Near Eye Tool for Refractive Assessment
    61.
    发明申请
    Near Eye Tool for Refractive Assessment 有权
    近眼眼工具进行折射评估

    公开(公告)号:US20130027668A1

    公开(公告)日:2013-01-31

    申请号:US13577880

    申请日:2011-04-22

    IPC分类号: A61B3/032 A61B3/09

    CPC分类号: A61B3/032

    摘要: In exemplary implementations, this invention is a tool for subjective assessment of the visual acuity of a human eye. A microlens or pinhole array is placed over a high-resolution display. The eye is brought very near to the device. Patterns are displayed on the screen under some of the lenslets or pinholes. Using interactive software, a user causes the patterns that the eye sees to appear to be aligned. The software allows the user to move the apparent position of the patterns. This apparent motion is achieved by pre-warping the position and angle of the ray-bundles exiting the lenslet display. As the user aligns the apparent position of the patterns, the amount of pre-warping varies. The amount of pre-warping required in order for the user to see what appears to be a single, aligned pattern indicates the lens aberration of the eye.

    摘要翻译: 在示例性实施方式中,本发明是用于主观评估人眼视力的工具。 微透镜或针孔阵列放置在高分辨率显示器上。 眼睛非常靠近设备。 图案显示在屏幕上的一些小透镜或针孔下。 使用交互式软件,用户会使眼睛看到的图案对齐。 该软件允许用户移动图案的明显位置。 这种明显的运动是通过预处理离开小透镜显示器的射线束的位置和角度来实现的。 当用户对准图案的表观位置时,预​​翘曲的量变化。 为了使用户看到似乎是单个对齐的图案所需的预翘曲量指示眼睛的镜片像差。

    Methods and apparatus for estimation of motion and size of non-line-of-sight objects
    62.
    发明申请
    Methods and apparatus for estimation of motion and size of non-line-of-sight objects 有权
    用于估计非视距物体的运动和尺寸的方法和装置

    公开(公告)号:US20120300062A1

    公开(公告)日:2012-11-29

    申请号:US13479185

    申请日:2012-05-23

    IPC分类号: H04N7/18

    CPC分类号: G01S17/58 G01S17/89

    摘要: In exemplary implementations of this invention, a time of flight camera (ToF camera) can estimate the location, motion and size of a hidden moving object, even though (a) the hidden object cannot be seen directly (or through mirrors) from the vantage point of the ToF camera (including the camera's illumination source and sensor), and (b) the object is in a visually cluttered environment. The hidden object is a NLOS (non-line-of-sight) object. The time of flight camera comprises a streak camera and a laser. In these exemplary implementations, the motion and absolute locations of NLOS moving objects in cluttered environments can be estimated through tertiary reflections of pulsed illumination, using relative time differences of arrival at an array of receivers. Also, the size of NLOS moving objects can be estimated by backprojecting extremas of NLOS moving object time responses.

    摘要翻译: 在本发明的示例性实施方式中,飞行时间相机(ToF相机)可以估计隐藏的移动物体的位置,运动和尺寸,即使(a)从有利位置看不到直接(或通过反射镜)隐藏的物体 ToF相机(包括相机的照明源和传感器)的点,(b)物体在视觉上混乱的环境中。 隐藏的对象是一个NLOS(非视距)对象。 飞行时间相机包括条纹相机和激光。 在这些示例性实施方案中,可以使用到达接收器阵列的相对时间差,通过脉冲照明的三次反射来估计NLOS移动物体在杂乱环境中的运动和绝对位置。 此外,NLOS移动对象的大小可以通过反向投影NLOS移动对象时间响应的极值来估计。

    Methods and Apparatus for Direct-Global Separation of Light Using Angular Filtering
    63.
    发明申请
    Methods and Apparatus for Direct-Global Separation of Light Using Angular Filtering 有权
    使用角度滤波直接全局分离光的方法和装置

    公开(公告)号:US20110191073A1

    公开(公告)日:2011-08-04

    申请号:US12700654

    申请日:2010-02-04

    摘要: In an exemplary implementation of this invention, light from a scattering scene passes through a spatial light attenuation pattern and strikes a sensor plane of a camera. Based on said camera's measurements of the received light, a processing unit calculates angular samples of the received light. Light that strikes the sensor plane at certain angles comprises both scattered and directly transmitted components; whereas light that strikes at other angles comprises solely scattered light. A processing unit calculates a polynomial model for the intensity of scattered-only light that falls at the latter angles, and further estimates the direct-only component of the light that falls at the former angles. Further, a processing unit may use the estimated direct component to calculate a reconstructed 3D shape, such as a 3D shape of a finger vein pattern, using an algebraic reconstruction technique.

