基于改进Harris角点提取的摄像机神经网络标定技术

Neural Network Technique on Camera Calibration Based on Improved Harris Corner Extraction Method

以前馈型BP神经网络进行双目立体视觉系统的摄像机标定研究,基于Harris角点提取,提出了增加约束的改进方法,从而提高网络训练样本集的数据精度;探讨了神经网络的欠泛化、过泛化问题,综合运用归一化、提前终止等多种策略,进一步提高网络泛化能力,并与经典标定方法进行对比。试验结果表明,该方法能够获得较高的摄像机标定精度。

Camera calibration in a binocular stereo vision system was studied based on BP neural network techniques. A neural network was built to investigate the relationship between the image coordinates and the space coordinates. To improve the accuracy of training data, a corner extraction algorithm based on Harris algorithm was modified by increasing constraints. The generation ability of neural networks was discussed, and was further improved by synthesizing many strategies such as the regularization and stopped training strategies. At last, compared with the traditional calibration method, the test result shows that this method is available and can get a higher precision for binocular camera calibration.