摘要
在层削照相测量装置中,由于摄像装置所处的角度以及摄像镜头差,会导致获取的图像存在非线性几何畸变。因此在对图像进行重建之前,需要对获取的图像进行几何校正。为此,论文提出了一种基于网格图像的几何校正算法,该算法运用分段插值的思想,利用分块低次插值去逼近几何畸变,达到高次插值的效果。最后的分析结果表明,利用60X60正方形网格,该算法的校正误差不超过0.1个像素,能够有效校正图像的综合畸变。
In the cross-sectional imaging measurement system,deformation will be caused by the installation place and the lens distortion of the camera.Before using the slices,which are taken from the system,to reconstruct the three-di-mension entity,calibration is needed to get a good reconstruction result.Therefore the authors put forward a calibration algorithm based on the grid image,which uses subdivision interpolation to approach the deformation and get a result of high-order interpolation.At last the experiment result shows that the calibration error is less than0.1pixel using60X60grid images,and it can effectively calibrate the synthetical deformations of the image.
出处
《计算机工程与应用》
CSCD
北大核心
2004年第2期4-6,共3页
Computer Engineering and Applications
基金
航空科学基金(编号:00H53076)
西北工业大学研究生创业种子基金(编号:Z20030052)
关键词
几何校正
双线性插值
层削照相测量装置
Geometry calibration,Bilinear interpolation,Cross-sectional imaging measurement system
