Junfeng Xie, Hong Zhu, Pin Li, Fan Mo, Xiang Li. Stellar Image Denoising Method for Active Pixel Sensor Based on Dynamic Sequential Noise Template[J]. Acta Optica Sinica, 2019, 39(3): 0315006
- Acta Optica Sinica
- Vol. 39, Issue 3, 0315006 (2019)
Fig. 1. Schematic of multi-frame continuous stellar image. (a) First frame; (b) second frame; (c) kth frame
Fig. 2. Flow chart of stellar image sequence denoising
Fig. 3. Schematic of acquisition of static background noise
Fig. 4. Original stellar images. (a) First frame; (b) 55th frame; (c) 124th frame
Fig. 5. Background noise. (a) Template; (b) three-dimensional view
Fig. 6. Comparison of stellar images before and after denoising. (a) Before denoising; (b) after denoising
Fig. 7. Partial enlargement images. (a) Before denoising; (b) after denoising
Fig. 8. Comparison of results of many denoising methods. (a) Gaussian filtering; (b) global threshold method; (c) static background template; (d) proposed method
Fig. 9. Test results of first frame stellar image. (a) Extracted centroid coordinates; (b) star angular distance error
Fig. 10. Star angular distance error. (a) Gaussian filtering; (b) global threshold segmentation; (c) static noise template; (d) dynamic background noise template
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Table 1. Parameters of ZY-3 01/02 star stacker component 1 (APS)
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