利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

99 条记录 (耗时 0.021 秒)

    System and Methods for Shape Measurement Using Dual Frequency Fringe Patterns
    5.
    发明申请
    System and Methods for Shape Measurement Using Dual Frequency Fringe Patterns 审中-公开
    使用双频边缘图案进行形状测量的系统和方法

    公开(公告)号：US20160094830A1

    公开(公告)日：2016-03-31

    申请号：US14866245

    申请日：2015-09-25

    申请人： Brown University

    发明人： Gabriel Taubin ,  Daniel Moreno

    IPC分类号： H04N13/00 ,  G06T7/00 ,  G06T17/00 ,  H04N13/02

    CPC分类号： G01B11/2536 ,  G06T7/521

    摘要： A method obtains the shape of a target by projecting and recording images of dual frequency fringe patterns. Locations in each projector image plane are encoded into the patterns and projected onto die target while images are recorded. The resulting images show the patterns superimposed onto the target. The images are decoded to recover relative phase values for the patterns primary and dual frequencies. The relative phases are unwrapped into absolute phases and converted back to projector image plane locations. The relation between camera pixels and decoded projector locations is saved as a correspondence image representing the measured shape of the target. Correspondence images with a geometric triangulation method create a 3D model of the target. Dual frequency hinge patterns have a low frequency embedded into a high frequency sinusoidal, both frequencies are recovered in closed form by the decoding method, thus, enabling direct phase unwrapping.

    摘要翻译： 方法通过投影和记录双频边缘图案的图像来获得目标的形状。 每个投影机图像平面中的位置被编码为图案并且在记录图像时投影到裸片上。 所得到的图像显示叠加在目标上的图案。 图像被解码以恢复模式主要和双重频率的相对相位值。 相对相位展开为绝对相位并转换回投影机图像平面位置。 相机像素与解码的投影仪位置之间的关系被保存为表示目标的测量形状的对应图像。 具有几何三角测量方法的对应图像创建目标的3D模型。 双频铰链图案具有嵌入高频正弦曲线的低频，通过解码方法将两个频率以闭合形式恢复，从而实现直接相位展开。

    SYSTEMS, METHODS, AND MEDIA FOR PERFORMING SHAPE MEASUREMENT
    6.
    发明申请
    SYSTEMS, METHODS, AND MEDIA FOR PERFORMING SHAPE MEASUREMENT 有权
    用于执行形状测量的系统，方法和媒体

    公开(公告)号：US20150176982A1

    公开(公告)日：2015-06-25

    申请号：US14621068

    申请日：2015-02-12

    申请人： The Trustees of Columbia University in the City of New York

    发明人： Mohit Gupta ,  Shree K. Nayar

    IPC分类号： G01B11/25 ,  G06K9/46

    CPC分类号： G01B11/2536 ,  G01B11/254 ,  G06K9/4661

    摘要： Systems, methods, and media for performing shape measurement are provided. In some embodiments, systems for performing shape measurement are provided, the systems comprising: a projector that projects onto a scene a plurality of illumination patterns, wherein each of the illumination patterns has a given frequency, each of the illumination patterns is projected onto the scene during a separate period of time, three different illumination patterns are projected with a first given frequency, and only one or two different illumination patterns are projected with a second given frequency; a camera that detects an image of the scene during each of the plurality of periods of time; and a hardware processor that is configured to: determine the given frequencies of the plurality of illumination patterns; and measure a shape of an object in the scene.

