Visibility condition determining device for vehicle
First Claim
1. A visibility condition determining device for a vehicle, the device comprising:
- a lighting device that is mounted on the vehicle and irradiates an outside of the vehicle with a beam;
an in-vehicle camera that picks up an image including a transmission space through which the beam irradiated from the lighting device is transmitted in an imaging area, and including a non-irradiated area that is not directly irradiated with the beam in a background of the transmission space in the image; and
visibility condition determining means for determining a visibility condition outside of the vehicle based on a brightness of the non-irradiated area on the image which is picked up by the in-vehicle camera when the lighting device irradiates outside of the vehicle.
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Abstract
A visibility condition determining device for a vehicle has a lighting device, an in-vehicle camera and an image processing unit. The lighting device is mounted on the vehicle and irradiates an outside of the vehicle with its light beam. The in-vehicle camera picks up an image including a transmission space through which the beam irradiated from the lighting device is transmitted in an imaging area, and including a non-irradiated area that is not directly irradiated with the beam in a background of the transmission space in the image. The image processing unit determines a visibility condition outside of the vehicle based on a brightness of the non-irradiated area in the image which is picked up by the in-vehicle camera when the lighting device irradiates outside of the vehicle.
37 Citations
16 Claims
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1. A visibility condition determining device for a vehicle, the device comprising:
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a lighting device that is mounted on the vehicle and irradiates an outside of the vehicle with a beam; an in-vehicle camera that picks up an image including a transmission space through which the beam irradiated from the lighting device is transmitted in an imaging area, and including a non-irradiated area that is not directly irradiated with the beam in a background of the transmission space in the image; and visibility condition determining means for determining a visibility condition outside of the vehicle based on a brightness of the non-irradiated area on the image which is picked up by the in-vehicle camera when the lighting device irradiates outside of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification