摘要
针对显微图像测量系统的特点,提出了一种结合标准显微标尺的标定方法.该方法首先获取己知尺寸的显微标尺图像,接着通过预处理及边缘检测分离出图像中的标尺刻度线,然后基于Hough识别出长刻度线,并计算刻度线对应的像素距离,从而计算出标定系数.标定过程中釆用了现有的显微刻度尺,使用方便.实验结果表明,该方法标定精度较高.
A camera calibration method for micro-image measuring system is presented. Firstly the micro image of known size microscopic scale is obtained. Followed by pre-processing and edge detection, ruler lines can be cut out from the image. Then based on Hough lines, the longer ruler lines can be identified. So the calibration factor can be calculated by the physical distance and the corresponding pixel distance of the lines. The calibration objects are existing microscopic scales, so this method is easily applied. The experimental results show that calibration precision is high.
出处
《计算机系统应用》
2014年第12期160-164,共5页
Computer Systems & Applications
基金
浙江省自然科学基金(LY13F020029)
宁波市重点科技计划项目(2013C11032)
关键词
显微测量
图像标定
HOUGH变换
图像处理
microscopical measuring
camera calibration
Hough transform
image processing
