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    Detecting Ground Geographic Features in Images Based on Invariant Components
    42.
    发明申请
    Detecting Ground Geographic Features in Images Based on Invariant Components 有权
    基于不变元件检测图像中的地面地理特征

    公开(公告)号：US20100329508A1

    公开(公告)日：2010-12-30

    申请号：US12490538

    申请日：2009-06-24

    申请人： Xin Chen ,  Xiangheng Yang

    发明人： Xin Chen ,  Xiangheng Yang

    IPC分类号： G06K9/00 ,  G06F17/30

    CPC分类号： G06K9/00791 ,  G06K9/00697 ,  G06K9/00704 ,  G06K9/00798

    摘要： Systems, devices, features, and methods for detecting geographic features in images, such as, for example, to develop a navigation database are disclosed. For example, a method of detecting a path marking from collected images includes collecting a plurality of images of geographic areas along a path. An image of the plurality of images is selected. Components that represent an object on the path in the selected image are determined. In one embodiment, the determined components are independent or invariant to scale of the object. The determined components are compared to reference components in a data library. If the determined components substantially meet a matching threshold with the reference components, the object in the selected image is identified to be a path marking corresponding to the reference components in the data library.

    摘要翻译： 公开了用于检测图像中的地理特征的系统，设备，特征和方法，例如开发导航数据库。 例如，从收集的图像中检测路径标记的方法包括沿着路径收集多个地理区域的图像。 选择多个图像的图像。 表示所选图像中路径上的对象的组件被确定。 在一个实施例中，所确定的分量对象的尺度是独立的或不变的。 将确定的组件与数据库中的参考组件进行比较。 如果确定的分量基本上满足与参考分量的匹配阈值，则所选图像中的对象被识别为对应于数据库中的参考分量的路径标记。

    Detecting Geographic Features in Images Based on Invariant Components
    43.
    发明申请
    Detecting Geographic Features in Images Based on Invariant Components 有权
    基于不变元件检测图像中的地理特征

    公开(公告)号：US20100329504A1

    公开(公告)日：2010-12-30

    申请号：US12490555

    申请日：2009-06-24

    申请人： Xin Chen

    发明人： Xin Chen

    IPC分类号： G06K9/00 ,  G06F17/27

    CPC分类号： G06K9/00818 ,  G06K9/00798 ,  G06K9/3258 ,  G06K9/4671 ,  G06K2209/01

    摘要： Systems, devices, features, and methods for detecting geographic features in images, such as, for example, to develop a navigation database are disclosed. For example, a method of detecting text from collected images includes collecting a plurality of images of geographic areas along a road or path. An image of the plurality of images is selected. Components that represent a feature about the road or path in the selected image are determined. In one embodiment, the components are independent or invariant to scale of the feature. The determined components are compared to reference components in a data library. If the determined components substantially match with the reference components, the feature in the selected image is identified to be a text character (e.g., of a road sign) corresponding to at least some of the reference components in the data library.

    摘要翻译： 公开了用于检测图像中的地理特征的系统，设备，特征和方法，例如开发导航数据库。 例如，从收集的图像中检测文本的方法包括沿道路或路径收集多个地理区域的图像。 选择多个图像的图像。 确定表示所选图像中道路或路径的特征的组件。 在一个实施例中，组件对于特征的尺度是独立的或不变的。 将确定的组件与数据库中的参考组件进行比较。 如果确定的分量基本上与参考分量匹配，则所选图像中的特征被识别为对应于数据库中的至少一些参考分量的文本字符（例如，路标）。

    Determining A Geometric Parameter from a Single Image
    44.
    发明申请
    Determining A Geometric Parameter from a Single Image 有权
    从单个图像确定几何参数

    公开(公告)号：US20100321490A1

    公开(公告)日：2010-12-23

    申请号：US12489697

    申请日：2009-06-23

    申请人： Xin Chen ,  Roger B. Hui ,  Narayanan Alwar

    发明人： Xin Chen ,  Roger B. Hui ,  Narayanan Alwar

    IPC分类号： H04N7/18

    CPC分类号： G01C11/00 ,  G01C21/32 ,  G06T7/62 ,  G06T2207/10016 ,  G06T2207/30256

    摘要： Systems, devices, features, and methods for determining a geometric parameter from an image are disclosed. For example, one method for determining the geometric parameter is used to develop a navigation database. The method comprises determining calibration values corresponding to a camera mounted on a vehicle or a pedestrian. A plurality of images of geographic features are captured by the camera. A single image from the plurality of images is identified or selected. A geometric parameter of a region in the single image is determined based on the determined calibration values. For example, the geometric parameter is a real-world distance, such as a real-world length or width.

    摘要翻译： 公开了用于从图像确定几何参数的系统，设备，特征和方法。 例如，用于确定几何参数的一种方法用于开发导航数据库。 该方法包括确定对应于安装在车辆或行人上的照相机的校准值。 地理特征的多个图像由相机捕获。 识别或选择来自多个图像的单个图像。 基于所确定的校准值来确定单个图像中的区域的几何参数。 例如，几何参数是真实世界的距离，例如真实世界的长度或宽度。

    Large Mode Area Optical Fiber
    46.
    发明申请
    Large Mode Area Optical Fiber 有权
    大模光区域光纤

