ZHONG Jianbo, LI Maozhong, XIA Qingsong, LUO Yongfang, JIA Yuchao, WANG Caiping, LI Hongbin, LUO Hong, HUANG Pan. Fast Focal Length Measurement Method based on Infrared Lens Images[J]. Infrared Technology , 2021, 43(6): 583-586.
Citation: ZHONG Jianbo, LI Maozhong, XIA Qingsong, LUO Yongfang, JIA Yuchao, WANG Caiping, LI Hongbin, LUO Hong, HUANG Pan. Fast Focal Length Measurement Method based on Infrared Lens Images[J]. Infrared Technology , 2021, 43(6): 583-586.

Fast Focal Length Measurement Method based on Infrared Lens Images

More Information
  • Received Date: April 29, 2019
  • Revised Date: June 09, 2021
  • Accurately measuring the focal length of an infrared lens is a crucial issue in infrared lens parameter measurement. This paper proposes a practical focal length estimation method based on a target knife image. First, the target image is captured in the focused state and a binary image is obtained, then the edge of the target is extracted, the vertex coordinates of the minimum external rectangle are obtained, and the corresponding focal length of the infrared lens is estimated. Experimental results show that the algorithm can measure the focal length of the infrared lens quickly and accurately, and the average absolute error percentage is less than 1.48. This method lays the foundation for the rapid measurement of infrared lens parameters.
  • [1]
    许士文. 红外成像系统测试与评价[M]. 北京: 红外与激光工程, 2008: 150-180.
    [2]
    Ohtsu N. A threshold selection method from gray-level histograms[J]. IEEE Transactions on Systems Man & Cybernetics, 1979, 9(1): 62-66. http://ieeexplore.ieee.org/document/4310076/citations
    [3]
    Imocha Singh, Tejmani Sinam. Local contrast and mean based thresholding technique in image binarization[J]. International Journal of Computer Applications, 2012, 51(6): 5-10. http://connection.ebscohost.com/c/articles/82151094/local-contrast-mean-based-thresholding-technique-image-binarization
    [4]
    赵文涛, 曹昕鸷, 田志勇. 基于自适应阈值区域生长的红外舰船目标分割方法[J]. 红外技术, 2018, 40(2): 158-163. http://hwjs.nvir.cn/article/id/hwjs201802010

    ZHAO Wentao, CAO Xinzhi, TIAN Zhiyong. An infrared ship target segmentation method based on adaptive threshold region growth[J]. Infrared Technology, 2018, 40(2): 158-163. http://hwjs.nvir.cn/article/id/hwjs201802010
    [5]
    郝争辉, 张学松, 王高, 等. 基于边缘轮廓线提取的自动对焦评价函数[J]. 红外技术, 2018, 40(2): 170-175. http://hwjs.nvir.cn/article/id/hwjs201802012

    HAO Zhenghui, ZHANG Xuesong, WANG Gao, et al. Auto focusing evaluation function based on edge contour extraction[J]. Infrared Technology, 2018, 40(2): 170-175. http://hwjs.nvir.cn/article/id/hwjs201802012
    [6]
    Gábor Domokos, Zsolt Lángi, Márk Mezei. A shape evolution model under affine transformations[J/OL][2017-09-18]. arXiv: 1604.07630 (https://arxiv.org/abs/1604.07630v2)
  • Related Articles

    [1]WANG Guiquan, XU Zhiwen, DUAN Yongjin, SHI Haokun, JIANG Xuke, LI Yansheng, ZHANG Yuxuan, ZHANG Jie. An Infrared Micro Scanner Measurement and Calibration Method Based on Image Processing[J]. Infrared Technology , 2022, 44(9): 964-971.
    [2]HAO Zhenghui, ZHANG Xuesong, WANG Gao, DENG Fangfang, WEI Xuan, YUAN Dongfang. Auto Focusing Evaluation Function Based on Edge Contour Extraction[J]. Infrared Technology , 2018, 40(2): 170-175.
    [3]XIA Qing, HU Zhen-qi, XU Li-jiang, WANG Hai-juan, ZHANG Yan. A Modified Edge Extraction Algorithm of Infrared Thermal Image Based on Sobel Operator[J]. Infrared Technology , 2015, (6): 462-466.
    [4]XIA Qing, CHEN Ya-kai, ZHANG Zhen-xin, DU Xiang-yu, WANG Hai-juan, XU Li-jiang. Edge Extraction Algorithm of Infrared Thermal Image Based on Laplace Operator and Gray Theory[J]. Infrared Technology , 2014, 36(5): 377-380,388.
    [5]Edge Detection Of Infrared Image using Chirplet Dimension[J]. Infrared Technology , 2011, 33(7): 424-428. DOI: 10.3969/j.issn.1001-8891.2011.07.011
    [6]LUO Zhong-liang, LI Xin. A Novel Method of Wavelet-based Edge Extraction of Infrared Image[J]. Infrared Technology , 2006, 28(8): 456-459. DOI: 10.3969/j.issn.1001-8891.2006.08.006
    [7]CAO Zhan-hui, LI Yan-jun, ZHANG Ke, WU Pan-long. A Novel Linear Edge Extraction Method Based on Gaussian Function[J]. Infrared Technology , 2006, 28(4): 207-209. DOI: 10.3969/j.issn.1001-8891.2006.04.006
    [8]ZHANG Bin, HE Sai-xian. Improved Edge-Detection Method Based On Canny Algorithm[J]. Infrared Technology , 2006, 28(3): 165-169. DOI: 10.3969/j.issn.1001-8891.2006.03.011
    [9]YU Rui-xing, LI Yan-jun, ZHANG Ke. Infrared Image Edge Detection Using Improved Bubble Function[J]. Infrared Technology , 2006, 28(1): 36-38. DOI: 10.3969/j.issn.1001-8891.2006.01.009
    [10]Infrared Image Edge Withdrawing Research Based on Wavelet Transform[J]. Infrared Technology , 2003, 25(6): 31-33. DOI: 10.3969/j.issn.1001-8891.2003.06.009
  • Cited by

    Periodical cited type(3)

    1. 张绘敏,赵扬,康会峰. 基于卷积神经网络算法的光伏组件热斑图像检测方法研究. 计算机测量与控制. 2024(07): 57-63 .
    2. 杨俊,高昱峰,张可,汪银,张雅琳,夏娜,姚钢. 基于图像边缘检测和法向探测的导线覆冰监测方法. 电网与清洁能源. 2023(02): 24-32 .
    3. 穆莉莉,汪晨灿,储汇,宋陈. 基于机器视觉的位移检测算法. 洛阳理工学院学报(自然科学版). 2022(04): 64-70 .

    Other cited types(2)

Catalog

    Article views (355) PDF downloads (78) Cited by(5)
    Related

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return