Road surface recognition sensor using an optical spatial filter

Author

Shinmoto, Yuichi ; Takagi, Junichi ; Egawa, Kouichi ; Murata, Yoshiroh ; Takeuchi, Masashi

Author_Institution

Central R&D Lab., Omron Corp., Kyoto, Japan

fYear

1997

fDate

9-12 Nov 1997

Firstpage

1000

Lastpage

1004

Abstract

A road surface recognition sensor has been realized by using an optical spatial filter. The sensor transforms a road surface image into a spatial frequency spectrum. The frequency distribution depends on the road surface type. Ground velocity is shown by a filtered moving image. In order to develop a stable system with this method, we have constructed a system which detects normal reflection for the recognition of road surface and diffuse reflection for the acquisition of vehicle velocity, alternately. Experimental results show that seven different types of road surface were correctly recognized in cold districts. Both road surface condition and vehicle velocity can be detected by a noncontact sensor. This sensor is convenient for the information systems of road surface condition

Keywords

automated highways; fast Fourier transforms; image sensors; intelligent sensors; light emitting diodes; optical filters; road vehicles; spatial filters; velocimeters; frequency distribution; ground velocity; information systems; noncontact sensor; normal reflection; optical spatial filter; road surface image; road surface recognition sensor; spatial frequency spectrum; Frequency; Image sensors; Information systems; Optical filters; Optical reflection; Optical sensors; Road vehicles; Sensor systems; Spatial filters; Vehicle detection;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Transportation System, 1997. ITSC '97., IEEE Conference on

Conference_Location

Boston, MA

Print_ISBN

0-7803-4269-0

Type

conf

DOI

10.1109/ITSC.1997.660610

Filename

660610