    公开(公告)号：US20100195194A1

    公开(公告)日：2010-08-05

    申请号：US12669664

    申请日：2008-07-16

    申请人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Anping Liu

    发明人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Anping Liu

    IPC分类号： H01S3/09 ,  G02B6/14 ,  G02B6/036 ,  H01S3/067 ,  B05D5/06

    CPC分类号： G02B6/14 ,  G02B6/024 ,  G02B6/03644 ,  G02B6/03661 ,  G02B6/03688 ,  H01S3/06708 ,  H01S3/06712 ,  H01S3/06729 ,  H01S3/08045 ,  H01S3/094007

    摘要： A large-mode-area (LMA) optical fiber (10) that operates as a single-mode optical fiber. The optical fiber includes a core region (20) surrounded by an inner cladding (32), which in turn is surrounded by an outer cladding (40). The inner cladding includes at least one up-doped ring region (32R1). The ring region is configured to form a large attenuation differential between the higher-order modes and the fundamental mode so only that the fundamental mode remains traveling in the optical fiber. If necessary, the optical fiber can include a bend (10B) having a select “resonant” bend diameter (DB) that increases the relative attenuation of the fundamental and higher-order modes. The optical fiber supports an effective mode field diameter (MFD) of up to 40 μm to 50 μm. As a result, detrimental non-linear effects are suppressed, which allows the optical fiber to carry substantially more optical power than conventional LMA optical fibers. The LMA optical fiber is thus eminently suited for a number of optical-fiber-based applications calling for high optical power, such as fiber lasers and pump sources for wavelength conversion.

    摘要翻译： 作为单模光纤工作的大模（LMA）光纤（10）。 光纤包括由内包层（32）包围的芯区域（20），该内部区域又由外包层（40）围绕。 内包层包括至少一个上掺杂环区（32R1）。 环形区域被配置为在高阶模式和基模之间形成大的衰减差分，从而仅使基本模式保持在光纤中行进。 如果需要，光纤可以包括具有选择的“共振”弯曲直径（DB）的弯曲（10B），该弯曲直径（DB）增加了基极和高阶模的相对衰减。 光纤支持高达40μm至50μm的有效模场直径（MFD）。 结果，抑制了有害的非线性效应，这使得光纤比传统的LMA光纤承载更多的光功率。 因此，LMA光纤非常适合于需要高光功率的多个基于光纤的应用，例如用于波长转换的光纤激光器和泵浦光源。

    Polarization maintaining and single polarization optical fiber
    49.
    发明授权
    Polarization maintaining and single polarization optical fiber 失效
    极化维护和单极化光纤

    公开(公告)号：US07697809B2

    公开(公告)日：2010-04-13

    申请号：US12220268

    申请日：2008-07-23

    申请人： Dana Craig Bookbinder ,  Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    发明人： Dana Craig Bookbinder ,  Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    IPC分类号： G02B6/032

    CPC分类号： G02B6/024

    摘要： An optical fiber, comprising: (i) a core having a core center and a radius or a width a, (ii) a cladding surrounding the core, and (iii) at least one stress member situated proximate to the fiber core within the cladding, said stress member comprising silica co-doped with F and at least one dopant selected from the list consisting of: GeO2, P2O5, Y2O3, TiO2 and Al2O3, wherein distance b between the stress member and the core center satisfies the following equation: 1≦b/a

    摘要翻译： 1.一种光纤，包括：（i）具有芯中心和半径或宽度a的芯，（ii）围绕所述芯的包层，以及（iii）至少一个应力构件，位于所述包层内的所述纤维芯附近 所述应力部件包括与F共掺杂的二氧化硅和选自GeO2，P2O5，Y2O3，TiO2和Al2O3中的至少一种掺杂剂，其中应力部件与芯心之间的距离b满足以下等式：1＆nlE ; b / a <2。

    Detection System and Optical Fiber for Use in Such System
    50.
    发明申请
    Detection System and Optical Fiber for Use in Such System 有权
    用于这种系统的检测系统和光纤

    公开(公告)号：US20100085558A1

    公开(公告)日：2010-04-08

    申请号：US12365417

    申请日：2009-02-04

    申请人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    发明人： Xin Chen ,  Joohyun Koh ,  Ming-Jun Li ,  Daniel Aloysius Nolan

    IPC分类号： G01N21/47

    CPC分类号： G01L1/242 ,  C03B2203/19 ,  C03B2203/30 ,  C03B2205/06 ,  G01M11/3181 ,  G02B6/02

    摘要： A detection system comprising: (i) an optical fiber, the optical fiber having (a) a length L≧1 km; (b) beat length between 10 m and 100 m; and (c) beat length uniformity over any distance of at least 100 m within the length L is characterized by standard deviation σ, where |σ|≦10 m; (ii) an OTDR coupled to the fiber and including (a) a radiation source providing pulsed radiation to the fiber, (b) a detection system capable of detecting radiation that is backscattered back through the fiber; and (iii) at least one polarizer situated between the fiber and the detector, such that the backscattered radiation passes through the polarizer before reaching the detector.

    摘要翻译： 一种检测系统，包括：（i）光纤，所述光纤具有（a）长度L≥1km; （b）拍摄距离在10米至100米之间; 和（c）在长度L内的至少100米的任何距离上的击穿长度均匀性的特征在于标准偏差＆sgr，其中|＆sgr | |＆nlE; 10m; （ii）耦合到所述光纤的OTDR，并且包括（a）向所述光纤提供脉冲辐射的辐射源，（b）能够检测通过所述光纤反向散射的辐射的检测系统; 和（iii）位于光纤和检测器之间的至少一个偏振器，使得后向散射的辐射在到达检测器之前穿过偏振器。