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    • 4. 发明授权
    • Color ranging method for high speed low-cost three dimensional surface
profile measurement
    • US5675407A
    • 1997-10-07
    • US397766
    • 1995-03-02
    • Zheng Jason Geng
    • Zheng Jason Geng
    • G01B11/25G01C21/00G01S17/89H04N13/00G01C1/00
    • G06T7/0057G01B11/2509G01C21/00G01S17/89H04N13/025H04N13/0214H04N2013/0081
    • The target of the present invention is to provide an automatic high speed, low-cost, multi-mode three-dimensional(3D) surface profile measurement method. This method exploits the projected energy with a known spatially distributed wavelength spectrum on the surface of objects in the scene. The unique wavelength is encoded with geometry information of a unique projection ray of the radiation energy in 3D space. This wavelength of the projected energy is detected by a 2D image sensor array that is able to uniquely distinguish the wavelength of the radiation energy at the points of interest on the scene. The projection geometry information is recovered by using a color match scheme and the range values associated with every pixel of the 2D image sensor will be calculated through a straightforward triangulation algorithm. Full frames of 3D range images can then be obtained directly at the frame acquisition rate of the 2D image sensor array. The color ranging method eliminates the time consuming corresponding feature finding problem of normal binocular 3D imaging systems. Therefore, it is suitable for high speed, real-time measurement automation. Since there are no mechanical moving parts in our color ranging method, the mechanical design can be very simple and reliable. All components in this system are available off-the-shelf which leads to low cost. With the active light source being turned on or off, the same color camera can provide normal intensity images as well as 3D range data. This multi-mode capability greatly simplifies the problems of multiple sensor integration and sensor data fusion. Depending on the applications, the scope of the color spectrum of the energy projector can be selected from UV, visible, or IR light region. The Color Ranging method is not based on a laser therefore there is no "eyes safe" problem. This is certainly a desirable feature enable this system to be used for other commercial applications, such as medical applications like the facial plastic reconstruction surgery evaluation.
    • 5. 发明授权
    • Non-imaging freeform optical device for use in a high concentration photovoltaic device
    • 用于高浓度光伏器件的非成像自由形式光学器件
    • US08553338B1
    • 2013-10-08
    • US12871498
    • 2010-08-30
    • Zheng Jason Geng
    • Zheng Jason Geng
    • G02B17/00G02B13/18G02B3/06
    • G02B3/02F24S23/31F24S23/70F24S23/79G02B19/0028G02B19/0042H01L31/0543H01L31/0547Y02E10/43Y02E10/52
    • A high concentration photovoltaic (HCPV) optics are described. In one example, an HCPV device can include a frame and a solar sensor cell attached to the frame. The solar cell can be configured to receive an optical beam and can further be configured to convert solar energy in the incident optical beam into electrical energy or power. The HCPV device can further include a non-imaging freeform optical device. The optical device can have an asymmetric surface profile with a predefined surface normal arranged to direct incident optical beams toward an entire solar sensor cell surface area. The freeform optical device can have a larger diameter than the solar sensor cell. Also, the freeform optical device can have an asymmetric surface profile shaped to concentrate the incident optical beams onto the solar sensor cell.
    • 描述了高浓度光伏(HCPV)光学器件。 在一个示例中,HCPV设备可以包括框架和附接到框架的太阳能传感器单元。 太阳能电池可以被配置为接收光束,并且还可以被配置为将入射光束中的太阳能转换成电能或功率。 HCPV装置还可以包括非成像自由形式的光学装置。 光学装置可以具有非对称的表面轮廓,具有预定义的表面法线,其布置成将入射光束引向整个太阳能传感器单元表面区域。 自由形式的光学装置可以具有比太阳能传感器单元更大的直径。 此外,自由形式光学器件可以具有成形为将入射光束集中到太阳能传感器单元上​​的非对称表面轮廓。
    • 6. 发明授权
    • High speed three dimensional imaging method
    • 高速三维成像方法
    • US6147760A
    • 2000-11-14
    • US372980
    • 1999-08-12
    • Zheng Jason Geng
    • Zheng Jason Geng
    • G01B11/25G01S17/42G01B11/24
    • G06T7/0057G01B11/2509G01S17/42
    • A three-dimensional (3D) surface profile measurement method and apparatus uses projected energy with a known spatially varying wavelength distribution over the surface of objects in a scene. The varying wavelength of the light corresponds to the angle at which the light is emitted from a light source. Given this correspondence, light reflected from the scene can be identified by wavelength as to angle at which it was emitted. Triangulation can then be used to determine the distance to the point in the scene from which the detected light is reflected. When performed over a number of points on the scene, a three-dimensional profile of the scene can be generated.