    摘要翻译: 在本发明的示例性实施方式中,来自散射场景的光通过空间光衰减图案并撞击照相机的传感器平面。 基于所述相机对所接收的光的测量,处理单元计算所接收的光的角度样本。 以某一角度撞击传感器平面的光包括散射和直接传输的部件; 而以其他角度撞击的光仅包括散射光。 处理单元计算以后角度落下的散射光强度的多项式模型,并且进一步估计以前一角度落下的光的直接分量。 此外,处理单元可以使用估计的直接分量来使用代数重建技术来计算重建的3D形状,例如手指静脉图案的3D形状。

    Method and System for Locating and Picking Objects Using Active Illumination
    65.
    发明申请
    Method and System for Locating and Picking Objects Using Active Illumination 有权
    使用主动照明定位和拾取物体的方法和系统

    公开(公告)号:US20090116728A1

    公开(公告)日:2009-05-07

    申请号:US11936416

    申请日:2007-11-07

    IPC分类号: G06K9/00

    摘要: A method and system determines a 3D pose of an object in a scene. Depth edges are determined from a set of images acquired of a scene including multiple objects while varying illumination in the scene. The depth edges are linked to form contours. The images are segmented into regions according to the contours. An occlusion graph is constructed using the regions. The occlusion graph includes a source node representing an unoccluded region of an unoccluded object in scene. The contour associated with the unoccluded region is compared with a set of silhouettes of the objects, in which each silhouette has a known pose. The known pose of a best matching silhouette is selected as the pose of the unoccluded object.

    摘要翻译: 方法和系统确定场景中对象的3D姿态。 深度边缘由在场景中改变照明的包括多个对象的场景获取的一组图像确定。 连接深度边缘以形成轮廓。 根据轮廓将图像分割成多个区域。 使用这些区域构建闭塞图。 闭塞图包括表示场景中未被占用对象的未被占领区域的源节点。 将与未被占领区域相关联的轮廓与对象的一组轮廓进行比较,其中每个轮廓具有已知姿势。 选择最佳匹配轮廓的已知姿势作为未被占用对象的姿势。

    Method and apparatus for deblurring images
    66.
    发明申请
    Method and apparatus for deblurring images 有权
    去除图像的方法和装置

    公开(公告)号:US20070258707A1

    公开(公告)日:2007-11-08

    申请号:US11430233

    申请日:2006-05-08

    申请人: Ramesh Raskar

    发明人: Ramesh Raskar

    IPC分类号: G03B17/00

    摘要: 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. 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.

    摘要翻译: 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。 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。

    Detecting silhouette edges in images
    67.
    发明授权
    Detecting silhouette edges in images 失效
    检测图像中的轮廓边缘

    公开(公告)号:US07206449B2

    公开(公告)日:2007-04-17

    申请号:US10391999

    申请日:2003-03-19

    摘要: A method detects silhouette edges in images. An ambient image is acquired of a scene with ambient light. A set of illuminated images is also acquired of the scene. Each illuminated image is acquired with a different light source illuminating the scene. The ambient image is combined with the set of illuminated to detect cast shadows, and silhouette edge pixels are located from the cast shadows.

    摘要翻译: 一种方法检测图像中的轮廓边缘。 用环境光获取场景的环境图像。 还拍摄了一组照明图像。 用照亮场景的不同光源获取每个照明图像。 环境图像与照明的组合组合以检测投射阴影,并且轮廓边缘像素位于投射阴影处。

    Method and apparatus for enhancing flash and ambient images
    69.
    发明申请
    Method and apparatus for enhancing flash and ambient images 有权
    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

    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。

    Enhancing low quality images of naturally illuminated scenes
    70.
    发明授权
    Enhancing low quality images of naturally illuminated scenes 失效
    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

    IPC分类号: G06K9/40 G06K9/68 G06K9/00

    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'。