Fisheye Lens Calibration and Correction

Fisheye lens calibration and correction is critically important for image quality improvement. During the calibration process, we utilize demo images and calibration source code that implements key algorithms such as the Brown-Conrady distortion model or polynomial distortion correction. These tools enable precise fisheye lens correction through mathematical transformation of distorted coordinates to their undistorted positions. The calibration typically involves functions for detecting checkerboard patterns, calculating intrinsic parameters (focal length, principal point), and estimating distortion coefficients. Through proper calibration, we can effectively eliminate various distortion artifacts from images, resulting in clearer and more realistic visual output. The calibration process represents a fundamental step in fisheye lens utilization, significantly enhancing both photography and image processing techniques. Therefore, when capturing or processing images with fisheye lenses, performing comprehensive calibration is essential to achieve optimal results with minimal geometric distortion.