Methods, devices, electronic equipment, and media for calibrating camera parameters

CN118379359BActive Publication Date: 2026-06-30SAIC GM WULING AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SAIC GM WULING AUTOMOBILE CO LTD
Filing Date
2024-04-07
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In traditional camera parameter calibration methods, the positions of the calibration board corner points in the camera's captured images are not clear enough, resulting in inaccurate corner point coordinates and affecting the accuracy of the camera parameter calibration results.

Method used

By obtaining the coordinates of the first corner point in the image of the calibration board captured by the camera, and using the initial values ​​to obtain a bird's-eye view, the coordinates of the second corner point in the first image are further determined. The camera parameters are calibrated by combining the coordinates of multiple corner points.

Benefits of technology

It improves the accuracy and precision of camera parameter calibration, and is applicable to the automated calibration of cameras in different vehicle models and installation methods.

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    Figure CN118379359B_ABST
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Abstract

This application provides a method, apparatus, electronic device, and medium for calibrating camera parameters. The method includes: obtaining the coordinates of a first corner point in a first image, wherein the first image is obtained by capturing an image of a calibration board with a target camera, and the first corner point is a corner point of a calibration grid on the calibration board; obtaining initial values ​​of setting parameters for the target camera based on the coordinates of the first corner point in the first image; obtaining a bird's-eye view of the first image using the initial values ​​of the setting parameters to obtain a second image; obtaining the coordinates of a second corner point in the second image, wherein the second corner point is a corner point of the calibration grid that is different from the first corner point; obtaining the coordinates of the second corner point in the first image based on the coordinates of the second corner point in the second image and the initial values ​​of the setting parameters; and obtaining calibration values ​​of the setting parameters based on the coordinates of the first corner point in the first image and the coordinates of the second corner point in the first image. This application helps to accurately calibrate camera parameters.
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