Vehicle periphery monitoring device
An object is to provide a vehicle periphery monitoring device wherein distortions in a captured image containing an edge of the vehicle body can be corrected so that parallel perception is the same as in actual space, and wherein images readily discernible to the driver can be displayed. The edge of the vehicle body is included in the image captured by a camera provided to the vehicle. A Y-axis along the edge of the vehicle body and an X-axis orthogonal to the Y-axis are set in the captured image. Distortions are corrected so that the X-axis is enlarged at a magnification ratio γ that increases in a nonlinear fashion that depends of the distance from the X-axis while the Y-axis is kept substantially fixed. The captured image thus corrected for distortion is displayed on an onboard monitor.
1. A vehicle periphery monitoring device for subjecting an image captured by a camera provided to a vehicle to predetermined image processing, and displaying the image on an onboard display device, the vehicle periphery monitoring device comprising:
a coordinate axes setting unit for setting a first axis along an edge of the vehicle body in the captured image, and a second axis orthogonal to the first axis, the camera being disposed so as to include the edge of the vehicle body in the captured image; and
a distortion correction processor for enlarging the captured image at a magnification ratio that increases in the second axis direction in a nonlinear fashion that depends on the distance from the second axis while a magnification ratio in the first axis direction is kept substantially fixed, wherein
the captured image corrected for distortion is displayed on the display device;
the first axis direction is a vertical direction of the captured image, and the second axis direction is a lateral direction of the captured image.
2. The vehicle periphery monitoring device according to claim 1 , wherein the coordinate axes setting unit sets the first axis and the second axis using the imaging center of the camera as the origin.
3. The vehicle periphery monitoring device according to claim 1 , wherein the camera is a side camera, and the imaging direction of the side camera is set facing perpendicularly downward.
4. The vehicle periphery monitoring device according to claim 1 , wherein the camera is a rear camera.
5. The vehicle periphery monitoring device according to claim 2 , wherein the camera is a side camera, and the imaging direction of the side camera is set facing perpendicularly downward.
6. The vehicle periphery monitoring device according to claim 2 , wherein the camera is a rear camera.
7. The vehicle periphery monitoring device according to claim 1 , wherein the magnification ratio in the first axis direction is kept fixed.
8. A vehicle periphery monitoring device for subjecting an image captured by a camera provided to a vehicle to predetermined image processing, and displaying the image on an onboard display device, the vehicle periphery monitoring device comprising:
a coordinate axes setting unit for setting a first axis extending in a front-rear direction of the vehicle body in the captured image, and a second axis orthogonal to the first axis, the camera being disposed so as to include the edge of the vehicle body in the captured image; and
a distortion correction processor for enlarging the captured image at a magnification ratio that increases in the second axis direction in a nonlinear fashion that depends on the distance from the second axis while a magnification ratio in the first axis direction is kept substantially fixed, wherein
the captured image corrected for distortion is displayed on the display device the first axis direction is a vertical direction of the captured image, and the second axis direction is a lateral direction of the captured image.