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| Borgetto, Manon. |
| In the underwater environment, an image mosaic allows to obtain a panoramic view of a site of interest. The image sequence, used to create such mosaic, is acquired by a moving vehicle. The vehicle trajectory is estimated by a simple speed vector integration. As a consequence, a drift appears. This is directly palpable on the mosaic, especially when the vehicle crosses its own trajectory (at "rendezvous" times). This work consists in estimating as precisely as possible, the trajectory from angle and speed measurements, by taking into account the rendezvous times. First, the couples of rendezvous times are detected, then they are introduced in the vehicle localization algorithm. Second, the mosaic is created from these estimated positions. The proposed... |
| Tipo: Text |
Palavras-chave: Enhancement; Warping; Fusion; Motion estimation; Gyro doppler system; Position estimation; Underwater image; Mosaic; Localization; Amélioration; Déformation; Fusion; Estimation du mouvement; Estimation de position; Mise en correspondance; Système gyro doppler; Image sous marine; Mosaïque; Localisation. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/these-355.pdf |
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| Marcon, Yann; Sahling, Heiko; Allais, Anne-gaelle; Bohrmann, Gerhard; Olu, Karine. |
| The Regab pockmark is a large cold seep area located 10 km north of the Congo deep sea channel at about 3160 m water depth. The associated ecosystem hosts abundant fauna, dominated by chemosynthetic species such as the mussel Bathymodiolus aff. boomerang, vestimentiferan tubeworm Escarpia southwardae, and vesicomyid clams Laubiericoncha chuni and Christineconcha regab. The pockmark was visited during the West African Cold Seeps (WACS) cruise with RV Pourquoi Pas? in February 2011, and a 14,000-m2 high-resolution videomosaic was constructed to map the most populated area and to describe the distribution of the dominant megafauna (mussels, tubeworms and clams). The results are compared with previous published works, which also included a videomosaic in the... |
| Tipo: Text |
Palavras-chave: Cold seep; Fauna; Mosaic; Pockmark; Regab; Temporal variation. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00144/25528/23765.pdf |
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