基于外参调整的平面成像透视变形校正方法
By adjusting the extrinsic parameters of a monocular camera to generate ideal, perspective-free points and establishing a perspective transformation model, the problem of measurement inaccuracy caused by perspective distortion of the target plane is solved. This achieves the preservation of image plane proportions and distance scales, and improves measurement accuracy and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TIANJIN UNIV
- Filing Date
- 2024-02-27
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies cause perspective distortion when the target plane is not perpendicular to the camera's optical axis, affecting the accuracy and stability of measurement results. Furthermore, manually setting an ideal point without perspective distortion makes it difficult to maintain the aspect ratio and relative distance scale of the plane.
By calibrating the intrinsic parameters and distortion coefficients of a monocular camera, the checkerboard corner points of the perspective distortion image are detected, the out-of-plane parameters are calculated and the rotation matrix is adjusted to generate ideal perspective distortion-free points, a perspective transformation model is established and the model parameters are optimized to achieve perspective distortion correction.
It effectively maintains the aspect ratio of the image plane and the relative camera distance scale, improves the accuracy and stability of the pixel equivalent method, and realizes perspective distortion correction under arbitrary configuration.
Smart Images
Figure CN118037605B_ABST