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    SYSTEM FOR AUTOMATED DETERMINATION OF RETROREFLECTIVITY OF ROAD SIGNS AND OTHER REFLECTIVE OBJECTS
    1.
    发明申请
    SYSTEM FOR AUTOMATED DETERMINATION OF RETROREFLECTIVITY OF ROAD SIGNS AND OTHER REFLECTIVE OBJECTS 审中-公开
    用于自动确定道路标志和其他反射物体回归性的系统

    公开(公告)号：WO02101340A3

    公开(公告)日：2003-04-10

    申请号：PCT/US0217914

    申请日：2002-06-05

    Applicant: FACET TECHNOLOGY CORP

    Inventor： RETTERATH JAMES E ,  LAUMEYER ROBERT A

    IPC: G08G1/0962 ,  G08G1/0967 ,  G06K9/00

    CPC classification number: G08G1/096758 ,  G01N21/55 ,  G01N2021/551 ,  G08G1/0962 ,  G08G1/096716 ,  G08G1/096775 ,  G08G1/096783 ,  G08G1/096791

    Abstract: A system for the automated determination of retroreflectivity values for reflective surfaces disposed along a roadway repeatedly illuminates an area along the roadway that includes at least one reflective surface using a strobing light source. Multiple light intensity values are measured over a field of view which includes at least a portion of the area illuminated by the light source. A computer processing system is used to identifying a portion of the light intensity values associated with a reflective surface and analyze the portion of the light intensity values to determine at least one retroreflectivity value for that reflective surface. Preferably, color images of the area and locational information are also generated by the system and are used together with a characterization profile of the light source to enhance the accuracy of the determination of retroreflectivity values. In one embodiment, a three-dimensional overlay of retroreflectivity values for the roadway is generated and can be manipulated to display retroreflectivity values of a reflective surface at any desired point along the roadway. In another embodiment, a virtual drive through along a roadway is simulated using a plurality of retroreflectivity values to simulate reflections from each reflective surface disposed along the roadway during the virtual drive through.

    Abstract translation: 用于自动确定沿道路设置的反射表面的后向反射率值的系统使用选通光源重复地照亮包括至少一个反射表面的道路的区域。 在包括由光源照射的区域的至少一部分的视野中测量多个光强度值。 计算机处理系统用于识别与反射表面相关联的光强值的一部分，并且分析光强度值的该部分以确定该反射表面的至少一个后向反射率值。 优选地，该区域和位置信息的彩色图像也由系统生成，并且与光源的表征轮廓一起使用以增强后向反射率值的确定的准确性。 在一个实施例中，产生用于道路的后向反射率值的三维覆盖，并且可以被操纵以在沿着道路的任何期望点显示反射表面的后向反射率值。 在另一个实施例中，通过多个后向反射率模拟沿着道路穿过的虚拟驱动器，以模拟在虚拟驱动通过期间沿着道路设置的每个反射表面的反射。

    SYSTEM FOR ROAD SIGN SHEETING CLASSIFICATION
    2.
    发明申请
    SYSTEM FOR ROAD SIGN SHEETING CLASSIFICATION 审中-公开
    道路标志分类系统

    公开(公告)号：WO0215144A2

    公开(公告)日：2002-02-21

    申请号：PCT/US0125159

    申请日：2001-08-10

    Applicant: FACET TECHNOLOGY CORP

    Inventor： RETTERATH JAMES E ,  LAUMEYER ROBERT A

    IPC: G08G1/0962 ,  G08G1/0967 ,  G08G

    CPC classification number: G08G1/096758 ,  G08G1/096716 ,  G08G1/09675 ,  G08G1/096775 ,  G08G1/096783 ,  G08G1/096791

    Abstract: A system for classifying different types of sheeting materials of road signs (Fig.2, element 32, 34, 36) depicted in a videostream (Fig.2, element 52) compares estimated retroreflectivity values against known minimum retroreflectivity values for each of a plurality of colors (Fig.2, elements 40, 42, 44, 46 and 50). Once a road sign has been identified in the videostream, the frames associated with that road sign are analyzed to determine each of a plurality of colors present on the road sign.

    Abstract translation: 用于对视频流（图2，元件52）中描绘的道路标志的不同类型的片材材料（图2，元件32,34,36）进行分类的系统将估计的后向反射率值与多个中的每一个的已知最小后向反射率值进行比较 的颜色（图2，元素40,42,44,46和50）。 一旦在视频流中识别出道路标志，就分析与该道路标志相关联的帧，以确定道路标志上存在的多种颜色中的每一种。

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