Camera system mounted on moving body, control method for camera system, image processing apparatus, and image processing method
A camera system includes an image acquisition unit that acquires an image generated by an imaging unit installed to capture an image of a region above a moving body and configured to capture an optical image including a first region with high distortion corresponding to an angle of view less than a predetermined angle of view and a second region with lower distortion than the first region corresponding to an angle of view equal to or greater than the predetermined angle of view, a clipping angle-of-view setting unit that sets an angle of view at which a part of the captured image is to be displayed on a monitor, a distortion correction processing unit the performs distortion correction processing on an image clipped at the set angle of view, based on information on the set angle of view, and a monitor configured to display the distortion-corrected clipped image.
1 . A camera system comprising:
an image acquisition unit configured to acquire an image generated by an imaging unit, the imaging unit being installed so as to capture an image of a region above a moving body and configured to capture an optical image, the optical image including a first region with high distortion corresponding to an angle of view less than a predetermined angle of view and a second region with lower distortion than the first region corresponding to an angle of view equal to or greater than the predetermined angle of view;
a clipping angle-of-view setting unit configured to set an angle of view at which a part of the image captured by the imaging unit is to be displayed on a monitor;
a distortion correction processing unit configured to perform distortion correction processing on a clipped image that is clipped at the angle of view set by the clipping angle-of-view setting unit, based on information on the angle of view set by the clipping angle-of-view setting unit; and
a monitor configured to display the clipped image on which the distortion correction has been performed.
2 . The camera system according to claim 1 , wherein the distortion correction processing unit performs the distortion correction processing in a case where the clipping angle of view set by the clipping angle-of-view setting unit includes the first region, and does not perform the distortion correction processing in a case where the clipping angle of view does not include the first region.
3 . The camera system according to claim 1 , further comprising a rotation processing control unit configured to perform rotation processing in a case where the clipping angle of view set by the clipping angle-of-view setting unit is inclined with respect to pixel arrangement of the imaging unit, and does not perform the rotation processing in a case where the clipping angle of view is not inclined with respect to the pixel arrangement of the imaging unit.
4 . The camera system according to claim 1 , wherein the imaging unit includes:
an optical system configured to form the optical image; and
an imaging element configured to capture the optical image formed by the optical system.
5 . The camera system according to claim 1 , wherein the second region with lower distortion than the first region and first region with high distortion correspond to a high-resolution region and a low-resolution region of the optical image, respectively.
6 . The camera system according to claim 4 , wherein the optical system satisfies the following conditional expression:
0
.
1
<
2
×
f
×
tan
(
θ
max
/
2
)
/
y
(
θ
max
)
<
1
.
2
,
where f is a focal length, θ is a half angle of view, y is an image height on an image plane, y(θ) is a projection characteristic representing a relationship between the image height y and the half angle of view θ, and θmax is a maximum half angle of view of the optical system.
7 . The camera system according to claim 1 , wherein the clipping angle-of-view setting unit determines coordinate information on the clipping angle of view based on a user interface (UI) operation, such as a touch operation or a mouse operation.
8 . A control method for a camera system, the control method comprising:
acquiring an image generated by an imaging unit, the imaging unit being installed so as to capture an image of a region above a moving body and configured to capture an optical image, the optical image including a first region with high distortion corresponding to an angle of view less than a predetermined angle of view and a second region with lower distortion than the first region corresponding to an angle of view equal to or greater than the predetermined angle of view;
setting an angle of view at which a part of the image captured by the imaging unit is to be displayed on a monitor;
performing distortion correction processing on a clipped image that is clipped at the angle of view set in the setting, based on information on the angle of view set in the setting; and
displaying the clipped image on which the distortion correction has been performed on a monitor.
9 . An image processing apparatus comprising:
an image acquisition unit configured to acquire an image generated by an imaging unit, the imaging unit being installed so as to capture an image of a region above a moving body and configured to capture an optical image, the optical image including a first region with high distortion corresponding to an angle of view less than a predetermined angle of view and a second region with lower distortion than the first region corresponding to an angle of view equal to or greater than the predetermined angle of view;
a clipping angle-of-view setting unit configured to set an angle of view at which a part of the image captured by the imaging unit is to be displayed on a monitor;
a distortion correction processing unit configured to perform distortion correction processing on a clipped image that is clipped at the angle of view set by the clipping angle-of-view setting unit, based on information on the angle of view set by the clipping angle-of-view setting unit; and
a display control unit configured to display the clipped image on which the distortion correction has been performed on a monitor.
10 . An image processing method comprising:
acquiring an image generated by an imaging unit, the imaging unit being installed so as to capture an image of a region above a moving body and configured to capture an optical image, the optical image including a first region with high distortion corresponding to an angle of view less than a predetermined angle of view and a second region with lower distortion than the first region corresponding to an angle of view equal to or greater than the predetermined angle of view;
setting an angle of view at which a part of the image captured by the imaging unit is to be displayed on a monitor;
performing distortion correction processing on a clipped image that is clipped at the angle of view set in the setting, based on information on the angle of view set in the setting; and
displaying the clipped image on which the distortion correction has been performed on a monitor.