摘要
线扫描相机由于其高分辨率以及高数据处理效率的优势,使得其在测量领域的应用越来越广泛。但线扫描相机也会因光学系统畸变的存在影响成像的几何位置精度,造成图像的失真。文章面向线扫描相机标定及畸变矫正的应用需求,提出一种将一维数据映射到二维数据而不改变原始数据的方法,以利用面阵相机的标定方法来标定线扫描相机。在标定过程中,采用新型的标定板来创建世界坐标系与图像坐标系之间的关系。文章利用数字图像处理的方法,对光学镜头自身畸变进行标定和矫正,基本消除了由于图像变形而产生的测量误差,有效解决了由于镜头畸变而降低图像中物体的几何位置精度的问题。
Line scan cameras are more and more widely used in measurement filed owning to their high resolution and high data-processing efficiency. However, optical distortion of the line scan camera can have direct impact on the accuracy of geometric position, and even results in a failure to image. In this paper, a method mapping data from one dimension to two dimension without changing the original ones is proposed to calibrate the line scan camera using the existing area-based calibration method. During the calibration, a new calibration pattern is used to correlate the world coordinate system and the image coordinate system. The digital image processing method is used to calibrate and correct the distortion of the optical lens, which basically eliminates the measurement error caused by the image deformation and effectively solves the problem of reducing the accuracy of geometric position due to the lens distortion.
出处
《航天返回与遥感》
CSCD
北大核心
2017年第6期46-53,共8页
Spacecraft Recovery & Remote Sensing
基金
国家重大科学仪器设备开发专项(2013YQ350747)
关键词
图像处理
相机标定
畸变矫正
线扫描相机
image processing
camera calibration
distortion correction
line scan camera