    摘要翻译： 提供了用于进行形状测量的系统，方法和介质。 在一些实施例中，提供了用于执行形状测量的系统，所述系统包括：投影仪，其向场景投射多个照明图案，其中每个照明图案具有给定的频率，每个照明图案被投影到场景 在单独的时间段期间，以第一给定频率投影三种不同的照明图案，并且仅以一个或两个不同的照明图案以第二给定频率投影; 在所述多个时间段中的每一个期间检测所述场景的图像的相机; 以及硬件处理器，其被配置为：确定所述多个照明图案的给定频率; 并测量场景中物体的形状。

    Three-dimensional measurement apparatus, three-dimensional measurement method, and storage medium
    7.
    发明授权
    Three-dimensional measurement apparatus, three-dimensional measurement method, and storage medium 有权
    三维测量装置，三维测量方法和存储介质

    公开(公告)号：US08970853B2

    公开(公告)日：2015-03-03

    申请号：US13702360

    申请日：2011-06-09

    申请人： Shiki Takabayashi ,  Tetsuri Sonoda

    发明人： Shiki Takabayashi ,  Tetsuri Sonoda

    IPC分类号： G01B11/25 ,  H04N7/18

    CPC分类号： G01B11/25 ,  G01B11/2536 ,  H04N7/18

    摘要： A three-dimensional measurement apparatus for calculating three-dimensional shape information of a target object, comprising: capturing means for capturing reflected pattern light of stripe pattern light formed by alternately arranging a bright portion and a dark portion as first image data, and capturing reflected pattern light of reversed stripe pattern light formed by reversing the bright portion and the dark portion of the stripe pattern light as second image data; determination means for determining a boundary position between the bright portion and the dark portion based on the first image data and the second image data; and reliability calculation means for calculating a reliability indicating accuracy of the boundary position from a correlation between a first luminance gradient of the first image data and a second luminance gradient of the second image data.

    摘要翻译： 一种用于计算目标物体的三维形状信息的三维测量装置，包括：捕获装置，用于捕获通过交替布置亮部和暗部而形成的条纹图案光的反射图案光作为第一图像数据，并且捕获反射 通过将条形图案光的亮部和暗部反转而形成的反转条纹图案光的图案光作为第二图像数据; 确定装置，用于基于第一图像数据和第二图像数据确定亮部和暗部之间的边界位置; 以及可靠性计算装置，用于根据第一图像数据的第一亮度梯度和第二图像数据的第二亮度梯度之间的相关性计算出边界位置的精度的可靠性。

    Three-dimensional measurement apparatus, method for three-dimensional measurement, and computer program
    8.
    发明授权
    Three-dimensional measurement apparatus, method for three-dimensional measurement, and computer program 有权
    三维测量装置，三维测量方法和计算机程序

    公开(公告)号：US08964189B2

    公开(公告)日：2015-02-24

    申请号：US13817410

    申请日：2011-08-05

    申请人： Hiroyuki Ohsawa

    发明人： Hiroyuki Ohsawa

    IPC分类号： G01B11/24 ,  G01B11/25 ,  G06T7/00

    CPC分类号： G01B11/25 ,  G01B11/2536 ,  G06T7/521

    摘要： On the basis of captured images at the time of projecting multiple-frequency slit-shaped light patterns having no overlapping edge positions onto an object, the edge portions of the slit-shaped light patterns are identified. When the edge portions overlap in the captured images of two or more slit-shaped light patterns, the reliability of the computed distance values of the positions corresponding to the edges is lowered.

    摘要翻译： 基于在将不具有重叠边缘位置的多频率狭缝状光图案投影到物体上的拍摄图像的基础上，识别狭缝状光图案的边缘部分。 当两个或多个狭缝状光图案的拍摄图像中的边缘部分重叠时，与边缘相对应的位置的计算距离值的可靠性降低。

    SCANNER WITH PHASE AND PITCH ADJUSTMENT
    9.
    发明申请
    SCANNER WITH PHASE AND PITCH ADJUSTMENT 审中-公开
    扫描仪与相位调整

    公开(公告)号：US20130016338A1

    公开(公告)日：2013-01-17

    申请号：US13540737

    申请日：2012-07-03

    申请人： Robert E. Bridges ,  Ryan Kruse ,  Yu Gong ,  Paul McCormack ,  Emmanuel Lafond

