Rock-Ring Accuracy Improvement in Infrared Satellite Image with Subpixel Edge Detection

  • Huan ZhangEmail author
  • Cai Meng
  • Zhaoxi Li
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 875)


The projection of space circle can be utilized to relative pose measurement of satellite targets. The accuracy of the ellipse parameter is crucial to the pose recovery precision. However, the image quality of space visible image and infrared image are poor. The conventional ellipse detection methods are mainly based on pixel-accuracy-wise edges and the detection accuracy are low which leads to errors in pose recovery. In this paper, a subpixel-accuracy-wise edges based fitting method is proposed to improve the ellipse accuracy. To realize this goal, we design ellipse based subpixel edge detection method. Experimental results show that the ellipse accuracy fitted by subpixel edge coordinate is higher than by pixel edge coordinate, especially when the ellipse is incomplete. Our method is the first one that present and validate that the subpixel edge coordinate is contribute to enhancing ellipse detection accuracy.


Ellipse detection accuracy Subpixel edge detection Pose recovery 


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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.School of AstronauticsBeihang UniversityBeijingChina

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