    • 三维(3D)表面轮廓测量方法和装置在场景中的物体的表面上使用具有已知空间变化的波长分布的投影能量。 光的变化波长对应于光从光源发射的角度。 给定这种对应关系,从场景反射的光可以通过波长来识别其发射角度。 然后,可以使用三角测量来确定与所检测到的光被反射的场景中的点的距离。 当在场景上的多个点上执行时,可以生成场景的三维轮廓。
    • 7. 发明申请
    • Wide Field of View Reflector and Method of Designing and Making Same
    • 宽视野反射镜及其设计与制作方法
    • US20140009571A1
    • 2014-01-09
    • US13925728
    • 2013-06-24
    • Zheng Jason Geng
    • Zheng Jason Geng
    • H04N5/232
    • H04N5/23238G08B13/19628G08B13/19643G08B13/19697H04N7/183
    • A system and method for designing and using freeform reflectors to collect images of a wide angle field-of-view scene is provided. A freeform reflector may enable a wide angle field-of-view to be collected in an unwarped and unwrapped manner such that computer processing may be eliminated. Furthermore, the use of a freeform reflector allows for larger areas of an image sensor chip to be used, thereby providing higher resolution images. Because freeform reflectors may be configured to map a scene onto the image sensor chip in a scalar and mathematically correct manner, output images may be directly displayed from the image sensor chip. Wide angle field-of-view imaging systems, such as surveillance, alarm, and projector system, may utilize freeform reflectors as provided herein.
    • 提供了一种用于设计和使用自由形反射器以收集广角视场的图像的系统和方法。 自由形式的反射器可以使广角视场能够以不正确和展开的方式收集,从而可以消除计算机处理。 此外,使用自由形式反射器允许使用图像传感器芯片的较大区域,从而提供更高分辨率的图像。 因为自由形反射器可以被配置为以标量和数学上正确的方式将场景映射到图像传感器芯片上,所以可以从图像传感器芯片直接显示输出图像。 诸如监视,报警和投影仪系统的广角视野成像系统可以使用如本文提供的自由形反射器。
    • 9. 发明申请
    • SYSTEM AND METHOD FOR GENERATING A 3D MODEL OF ANATOMICAL STRUCTURE USING A PLURALITY OF 2D IMAGES
    • 使用多维2D图像生成解剖结构的3D模型的系统和方法
    • US20090010507A1
    • 2009-01-08
    • US12167189
    • 2008-07-02
    • Zheng Jason Geng
    • Zheng Jason Geng
    • G06K9/00
    • G06T7/593G06T2207/10021G06T2207/10068G06T2207/30028
    • A system and method are provided for generating a three dimensional (3D) model of an anatomical structure of a patient using a plurality of two dimensional (2D) images acquired using a camera. The method includes the operation of searching the plurality of 2D images to detect correspondence points of image features across at least two images. Camera motion parameters can be determined using the correspondence points for a sequence of at least two images taken at different locations by the camera moving within the internal anatomical structure. A further operation is computing dense stereo maps for 2D image pairs that are temporally adjacent. A consistent 3D model can be formed by fusing together multiple 2D images which are applied to a plurality of integrated 3D model segments. Then the 3D model of the patient's internal anatomical structure can be displayed to a user on a display device.
    • 提供了一种系统和方法,用于使用使用相机获取的多个二维(2D)图像来生成患者的解剖结构的三维(3D)模型。 该方法包括搜索多个2D图像以检测跨至少两个图像的图像特征的对应点的操作。 可以使用在内部解剖结构内移动的相机在不同位置拍摄的至少两幅图像的序列的对应点来确定相机运动参数。 另外的操作是计算时间上相邻的2D图像对的密集立体图。 可以通过将应用于多个集成3D模型段的多个2D图像融合在一起来形成一致的3D模型。 然后可以将患者的内部解剖结构的3D模型显示给显示装置上的用户。
    • 10. 发明授权
    • High speed three dimensional imaging method
    • 高速三维成像方法
    • US6028672A
    • 2000-02-22
    • US720462
    • 1996-09-30
    • Zheng Jason Geng
    • Zheng Jason Geng
    • G01B11/02G01B11/24G01B11/25G01S17/42
    • G06T7/0057G01B11/022G01B11/24G01B11/2509G01S17/42
    • The target of the present invention is to provide a high speed, low-cost, multi-mode three-dimensional (3D) surface profile measurement method. The proposed Rainbow Stereo 3D Camera exploits the projected color light with a spatially distributed wavelength spectrum on the surface of objects in the scene. Multiple color imaging sensors separated by a baseline distance are used to capture stereo pair images of the scene at camera's frame rate. The 3D depth values are calculated using triangulation principle by finding pixels corresponding to a common color feature in both images. Unlike conventional stereo correspondence matching algorithms, which requires the feature extraction from a group of pixels, the proposed method utilizes a projected rainbow color pattern as unique landmarks of each pixel for correspondence registration. Essentially, the colors of pixels in a pair of stereo images are used as a "token" to perform the stereo match. Searching corresponding point in a pair of stereo images becomes a straightforward pixel-to-pixel color matching. A simple and efficient 3D triangulation algorithm can be formulated to generate full frames of 3D images in high speed.
    • 本发明的目标是提供高速,低成本,多模式三维(3D)表面轮廓测量方法。 所建议的彩虹立体声3D相机利用场景中物体表面上的空间分布波长光谱投影彩色光。 用基线距离分开的多个彩色成像传感器用于以相机的帧速率拍摄场景的立体对图像。 使用三角测量原理通过找到对应于两个图像中的共同颜色特征的像素来计算3D深度值。 不同于需要从一组像素中提取特征的常规立体声对应匹配算法,所提出的方法利用投影的彩虹色图案作为每个像素的唯一地标,用于对准登记。 本质上,一对立体图像中的像素的颜色被用作执行立体匹配的“令牌”。 搜索一对立体图像中的对应点成为直接的像素到像素的颜色匹配。 可以制定一种简单高效的3D三角测量算法,以高速生成全帧3D图像。