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15 条记录 (耗时 0.016 秒)

    Projection autofocus
    2.
    发明授权
    Projection autofocus 有权
    投影自动对焦

    公开(公告)号：US09055237B1

    公开(公告)日：2015-06-09

    申请号：US13486710

    申请日：2012-06-01

    申请人： Samuel Henry Chang ,  Weijian Wang

    发明人： Samuel Henry Chang ,  Weijian Wang

    IPC分类号： H04N9/31 ,  G03B3/10 ,  G03B21/14 ,  G03B15/14

    CPC分类号： H04N9/31 ,  G03B15/14 ,  G03B17/54 ,  G03B21/53 ,  H04N9/3185 ,  H04N9/3194

    摘要： Techniques are described for projecting content onto surfaces and for focusing the content. When content is projected by a projector onto a surface, the surface is observed by a camera or other sensor, and the contrast of the projected content is evaluated. The projector then varies its focal point to improve or maximize the observed contrast of the projected content.

    摘要翻译： 描述了将内容投影到表面上并用于聚焦内容的技术。 当内容由投影仪投影到表面上时，通过相机或其他传感器观察表面，并评估投影内容的对比度。 然后投影机改变其焦点，以改善或最大化观察到的投影内容的对比度。

    Recursive least squares approach to calculate motion parameters for a moving camera
    3.
    发明授权
    Recursive least squares approach to calculate motion parameters for a moving camera 有权
    递归最小二乘法计算运动摄像机的运动参数

    公开(公告)号：US07333133B2

    公开(公告)日：2008-02-19

    申请号：US10814711

    申请日：2004-03-31

    申请人： Samuel Henry Chang ,  J. Joseph Fuller ,  Ali Farsaie ,  Leslie Ray Elkins

    发明人： Samuel Henry Chang ,  J. Joseph Fuller ,  Ali Farsaie ,  Leslie Ray Elkins

    IPC分类号： H04N5/228 ,  H04N17/02

    CPC分类号： G06T7/246 ,  G06T7/80

    摘要： A method and system for estimating camera motion parameters and determining a filter to correct for camera motion errors. The estimating method and system includes obtaining an observation point set including a plurality of observed point vectors, computing a plurality of motion output vectors by performing a recursive least squares (RLS) process based on a plurality of motion parameter vectors, and comparing the plurality of motion output vectors to the plurality of observed point vectors. The filter determining method and system includes determining a plurality of desired motion point vectors, computing a plurality of estimated motion point vectors by means of an RLS algorithm, and computing the filter based on a difference between the plurality of estimated motion point vectors and the plurality of desired motion point vectors.

    摘要翻译： 用于估计摄像机运动参数并确定滤波器以校正摄像机运动误差的方法和系统。 所述估计方法和系统包括获得包括多个观察点向量的观测点集合，通过基于多个运动参数向量执行递归最小二乘法（RLS）处理来计算多个运动输出向量， 运动输出向量到多个观察点向量。 滤波器确定方法和系统包括确定多个期望的运动点矢量，借助RLS算法计算多个估计的运动点矢量，以及基于多个估计的运动点矢量与多个运动点矢量之间的差来计算滤波器 的所需运动点矢量。

    Edge-based pose detection
    5.
    发明授权
    Edge-based pose detection 有权
    基于边缘的姿势检测

    公开(公告)号：US09456187B1

    公开(公告)日：2016-09-27

    申请号：US13486634

    申请日：2012-06-01

    申请人： Qiang Liu ,  Samuel Henry Chang ,  Ning Yao

    发明人： Qiang Liu ,  Samuel Henry Chang ,  Ning Yao

    IPC分类号： H04N5/228 ,  H04N9/04 ,  G06F3/01 ,  H04W4/02

    CPC分类号： H04N9/045 ,  G06F3/017 ,  G06T7/75 ,  G06T17/00 ,  G06T2207/20164 ,  H04W4/02

    摘要： Techniques are described for determining the pose of a surface based on a point set representing the surface. Corner models are matched to a contour of the point set using a difference minimization technique to identify corner poses of the surface. Based on the corner poses, a virtual model of the surface is created and matched to the point set to determine the pose of the surface.

    摘要翻译： 描述了基于表示表面的点集来确定表面姿态的技术。 使用差分最小化技术将拐角模型与点集的轮廓相匹配，以识别表面的角姿势。 基于角姿势，创建表面的虚拟模型并将其与点集合相匹配，以确定曲面的姿态。

    Hand gesture detection
    7.
    发明授权
    Hand gesture detection 有权
    手势检测

    公开(公告)号：US08970479B1

    公开(公告)日：2015-03-03

    申请号：US13562734

    申请日：2012-07-31

    申请人： Samuel Henry Chang ,  Weijian Wang ,  Sowmya Gopalan ,  Ning Yao ,  Yuhua Zhu ,  Manika Puri

    发明人： Samuel Henry Chang ,  Weijian Wang ,  Sowmya Gopalan ,  Ning Yao ,  Yuhua Zhu ,  Manika Puri

    IPC分类号： G09G5/00 ,  G06F3/01

    CPC分类号： G06F3/017 ,  G06K9/00355

    摘要： Techniques are described for detecting a hand gesture made by a user. Fingertips of a hand may be identified and tracked over time. When a user contracts the fingertips from an extended position, hand spread may be calculated based on the area of the hand and fingers. The hand spread over time may be compared to a Gaussian function to evaluate whether the observed motion represents a grasping motion.

    摘要翻译： 描述了用于检测由用户做出的手势的技术。 一只手的指尖可能随时间被识别和跟踪。 当用户从伸展位置收缩指尖时，可以基于手和手指的面积来计算手伸。 随着时间推移的手可以与高斯函数进行比较，以评估观察到的运动是否表示抓握运动。

    Sound source locator with distributed microphone array
    9.
    发明授权
    Sound source locator with distributed microphone array 有权
    具有分布式麦克风阵列的声源定位器

    公开(公告)号：US09560446B1

    公开(公告)日：2017-01-31

    申请号：US13535135

    申请日：2012-06-27

    申请人： Samuel Henry Chang ,  Wai C. Chu

    发明人： Samuel Henry Chang ,  Wai C. Chu

    IPC分类号： G06F17/00 ,  H04R3/00

    CPC分类号： H04R3/005 ,  H04R1/406 ,  H04R2201/403 ,  H04R2430/20

    摘要： A sound source locator efficiently employs a distributed physical or logical microphone array to determine a location of a source of a sound. In some instances, the sound source locator is deployed in an augmented reality environment. The sound source locator detects sound at a plurality of microphones, generates a signal corresponding to the sound, and causes attributes of signal as generated at the plurality of microphones to be stored in association with the corresponding microphone. The sound source locator uses these stored attributes to identify multiple groups of the plurality of microphones from which delays between the times the signal is generated can be used to compute the location of the source of the sound.

    摘要翻译： 声源定位器有效地使用分布式物理或逻辑麦克风阵列来确定声源的位置。 在某些情况下，声源定位器部署在增强现实环境中。 声源定位器检测多个麦克风处的声音，产生对应于声音的信号，并且使与多个麦克风相关联地存储在多个麦克风处产生的信号的属性被存储。 声源定位器使用这些存储的属性来识别多个麦克风的多个组，从该信号生成的时间之间的延迟可用于计算声源的位置。