公开(公告)号：US20080187305A1

公开(公告)日：2008-08-07

申请号：US11671701

申请日：2007-02-06

Applicant: Ramesh Raskar ,  Amit Kumar Agrawal

Inventor： Ramesh Raskar ,  Amit Kumar Agrawal

IPC: G03B7/099

CPC classification number: G02B27/0075

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US20070268366A1

公开(公告)日：2007-11-22

申请号：US11495946

申请日：2006-07-28

Applicant: Ramesh Raskar ,  Hideaki Nii

Inventor： Ramesh Raskar ,  Hideaki Nii

IPC: H04N7/18 ,  H04N5/33

CPC classification number: G01J1/42 ,  G01N21/55 ,  G01N2021/557 ,  G01S5/16 ,  G06K9/2036 ,  G06K9/3216 ,  G06K2009/3225 ,  G06T7/73 ,  G06T2207/10016 ,  G06T2207/30204 ,  H04N5/222 ,  H04N5/2256 ,  H04N5/33

Abstract: An optical emitter and an optical sensor are arranged at locations in a scene. A physical mask is arranged between the emitter and sensor to modulate directional electromagnetic signals from the emitter spatially. The modulated signals are analyzed to determine geometric properties at the location in the scene.

Abstract translation: 光发射器和光学传感器布置在场景中的位置处。 在发射器和传感器之间布置物理掩模，以调制来自发射器的定向电磁信号在空间上。 分析调制信号以确定场景中位置的几何特性。

公开(公告)号：US07292269B2

公开(公告)日：2007-11-06

申请号：US10412178

申请日：2003-04-11

Applicant: Ramesh Raskar ,  Clifton L. Forlines ,  Paul A. Beardsley

Inventor： Ramesh Raskar ,  Clifton L. Forlines ,  Paul A. Beardsley

IPC: G03B21/56

CPC classification number: H04N5/74 ,  G06F3/011 ,  G06T19/006

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07242818B2

公开(公告)日：2007-07-10

申请号：US10346442

申请日：2003-01-17

Applicant: Paul A. Beardsley ,  Ramesh Raskar ,  Vaibhav Vaish

Inventor： Paul A. Beardsley ,  Ramesh Raskar ,  Vaibhav Vaish

IPC: G06K9/36

CPC classification number: G06K9/209 ,  G06K9/2036 ,  G06T7/73 ,  H04N5/74 ,  H04N9/3185 ,  H04N9/3194

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07229023B2

公开(公告)日：2007-06-12

申请号：US10643614

申请日：2003-08-19

Applicant: Ramesh Raskar

Inventor： Ramesh Raskar

IPC: G06K19/06 ,  G06K7/08

CPC classification number: G06K19/0728 ,  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.

Abstract translation: 识别标签用单个微电路形成。 微电路包括光收发器，无线电收发器，两者均连接到存储识别码的存储器。 收发器中的至少一个以接收模式操作，并且至少一个收发器以发送模式工作。 响应于以接收模式操作的收发机接收到预定信号，识别码由发射模式工作的收发器发送。

公开(公告)号：US07218792B2

公开(公告)日：2007-05-15

申请号：US10392067

申请日：2003-03-19

Applicant: Ramesh Raskar ,  Jingyi Yu

Inventor： Ramesh Raskar ,  Jingyi Yu

IPC: G06K9/40 ,  G06K9/48 ,  G06K9/62 ,  G09G5/00

CPC classification number: H04N5/2625 ,  G06T15/02 ,  H04N5/2256

Abstract: A method generates a stylized image. First, a set of images is acquired of a scene. Each image is acquired under a different lighting condition. Silhouette edges are detected in the set of images. Texture regions are identified in the set of images according to the silhouette edges, and an output image is generated from a combination of the set of images wherein the silhouette edges and the texture regions are altered so as to enhance or de-emphasize selected details.

