一种新的基于散焦图像的摄像机标定方法

Novel algorithm of camera calibration based on defocus images

提出一种新的用于散焦求深度的摄像机内参数标定算法。该算法依靠改变摄像机镜头光圈指数获取同一场景的任意两幅散焦程度不同的图像,提取两幅图像间模糊程度差异信息,结合分析透镜成像几何标定出摄像机的相应内参数。此算法解除了2006年由Park所提出的标定方法中必须有一幅聚焦图像的限制,并且无须对图像进行复杂的放大率标准化处理。模拟实验与真实实验均验证了算法的有效性和精确性。

In order to realize precise calibration and restore depth of scene,proposed a novel camera parameter calibration method for DFD.The proposed method estimates blur level difference between the two defocused images of the same scene obtained by changing camera s F number.Then could calibrate the responding camera parameters combining with imaging geometry of the thin lens.This algorithm relieved the request of calibration algorithm given by Park that one of the images used in calibration must be focused.And w...