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Title:
一場面における霧検出のための方法及び撮像装置
Document Type and Number:
Japanese Patent JP6598960
Kind Code:
B2
Abstract:
A method and an image capturing device (110) for detecting fog in a scene imaged using the image capturing device (110) are disclosed. The image capturing device (110) captures (A010) a first image of the scene without illuminating the scene with IR radiation. The image capturing device (110) determines (A020) a first value of a measure relating to contrast for the first image. When the first value indicates that a first contrast of the first image less than a first threshold value, the image capturing device (110) captures (A030) a second image of the scene while illuminating the scene with IR radiation. The image capturing device (110) determines (A040) a second value of the measure relating to contrast for the second image. When a difference between the first contrast and a second contrast, indicated by the second value, is greater than a second threshold value, the image capturing device (110) determines (A050) that there is fog in the scene. A computer program and a computer program carrier are also disclosed.

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Inventors:
Kanshu
Pale Ulhelmson
Application Number:
JP2018198810A
Publication Date:
October 30, 2019
Filing Date:
October 22, 2018
Export Citation:
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Assignee:
Axis Arb
International Classes:
G01N21/53; G01N21/17; G03B11/00; G06V10/143; H04N5/225; H04N5/232
Domestic Patent References:
JP2005195569A
JP201783352A
JP200214038A
Foreign References:
CN102539385A
US20090046894
Other References:
PAVLIC, M. et al.,Image based fog detection in vehicles,IEEE 2012 Intelligent Vehicle Symposium Alcala de Henares, Spain, June 3-7, 2012,2012年 6月,pages 1132-1137,DOI: 10.1109/IVS.2012.6232256
NARASIMHAN S.G. et al.,Contrast Restoration of Weather Degraded Images,IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE,2003年 6月,VOL. 25, NO. 6, JUNE 2003,pages 713-724,DOI: 10.1109/TPAMI.2003.1201821
Attorney, Agent or Firm:
Haruo Hamada



 
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