Abstract translation: 方法生成风格化图像。 首先，获取一组场景的图像。 每个图像在不同的照明条件下被采集。 在图像集中检测到轮廓边缘。 根据轮廓边缘在图像组中识别纹理区域，并且从图像组合的组合生成输出图像，其中轮廓边缘和纹理区域被改变以增强或去强调所选择的细节。

公开(公告)号：US20070025720A1

公开(公告)日：2007-02-01

申请号：US11191681

申请日：2005-07-28

Applicant: Ramesh Raskar ,  Amit Agrawal ,  Shree Nayar ,  Yuanzhen Li

Inventor： Ramesh Raskar ,  Amit Agrawal ,  Shree Nayar ,  Yuanzhen Li

IPC: G03B7/00

CPC classification number: G03B7/16 ,  G03B7/28 ,  G06K9/4661 ,  G06T5/008 ,  G06T5/50 ,  H04N5/2352

Abstract: A camera is configured to adaptively determine camera settings. The camera includes a plurality of sensors elements configured to acquire a current image of a scene according to a current set of camera settings. A number of sensor elements having a set of desirable properties is measured. Then, a next set of camera settings that maximize an overall number of sensor elements having the set of desirable properties is determined to acquire a next better image.

Abstract translation: 相机配置为自适应地确定相机设置。 相机包括多个传感器元件，其被配置为根据当前的相机设置集获取场景的当前图像。 测量具有一组所需特性的多个传感器元件。 然后，确定最大化具有所述一组所需属性的传感器元件的总数的下一组相机设置以获取下一更好的图像。

公开(公告)号：US06811264B2

公开(公告)日：2004-11-02

申请号：US10394314

申请日：2003-03-21

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

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

IPC: G03B2114

CPC classification number: G06T3/0081 ,  G03B37/04 ,  G06K9/2036 ,  G06T5/006 ,  H04N9/3147 ,  H04N9/3185 ,  H04N9/3194

Abstract: An apparatus for projecting an output image on a display surface includes a processing unit. The processing unit includes a microprocessor, a memory and an I/O interface connected by buses. A projector sub-system coupled to the processing unit is for display output images on the display surface. A camera sub-system couple to the processing unit is for acquiring input images reflecting a geometry of the display surface. The camera sub-system is in a fixed physical relationship to the projector sub-system. Internal sensors coupled to the processing unit are for determining an orientation of the projector sub-system and the camera sub-system with respect to the display surface.

Abstract translation: 用于在显示表面上投影输出图像的装置包括处理单元。 处理单元包括微处理器，存储器和通过总线连接的I / O接口。 耦合到处理单元的投影仪子系统用于在显示表面上显示输出图像。 耦合到处理单元的相机子系统用于获取反映显示表面几何形状的输入图像。 相机子系统与投影机子系统处于固定的物理关系。 耦合到处理单元的内部传感器用于确定投影仪子系统和相机子系统相对于显示表面的取向。

公开(公告)号：US06729733B1

公开(公告)日：2004-05-04

申请号：US10394684

申请日：2003-03-21

Applicant: Ramesh Raskar ,  Thomas H. Willwacher ,  Jeroen van Baar

Inventor： Ramesh Raskar ,  Thomas H. Willwacher ,  Jeroen van Baar

IPC: G03B2100

CPC classification number: H04N9/3147 ,  H04N5/74 ,  H04N9/12 ,  H04N9/3185 ,  H04N9/3194

Abstract: A method determines a largest rectangle on a display surface. A polygon L is drawn on a first depth plane having a depth z=1 in a depth buffer. A rectangle R is drawn with a predetermined aspect ratio on a second depth plane having a depth z=0. A center of projection is determined with a minimum depth z in a range [0,1] that maps the rectangle R into a largest rectangle S in the first depth plane so that the rectangle S remains completely inside the polygon L.

Abstract translation: 方法确定显示表面上的最大矩形。 多边形L在深度缓冲器中在具有深度z = 1的第一深度平面上绘制。 在深度为z = 0的第二深度平面上以预定的纵横比绘制矩形R. 确定投影中心的最小深度z在[...]的范围内，将矩形R映射到第一深度平面中的最大矩形S，使矩形S完全保留在多边形L的内部。

公开(公告)号：US06520647B2

公开(公告)日：2003-02-18

申请号：US09930532

申请日：2001-08-15

Applicant: Ramesh Raskar

Inventor： Ramesh Raskar

IPC: G03B2114

CPC classification number: H04N9/3185 ,  G03B21/00 ,  H04N9/3194

Abstract: A method corrects keystoning in a projector arbitrarily oriented with respect to a display surface. An elevation angle, a roll angle, and an azimuth angle of an optical axis of the projector are measured with respect to the display surface. A planar projective transformation matrix is determined from the elevation, roll, and azimuth angles. A source image to be projected by the projector is warped according to the planar projective transformation, and then projected onto the display surface.