Uniformity Calibration of Mini/Micro Light Emitting Diode Splicing Screen Based on Multi-Image Fusion and Parameter Optimization

Calculation of the calibration curved surface is crucial for enhancing the uniformity of Light Emitting Diode (LED) Splicing displays. Based on error modeling and parameter optimization, this paper proposes a method to derive calibration curved surface from multiple images. By altering the relative pose between the camera and screen twice, equality constraints for surface parameters are established, then an optimization model is formulated and solved to achieve uniformity calibration. Compared with conventional methods, our approach reduces the impact of brightness patterns between modules in splicing displays, offering a more efficient solution for large-scale, multi-batch LED display calibration.