Search Results - "Martinez, Patrice"

Dimensionality reduction and classification of hyperspectral image data using sequences of extended morphological transformations by Plaza, A., Martinez, P., Plaza, J., Perez, R.

“…This work describes sequences of extended morphological transformations for filtering and classification of high-dimensional remotely sensed hyperspectral…”
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A quantitative and comparative analysis of endmember extraction algorithms from hyperspectral data by Plaza, A., Martinez, P., Perez, R., Plaza, J.

“…Linear spectral unmixing is a commonly accepted approach to mixed-pixel classification in hyperspectral imagery. This approach involves two steps. First, to…”
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Spatial/spectral endmember extraction by multidimensional morphological operations by Plaza, A., Martinez, P., Perez, R., Plaza, J.

“…Spectral mixture analysis provides an efficient mechanism for the interpretation and classification of remotely sensed multidimensional imagery. It aims to…”
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Multiwavelength active optics Shack-Hartmann sensor for seeing and turbulence outer scale monitoring by Martinez, Patrice

“…Real-time seeing and outer scale estimation at the location of the focus of a telescope is fundamental for the adaptive optics systems dimensioning and…”
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Analytical decomposition of Zernike and hexagonal modes over a hexagonal segmented optical aperture by Janin-Potiron, Pierre, Martinez, Patrice, Carbillet, Marcel

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Analytical decomposition of Zernike and hexagonal modes over an hexagonal segmented optical aperture by Janin-Potiron, Pierre, Martinez, Patrice, Carbillet, Marcel

“…Zernike polynomials are widely used to describe the wavefront phase as they are well suited to the circular geometry of various optical apertures…”
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A Whole Earth Telescope campaign on the pulsating subdwarf B binary system PG 1336−018 (NY Vir) by Kilkenny, D., Reed, M. D., O'Donoghue, D., Kawaler, S. D., Mukadam, A., Kleinman, S. J., Nitta, A., Metcalfe, T. S., Provencal, J. L., Watson, T. K., Sullivan, D. J., Sullivan, T., Shobbrook, R., Jiang, X. J., Joshi, S., Ashoka, B. N., Seetha, S., Leibowitz, E., Ibbetson, P., Mendelson, H., Meištas, E., Kalytis, R., Ališauskas, D., Martinez, P., van Wyk, F., Stobie, R. S., Marang, F., Zola, S., Krzesinski, J., Ogłoza, W., Moskalik, P., Silvotti, R., Piccioni, A., Vauclair, G., Dolez, N., Chevreton, M., Dreizler, S., Schuh, S. L., Deetjen, J. L., Solheim, J.-E., Gonzalez Perez, J. M., Ulla, A., Østensen, R., Manteiga, M., Suarez, O., Burleigh, M., Kepler, S. O., Kanaan, A., Giovannini, O.

“…We present results from a multisite (‘Whole Earth Telescope’) photometric campaign on PG 1336−018, the close eclipsing binary system containing a pulsating…”
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Upgrading SPHERE with the second stage AO system SAXO+: non-common path aberrations estimation and correction by Mazoyer, Johan, Goulas, Charles, Vidal, Fabrice, Dinis, Isaac Bernardino, Milli, Julien, Tallon, Michel, Galicher, Raphaël, Absil, Oliver, Béchet, Clémentine, Boccaletti, Anthony, Ferreira, Florian, Langlois, Maud, Martinez, Patrice, Mugnier, Laurent, N'diaye, Mamadou, de Xivry, Gilles Orban, Potier, Axel, Tallon-Bosc, Isabelle, Vigan, Arthur

“…SAXO+ is a planned enhancement of the existing SAXO, the VLT/ SPHERE adaptive optics system, deployed on ESO's Very Large Telescope. This upgrade is designed…”
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Apodized-pupil Lyot coronagraphs: multistage designs for extremely large telescopes by Martinez, Patrice

