Calibration method and calibration device
AssigneeKoito Manufacturing Co., Ltd.
InventorAtsumi SUZUKI
Life of this patent
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Abstract
A calibration method includes forming a calibration pattern with a light distribution variable lamp onto a screen located at a distance from the light distribution variable lamp and an imaging device, capturing an image of the calibration pattern with the imaging device, acquiring a correspondence relationship between position coordinates of an image captured by the imaging device and position coordinates of the calibration pattern in a light illumination range, calculating an amount of parallax difference between the light distribution variable lamp and the imaging device, and correcting the correspondence relationship based on the amount of parallax difference and generating mutual position information between the light illumination range and the imaging range.
Claims17
A calibration method of calibrating between a light illumination range of a light distribution variable lamp that illuminates a region ahead of a vehicle with light and an imaging range of an imaging device that captures an image of the region ahead of the vehicle, the calibration method comprising:
- forming a calibration pattern with the light distribution variable lamp onto a screen located at a distance from the light distribution variable lamp and the imaging device;
- capturing an image of the calibration pattern on the screen with the imaging device;
- acquiring a correspondence relationship between position coordinates of the image captured by the imaging device and position coordinates of the calibration pattern in the light illumination range;
- calculating an amount of parallax difference between the light distribution variable lamp and the imaging device;
- and
- correcting the correspondence relationship based on the amount of parallax difference and generating mutual position information between the light illumination range and the imaging range.
A calibration device that calibrates between a light illumination range of a light distribution variable lamp that illuminates a region ahead of a vehicle with light and an imaging range of an imaging device that captures an image of the region ahead of the vehicle, the calibration device:
- acquires an image captured by the imaging device of a calibration pattern that the light distribution variable lamp forms on a screen located at a distance from the light distribution variable lamp and the imaging device;
- acquires a correspondence relationship between position coordinates of the image and position coordinates of the calibration pattern in the light illumination range;
- calculates an amount of parallax difference between the light distribution variable lamp and the imaging device;
- and
- corrects the correspondence relationship based on the amount of parallax difference and generates mutual position information between the light illumination range and the imaging range.
Dependencies are inferred from the claim text.