Methods and systems for calibrating a camera
AssigneeAptiv Technologies AG
InventorWaldemar Dworakowski
Life of this patent
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Abstract
A computer implemented method for calibrating a camera comprises the following steps carried out by computer hardware components: activating a subset of a plurality of light sources according to a plurality of activation schemes, wherein each activation scheme indicates which of the plurality of light sources to activate; capturing an image for each activation scheme using the camera; and calibrating the camera based on the captured images.
Claims20
A method comprising:
- activating, by computer hardware components, a subset of light sources from a plurality of light sources according to a plurality of activation schemes, wherein each activation scheme of the plurality of activation schemes indicates which light sources from the plurality of light sources to include in the respective subset of light sources;
- capturing, by a camera, an image of each subset of light sources for each activation scheme, a distance between the camera and the plurality of light sources being less than a hyperfocal distance of the camera, the light sources in each captured image being out-of-focus light sources;
- determining, based on respective centers of the out-of-focus light sources in each captured image, respective positions of the light sources relative to the camera in each captured image;
- and
- calibrating the camera based on the positions of the light sources in each captured image.
A computer system comprising computer hardware components configured to:
- activate a subset of light sources from a plurality of light sources according to a plurality of activation schemes, wherein each activation scheme of the plurality of activation schemes indicates which light source of the plurality of light sources to include in the respective subset of light sources;
- capture, by a camera, an image of each subset of light sources for each activation scheme, a distance between the camera and the plurality of light sources being less than a hyperfocal distance of the camera, the light sources in each captured image being out-of-focus light sources;
- determine, based on respective centers of the out-of-focus light sources in each captured image, respective positions of the light sources relative to the camera in each captured image;
- calibrate the camera based on the positions of the light sources in each captured image at least one intrinsic parameter and the at least one extrinsic parameter.
A non-transitory computer readable medium comprising instructions that when executed, configure computer hardware components to:
- activate a subset of light sources from a plurality of light sources according to a plurality of activation schemes, wherein each activation scheme of the plurality of activation schemes indicates which light source of the plurality of light sources to include in the respective subset of light sources;
- capture, by a camera, an image of each subset of light sources for each activation scheme, a distance between the camera and the plurality of light sources being less than a hyperfocal distance of the camera, the light sources in each captured image being out-of-focus light sources;
- determine, based on respective centers of the out-of-focus light sources in each captured image, respective positions of the light sources relative to the camera in each captured image;
- and
- calibrate the camera based on the positions of the light sources in each captured image at least one intrinsic parameter and the at least one extrinsic parameter.
Dependencies are inferred from the claim text.