Title:
TRAFFIC LIGHT RECOGNITION DEVICE, CONTROL METHOD, PROGRAM, AND MEMORY MEDIUM
Document Type and Number:
WIPO Patent Application WO/2014/115239
Kind Code:
A1
Abstract:
The system controller (20) of a navigation device (1) acquires an image of the periphery of a traffic light using a camera (14) mounted on the vehicle. The system controller (20) also stores a first brightness comparable to the minimum brightness value for each pixel in a subject range (Rtag) on the basis of a plurality of images (Im) acquired during a subject period (Ttag) when the vehicle is in a stationary state. The system controller (20) furthermore calculates, for each of the pixels, the difference between the first brightness value and a brightness value based on at least one image (Im) from amongst a plurality of images (Im) acquired during or immediately after the subject period (Ttag). The system controller (20) then recognizes the type of illuminated signal on the basis of a shape formed by pixels for which the brightness value difference is equal to or greater than a predetermined threshold value.
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Inventors:
ITO KOHEI (JP)
Application Number:
PCT/JP2013/051144
Publication Date:
July 31, 2014
Filing Date:
January 22, 2013
Export Citation:
Assignee:
PIONEER CORP (JP)
International Classes:
G06T1/00; G08G1/16
Foreign References:
JP2012168592A | 2012-09-06 | |||
JP2012238244A | 2012-12-06 | |||
JP2009043068A | 2009-02-26 |
Attorney, Agent or Firm:
NAKAMURA, TOSHINOBU (JP)
Akinobu Nakamura (JP)
Akinobu Nakamura (JP)
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