Calibration method, calibration object, device, readable storage medium and program product
By using control points distributed in different regions and interpolation methods in camera calibration, a spatially varying distortion parameter field is constructed, which solves the problem of insufficient fitting of asymmetric and localized distortion in the existing technology, and realizes high-precision and low-cost camera calibration.
CN122368209APending Publication Date: 2026-07-10QINGDAO PICO TECH CO LTD
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- QINGDAO PICO TECH CO LTD
- Filing Date
- 2026-04-22
- Publication Date
- 2026-07-10
AI Technical Summary
Technical Problem
Existing camera calibration techniques cannot effectively fit complex asymmetric and localized distortions, resulting in decreased calibration accuracy and failing to meet high-precision requirements.
Method used
By using control points distributed in different regions, distortion parameters are obtained through interpolation, and a spatially varying distortion parameter field is constructed. The interpolation process ensures a continuous and smooth transition of distortion parameters in space, making it suitable for complex distortions that are asymmetric and localized.
Benefits of technology
It improves the accuracy and precision of camera calibration, reduces the cost of repeated calibration, and is applicable to cameras with different resolutions.
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Smart Images
Figure CN122368209A_ABST
Abstract
In some cases, a calibration method, calibration object, device, readable storage medium, and program product are provided. The method includes: acquiring first image data, which is obtained by a camera capturing an object in three-dimensional space; the object includes multiple object points, and the first image data includes first coordinates of the multiple object points in a first coordinate system; reprojecting second coordinates of the object points onto the first coordinate system based on a distorted camera model to obtain third coordinates; wherein, during the process of reprojecting the second coordinates onto the first coordinate system, the second coordinates are mapped onto a preset plane to obtain fourth coordinates, and the fourth coordinates are distorted using a first distortion parameter; the first distortion parameter is obtained by interpolation of second distortion parameters of multiple control points, the multiple control points being located in different regions of the preset plane, and the second coordinates being the coordinates of the object points in the second coordinate system; and determining camera parameters based on the third coordinates and the first coordinates, the parameters including the second distortion parameter.
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