“…Earlier apodized-pupil Lyot coronagraphs (APLC) have been studied and developed to enable high-contrast imaging for exoplanet detection and characterization…”
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RISTRETTO: reflected-light exoplanet spectroscopy at the diffraction limit of the VLT by Lovis, Christophe, Blind, Nicolas, Chazelas, Bruno, Shinde, Muskan, Bugatti, Maddalena, Restori, Nathanaël, Dinis, Isaac, Genolet, Ludovic, Hughes, Ian, Sordet, Michaël, Schnell, Robin, Rihs, Samuel, Crausaz, Adrien, Turbet, Martin, Billot, Nicolas, Fusco, Thierry, Neichel, Benoit, Sauvage, Jean-François, Diaz, Pablo Santos, Houelle, Mathilde, Blackman, Joshua, Lanotte, Audrey, Kühn, Jonas, Hagelberg, Janis, Guyon, Olivier, Martinez, Patrice, Spang, Alain, Mordasini, Christoph, Ehrenreich, David, Demory, Brice-Olivier, Bolmont, Emeline

“…Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130961I (18 July 2024) RISTRETTO is a visible high-resolution spectrograph fed by…”
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Halftoning for high-contrast imaging by Martinez, P., Dorrer, C., Aller Carpentier, E., Kasper, M., Boccaletti, A., Dohlen, K.

“…High-contrast instruments, such as SPHERE (upcoming planet finder instrument for the ESO-VLT), or EPICS (planet hunter project for the future E-ELT), will…”
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The self-coherent camera as a focal plane fine phasing sensor by Janin-Potiron, Pierre, Martinez, Patrice, Baudoz, Pierre, Carbillet, Marcel

“…Direct imaging of Earth-like exoplanets requires high contrast imaging capability and high angular resolution. Primary mirror segmentation is a key…”
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29 frequencies for the δ Scuti variable BI CMi: the 1997–2000 multisite campaigns by Breger, M., Garrido, R., Handler, G., Wood, M.A., Shobbrook, R.R., Bischof, K.M., Rodler, F., Gray, R. O., Stankov, A., Martinez, P., O'Donoghue, D., Szabó, R., Zima, W., Kaye, A. B., Barban, C., Heiter, U.

“…A multisite campaign of BI CMi was carried out with excellent frequency resolution and high photometric accuracy from 1997 to 2000, including two long…”
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Fine cophasing of segmented aperture telescopes with ZELDA, a Zernike wavefront sensor in the diffraction-limited regime by Janin-Potiron, Pierre, N'Diaye, Mamadou, Martinez, Patrice, Vigan, Arthur, Dohlen, Kjetil, Carbillet, Marcel

“…Segmented aperture telescopes require an alignment procedure with successive steps from coarse alignment to monitoring process in order to provide very high…”
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A genetic algorithm for the detection of 2D geometric primitives in images by Lutton, E., Martinez, P.

“…We investigate the use of genetic algorithms (GAs) for image primitives extraction (such as segments, circles, ellipses or quadrilaterals). This approach…”
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SPEED: the Segmented Pupil Experiment for Exoplanet Detection by Patrice, Martinez, Olivier, Preis, Carole, Gouvret, Julien, Dejongue, Jean-Baptiste, Daban, Alain, Spang, Frantz, Martinache, Mathilde, Beaulieu, Pierre, Janin-Potiron, Lyu, Abe, Yan, Fantei-Caujolle, Damien, Mattei, Sebastien, Ottogali

“…Searching for nearby exoplanets with direct imaging is one of the major scientific drivers for both space and ground-based programs. While the second…”
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Wet Observations of GD 358 in 2000 by Kepler S. O., Nather E.R., Winget D.E., Nitta A., Kleinman S.J., Metcalfe T., Sekiguchi K., Xiaojun J., Sullivan D., Sullivan T., Janulis R., Meištas E.G., Kalytis R., Krzesiński J., Ogłoza W., Zola S., O’Donoghue D., Romero-Colmenero E., Martinez P., Dreizler S., Deetjen J., Nagel T., Schuh S.L., Vauclair G., Fu J.N., Chevreton M., Solheim J.-E., Kanaan A., Costa J.E., Costa A.F. Murillo, Wood M.A., Silvestri N., Ahrens T.J., Jones A. Kyle, Collins A.E., Boyer M., Shaw J.S., Mukadam A.S., Klumpe E.W., Larrison J., Kawaler S.D., Riddle R.L., Ulla A., Bradley P.

“…We report on the 323 hours of nearly uninterrupted time series photometric observations of the DBV star GD 358 acquired with the Whole Earth Telescope (WET)…”
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