Sikang ZENG, Rujin ZHAO, Yuebo MA, Zifa ZHU, Yuping TANG, Zijian ZHU. An Event-based Method for Extracting Star Points from High Dynamic Star Sensors[J]. Acta Photonica Sinica, 2022, 51(9): 0912003
- Acta Photonica Sinica
- Vol. 51, Issue 9, 0912003 (2022)
Fig. 1. Working principle of star sensor
Fig. 2. General extraction process of star point centroid
Fig. 3. Simplified circuit diagram of the event camera pixel
Fig. 4. Working principle of event camera
Fig. 5. Star map in the field of view and simulated star point event stream
Fig. 6. Algorithm flow
Fig. 7. Schematic of spatiotemporal neighborhood
Fig. 8. Schematic of intercepting time slice
Fig. 9. Denoising effect under different noise intensities
Fig. 10. EDP and ESNR under different noises
Fig. 11. Extraction error of centroid under different angular velocities
Fig. 12. Average error of centroid extraction under different angular velocities
Fig. 13. 3D view of the event stream output at low dynamics（
Fig. 14. Average error of centroid extraction under different noise intensities
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Table 1. Parameters of star sensor
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