    发明人： Robert E. Bridges ,  Ryan Kruse ,  Yu Gong ,  Paul McCormack ,  Emmanuel Lafond

    IPC分类号： G01B11/14 ,  G01B9/02

    CPC分类号： G01B11/2527 ,  G01B11/2531 ,  G01B11/2536

    摘要： A method for determining three-dimensional coordinates of an object point on a surface of an object, including steps of providing a transparent plate having a first region and a second region, the second region having a different wedge angle than the first region; splitting a first beam of light into a first light and a second light; sending the first light through the first region or the second region; combining the first light and the second light to produce a fringe pattern on the surface of the object, the pitch of the fringe pattern depending on the wedge angle through which the first light travels; imaging the object point onto an array point on a photosensitive array to obtain an electrical data value; determining the three-dimensional coordinates of the first object point based at least in part on the electrical data value.

    摘要翻译： 一种用于确定物体表面上的物点的三维坐标的方法，包括提供具有第一区域和第二区域的透明板的步骤，所述第二区域具有与所述第一区域不同的楔角; 将第一光束分解为第一光和第二光; 通过第一区域或第二区域发送第一光; 组合第一光和第二光以在物体的表面上产生条纹图案，条纹图案的间距取决于第一光线穿过的楔角; 将物点成像到光敏阵列上的阵列点上以获得电数据值; 至少部分地基于电数据值来确定第一对象点的三维坐标。

    Dual-frequency Phase Multiplexing (DFPM) and Period Coded Phase Measuring (PCPM) Pattern Strategies in 3-D Structured Light Systems, and Lookup Table (LUT) Based Data Processing
    10.
    发明申请
    Dual-frequency Phase Multiplexing (DFPM) and Period Coded Phase Measuring (PCPM) Pattern Strategies in 3-D Structured Light Systems, and Lookup Table (LUT) Based Data Processing 有权

    公开(公告)号：US20120092463A1

    公开(公告)日：2012-04-19

    申请号：US13205607

    申请日：2011-08-08

    申请人： Kai LIU ,  Yongchang WANG ,  Daniel L. LAU ,  Laurence G. HASSEBROOK

    发明人： Kai LIU ,  Yongchang WANG ,  Daniel L. LAU ,  Laurence G. HASSEBROOK

    IPC分类号： H04N13/02

    CPC分类号： G01B11/2536 ,  G06T7/521

    摘要： A computer-implemented process, system, and computer-readable storage medium having stored thereon, program code and instructions for 3-D triangulation-based image acquisition of a contoured surface/object-of-interest under observation by at least one camera, by projecting onto the surface-of-interest a multi-frequency pattern comprising a plurality of pixels representing at least a first and second superimposed sinusoid projected simultaneously, each of the sinusoids represented by the pixels having a unique temporal frequency and each of the pixels projected to satisfy I n p = A p + ∑ k = 1 K  B k p  cos  ( 2  π   f k  y p + 2  π   kn N ) Eq .  ( 1.1 ) where Inp is the intensity of a pixel in the projector for nth projected image in a particular instant in time; K is an integer representing the number of component sinusoids (e.g., K=2 for a dual-frequency sinusoid pattern, K=3 for a triple-frequency sinusoid, and so on), each component sinusoid having a distinct temporal frequency, where K is less than or equal to (N+1)/2. Images then captured by the camera are defined according to: I n c = A c + ∑ k = 1 K  B k c  cos  ( 2  π   f k  y p + 2  π   kn N ) + η Eq .  ( 1.2 ) To obtain phase terms from the pixels projected in accordance with Eq. 1.2, for each k: 2  π   f k  y p = arctan ( ∑ n = 0 N - 1  I n c × cos  ( 2  π   kn N ) ∑ n = 0 N - 1  I n c × sin  ( 2  π   kn N ) ) . Eq .  ( 1.3 )