is a first threshold angle with respect to the polygon if the polygon is a front-facing polygon to accentuate ridges, and the predetermined orientation of the generated polygon is a second threshold angle with respect to the polygon if the polygon is a front-facing polygon to accentuate valleys.

Abstract translation: 一种方法呈现一个由多边形构成的网格，表示一个图形模型，以强调网格的几何特征。 在网格的每个多边形的每个边缘处至少生成一个多边形。 每个附加多边形具有预定的取向，大小和颜色。 如果多边形是面向多边形以突出轮廓，则所生成的多边形的预定取向相对于多边形为180°。 如果多面体是面向多边形以突出脊的多边形，则所生成的多边形的预定取向是相对于多边形的第一阈值角，并且如果生成的多边形的预定取向相对于多边形则为第二阈值角 多边形是一个面向前的多边形，以突出山谷。

公开(公告)号：US09778363B2

公开(公告)日：2017-10-03

申请号：US14523708

申请日：2014-10-24

Applicant: Achuta Kadambi ,  Refael Whyte ,  Ayush Bhandari ,  Lee Streeter ,  Christopher Barsi ,  Adrian Dorrington ,  Ramesh Raskar

Inventor： Achuta Kadambi ,  Refael Whyte ,  Ayush Bhandari ,  Lee Streeter ,  Christopher Barsi ,  Adrian Dorrington ,  Ramesh Raskar

IPC: G01S17/89 ,  G01S17/32 ,  G01S7/491

CPC classification number: G01S17/89 ,  G01S7/4915 ,  G01S17/32

Abstract: In illustrative implementations, a time-of-flight camera robustly measures scene depths, despite multipath interference. The camera emits amplitude modulated light. An FPGA sends at least two electrical signals, the first being to control modulation of radiant power of a light source and the second being a reference signal to control modulation of pixel gain in a light sensor. These signals are identical, except for time delays. These signals comprise binary codes that are m-sequences or other broadband codes. The correlation waveform is not sinusoidal. During measurements, only one fundamental modulation frequency is used. One or more computer processors solve a linear system by deconvolution, in order to recover an environmental function. Sparse deconvolution is used if the scene has only a few objects at a finite depth. Another algorithm, such as Wiener deconvolution, is used is the scene has global illumination or a scattering media.