Rain sensor
First Claim
1. A rain sensor comprising:
- a light emission unit configured to emit light to a raindrop detection region set on a windshield;
a camera which is arranged on the optical path of the light totally reflected by the detection region and captures the detection region; and
a detection unit configured to detect raindrops adhering to the detection region from contrast in the image captured by the camera;
whereinthe detection unit detects the raindrops adhering to the detection region based on at least one of the captured image in the detection region to which light is emitted from the light emission unit and the captured image in the detection region to which light is not emitted from the light emission unit.
1 Assignment
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Accused Products
Abstract
There is provided a rain sensor capable of adequately detecting raindrops in a captured image. The rain sensor includes: a surface light source 14 which emits light to a windshield G to cause light to be incident on a raindrop detection region T set on the windshield G at a critical angle or more; a camera 15 which is arranged on the optical path of light totally reflected by the detection region T and captures the detection region T; and a detection unit which detects raindrops adhering to the detection region T from contrast in the image captured by the camera 15; the detection unit detects the raindrops adhering to the detection region T based on at least one of the captured image in the detection region T to which light is emitted from the surface light source 14 and the captured image in the detection region T to which light is not emitted from the surface light source 14.
20 Citations
6 Claims
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1. A rain sensor comprising:
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a light emission unit configured to emit light to a raindrop detection region set on a windshield; a camera which is arranged on the optical path of the light totally reflected by the detection region and captures the detection region; and a detection unit configured to detect raindrops adhering to the detection region from contrast in the image captured by the camera;
whereinthe detection unit detects the raindrops adhering to the detection region based on at least one of the captured image in the detection region to which light is emitted from the light emission unit and the captured image in the detection region to which light is not emitted from the light emission unit. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification