• Laser & Optoelectronics Progress
  • Vol. 60, Issue 8, 0811029 (2023)
Ting Sun1、2, Na Chen1, Ran Meng2, Qian Long3、*, and Qiwei Xie4
Author Affiliations
  • 1School of Mathematics and Statistics, Hubei University, Wuhan 430062, Hubei, China
  • 2Beijing Smarter Eye Technology Co., Ltd., Beijing 100023, China
  • 3Yunnan Observatories, Chinese Academy of Sciences, Kunming 650000, Yunnan, China
  • 4Research Base of Beijing Modern Manufacturing Development, Beijing University of Technology, Beijing 100124, China
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    DOI: 10.3788/LOP223305 Cite this Article Set citation alerts
    Ting Sun, Na Chen, Ran Meng, Qian Long, Qiwei Xie. High-Precision Binocular Camera Calibration Based on Super-Resolution Corner Point Detection Algorithm[J]. Laser & Optoelectronics Progress, 2023, 60(8): 0811029 Copy Citation Text show less

    Abstract

    Binocular camera calibration is the foundation of stereo vision research, and its accuracy is the key to achieve precision in vision measurement. The basis of camera calibration is image corner extraction, but in real applications, the accuracy of detected corner points is often low due to unclear acquisition of images due to external influences, which affects calibration accuracy. To solve the problem of low-quality corner detection in terms of the feature level, an end-to-end algorithm based on super-resolution subpixel corner detection is proposed. First, the fuzzy kernel of a low-resolution image is estimated using the blind hyperspectral part, and its features are fused to reconstruct its high-resolution version. Subsequently, the subpixel position of the corner points is obtained. Finally, a binocular camera is calibrated with high accuracy and tested via ranging experiments. Experimental results show that the proposed subpixel corner detection method based on super-resolution has advantages in real scenarios.
    sp˜=K[R t]P˜
    K=α   γ   u00   β   v00   0    1
    suv1=Kr1 r2 r3 tXY01=K[r1 r2 t]XY 1
    sp˜=HP˜
    h1TK-TK-1h2=0
    h1TK-TK-1h1=h2TK-TK-1h2
    Y=(KX)u+n
    I1,I2,,Is=split(I)
    βi,γi=splitF(Iȋ)
    di=βiIi+γi
    zi=Convi(di)
    z=Concat(z1,z2,,zs)
    Φhi,j=exphi,jk=1Wl=1Hexphk,l
    ψxh=i=1Mj=1HMi,j,xΦhi,j
    ψyh=i=1Mj=1HMi,j,yΦhi,j
    P=ψyh,ψxhT
    Ting Sun, Na Chen, Ran Meng, Qian Long, Qiwei Xie. High-Precision Binocular Camera Calibration Based on Super-Resolution Corner Point Detection Algorithm[J]. Laser & Optoelectronics Progress, 2023, 60(8): 0811029
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