公开(公告)号：US09989456B2

公开(公告)日：2018-06-05

申请号：US13781017

申请日：2013-02-28

Applicant: Facet Technology Corp.

Inventor： Jamie E. Retterath ,  Robert A. Laumeyer

IPC: G06K9/00 ,  G01N21/25 ,  G08G1/0967 ,  G01N21/55 ,  G01N21/84 ,  G01S17/06 ,  G06K9/20 ,  G06K9/46

CPC classification number: G01N21/251 ,  G01N21/55 ,  G01N21/84 ,  G01N2201/06113 ,  G01N2201/102 ,  G01N2201/12 ,  G01S17/06 ,  G06K9/00791 ,  G06K9/00818 ,  G06K9/2036 ,  G06K9/4652 ,  G06K9/4661 ,  G08G1/096758 ,  G08G1/096783

Abstract: A system for the 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 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.

公开(公告)号：US09671328B2

公开(公告)日：2017-06-06

申请号：US15148722

申请日：2016-05-06

Applicant: Facet Technology Corp.

Inventor： James E. Retterath ,  Robert A. Laumeyer

IPC: G01N21/00 ,  G01N21/25 ,  G08G1/0967 ,  G01N21/55 ,  G01N21/84 ,  G01S17/06 ,  G06K9/00 ,  G06K9/20 ,  G06K9/46

CPC classification number: G01N21/251 ,  G01N21/55 ,  G01N21/84 ,  G01N2201/06113 ,  G01N2201/102 ,  G01N2201/12 ,  G01S17/06 ,  G06K9/00791 ,  G06K9/00818 ,  G06K9/2036 ,  G06K9/4652 ,  G06K9/4661 ,  G08G1/096758 ,  G08G1/096783

Abstract: A system for classifying different types of sheeting materials of road signs depicted in a videostream compares estimated retroreflectivity values against known minimum retroreflectivity values for each of a plurality of colors. 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. An estimated retroreflectivity for each of the plurality of colors present on the road sign is then determined. By comparing the estimated retroreflectivity for each of the plurality of colors against known minimum retroreflectivity values for the corresponding color for different types of sheeting materials, an accurate determination of the classification of the sheeting material of the road sign is established. Preferably, certain conditions of gross failure of the sheeting material are filtered out before classification of the sheeting material is determined.

公开(公告)号：US20160356881A1

公开(公告)日：2016-12-08

申请号：US15173969

申请日：2016-06-06

Applicant: Facet Technology Corp.

Inventor： James E. Retterath ,  Robert A. Laumeyer

IPC: G01S7/486 ,  G01S17/93 ,  G01S17/10 ,  G01S7/497 ,  G01S7/481

CPC classification number: G01S7/4863 ,  G01S7/481 ,  G01S7/4815 ,  G01S7/4817 ,  G01S7/4865 ,  G01S7/497 ,  G01S17/10 ,  G01S17/102 ,  G01S17/42 ,  G01S17/89 ,  G01S17/936

Abstract: LiDAR (light detection and ranging) systems use one or more emitters and a detector array to cover a given field of view where the emitters each emit a single pulse or a multi-pulse packet of light that is sampled by the detector array. On each emitter cycle the detector array will sample the incoming signal intensity at the pre-determined sampling frequency that generates two or more samples per emitted light packet to allow for volumetric analysis of the retroreflected signal portion of each emitted light packet as reflected by one or more objects in the field of view and then received by each detector.