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EnglishThe angular differential imaging (ADI) is used to improve contrast in high resolution astronomical imaging. An example is the direct imaging of exoplanet in camera fed by Extreme Adaptive Optics. The subtraction of the main dazzling object to observe the faint companion was improved using Principal Component Analysis (PCA). It factorizes the positive astronomical frames into positive and negative components. On the contrary, the Nonnegative Matrix Factorization (NMF) uses only positive components, mimicking the actual composition of the long exposure images.
| Titolo: | Approximate nonnegative matrix factorization algorithm for the analysis of angular differential imaging data | |
| Autore/i: | Arcidiacono, C.; Simoncini, V. | |
| Autore/i Unibo: | ||
| Anno: | 2018 | |
| Serie: | ||
| Titolo del libro: | Proceedings of SPIE - The International Society for Optical Engineering | |
| Pagina iniziale: | 111 | |
| Pagina finale: | 114 | |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1117/12.2311681 | |
| Abstract: | The angular differential imaging (ADI) is used to improve contrast in high resolution astronomical imaging. An example is the direct imaging of exoplanet in camera fed by Extreme Adaptive Optics. The subtraction of the main dazzling object to observe the faint companion was improved using Principal Component Analysis (PCA). It factorizes the positive astronomical frames into positive and negative components. On the contrary, the Nonnegative Matrix Factorization (NMF) uses only positive components, mimicking the actual composition of the long exposure images. | |
| Data stato definitivo: | 11-feb-2019 | |
| Appare nelle tipologie: | 4.01 Contributo in Atti di convegno |
File in questo prodotto:
| File | Descrizione | Tipo | Licenza | |
|---|---|---|---|---|
| Proceedings10703Spie.pdf | Preprint | Licenza per accesso libero gratuito | Open Access Visualizza/Apri |
http://hdl.handle.net/11585/663352
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