Jie Liu, Geng Zhang, Xiangpeng Feng, Zhinan Zhang, Siyuan Li, Bingliang Hu. High Precision Centroid Location Algorithm Based on Cubic Spline Fitting and Interpolation[J]. Acta Optica Sinica, 2021, 41(12): 1212004
- Acta Optica Sinica
- Vol. 41, Issue 12, 1212004 (2021)
Fig. 1. Star centroid location algorithm based on double error suppression
Fig. 2. The pseudo code of the interpolation fitting part of proposed algorithm
Fig. 3. Ideal star image. (a) Grayscale image; (b) three-dimensional image
Fig. 4. RMS of location error with spline fitting under different SNR
Fig. 5. RMS of location error with spline interpolation under different SNR
Fig. 6. RMS of location error with different error suppression
Fig. 7. The maximum location error and minimum error with different error suppression
Fig. 8. Star image in the instrument
Fig. 9. Location results of star images in the instrument
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Table 1. Suppression effect of spline fitting on location error under different SNRunit:pixel
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Table 2. Suppression effect of spline interpolation on location error under different SNRunit:pixel
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Table 3. Location effect with different error suppressionunit:pixel
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