基于光纤内窥镜图像的标定方法  

Calibration method based on optical fiber endoscope image

作　　者：范庆辉 欧峰[1] 袁彪 文勇[1] FAN Qinghui;OU Feng;YUAN Biao;WEN Yong(Institute of General Engineering,China Academy of Engineering Physics,Mianyang Sichuan 621000,China)

机构地区：[1]中国工程物理研究院总体工程研究所,四川绵阳621000

出　　处：《光通信技术》2023年第6期72-76,共5页Optical Communication Technology

摘　　要：光纤内窥镜被广泛应用于复杂结构狭小空间里的破坏损伤探测,但因其固有特性及外界噪声影响致使采集到的图像呈现蜂窝网格状,且存在30%左右的桶形畸变。针对此问题,提出了一种基于光纤内窥镜图像标定方法,首先设计了可自由移动的标定系统,然后采用高斯滤波、二值化处理、mark点识别、畸变矫正等方法对标定板图像中的光纤束进行处理,最后使用该标定方法对光纤内窥镜拍摄的不同类型的标定板图像进行标定矫正。试验结果表明,所提标定方法适合多种场景和不同质量图像的矫正识别,测量误差仅为10μm。Fiber optic endoscope is widely used to detect damage in small space of complex structures,but due to its inherent characteristics and external noise,the acquired images show a honeycomb grid,and there is about 30%barrel distortion.For this problem,a calibration method based on optical fiber endoscope image is proposed.Firstly,a freely moving calibration system is designed,and then the optical fiber bundle in the calibration plate image is processed by Gaussian filtering,binarization processing,mark point identifying and distortion correcting.Finally,the calibration method is used to calibrate and correct different types of calibration plate images taken by optical fiber endoscope.The experimental results show that the proposed calibration method is suitable for correcting and identifying of various scenes and images of different quality,and the measurement error is only 10μm.

关 键 词：光纤内窥镜 标定系统 畸变矫正 微位移 

分 类 号：TN383[电子电信—物理电子学]