際際滷shows by User: VincentAgnus / http://www.slideshare.net/images/logo.gif 際際滷shows by User: VincentAgnus / Tue, 11 Nov 2014 15:18:37 GMT 際際滷Share feed for 際際滷shows by User: VincentAgnus Illumination Independent Marker Tracking using Cross-Ratio Invariance /VincentAgnus/vag-slides vagslides-141111151837-conversion-gate01
VRST2014 presentation Marker tracking is used in numerous applications. Depending on the context and its constraints, tracking accuracy can be a crucial component of the application. In this paper, we firstly highlight that the tracking accuracy depends on the illumination, which is usually not controlled in most applications. Particularly, we show how corner detection can shift of several pixels when light power or background context change, even if the camera and the marker are static in the scene. Then, we propose a method, based on the cross ratio invariance, that allows to re-estimate the corner extraction so that the cross ratio of the marker model corresponds to the one computed from the extracted corners in the image. Finally, we show on real data that our approach improves the tracking accuracy, particularly along the camera depth axis, up to several millimeters, depending on the marker depth.]]>
VRST2014 presentation Marker tracking is used in numerous applications. Depending on the context and its constraints, tracking accuracy can be a crucial component of the application. In this paper, we firstly highlight that the tracking accuracy depends on the illumination, which is usually not controlled in most applications. Particularly, we show how corner detection can shift of several pixels when light power or background context change, even if the camera and the marker are static in the scene. Then, we propose a method, based on the cross ratio invariance, that allows to re-estimate the corner extraction so that the cross ratio of the marker model corresponds to the one computed from the extracted corners in the image. Finally, we show on real data that our approach improves the tracking accuracy, particularly along the camera depth axis, up to several millimeters, depending on the marker depth.]]> Tue, 11 Nov 2014 15:18:37 GMT /VincentAgnus/vag-slides VincentAgnus@slideshare.net(VincentAgnus) Illumination Independent Marker Tracking using Cross-Ratio Invariance VincentAgnus VRST2014 presentation Marker tracking is used in numerous applications. Depending on the context and its constraints, tracking accuracy can be a crucial component of the application. In this paper, we firstly highlight that the tracking accuracy depends on the illumination, which is usually not controlled in most applications. Particularly, we show how corner detection can shift of several pixels when light power or background context change, even if the camera and the marker are static in the scene. Then, we propose a method, based on the cross ratio invariance, that allows to re-estimate the corner extraction so that the cross ratio of the marker model corresponds to the one computed from the extracted corners in the image. Finally, we show on real data that our approach improves the tracking accuracy, particularly along the camera depth axis, up to several millimeters, depending on the marker depth. <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/vagslides-141111151837-conversion-gate01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> VRST2014 presentation Marker tracking is used in numerous applications. Depending on the context and its constraints, tracking accuracy can be a crucial component of the application. In this paper, we firstly highlight that the tracking accuracy depends on the illumination, which is usually not controlled in most applications. Particularly, we show how corner detection can shift of several pixels when light power or background context change, even if the camera and the marker are static in the scene. Then, we propose a method, based on the cross ratio invariance, that allows to re-estimate the corner extraction so that the cross ratio of the marker model corresponds to the one computed from the extracted corners in the image. Finally, we show on real data that our approach improves the tracking accuracy, particularly along the camera depth axis, up to several millimeters, depending on the marker depth.
Illumination Independent Marker Tracking using Cross-Ratio Invariance from Vincent Agnus
]]> 1145 2 https://cdn.slidesharecdn.com/ss_thumbnails/vagslides-141111151837-conversion-gate01-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 C++ Metaprogramming : multidimensional typelist https://fr.slideshare.net/slideshow/c-metaprogramming-multidimensional-typelist/5276875 devforum-typlelist-vagnus18sept2008-final-100924082522-phpapp02
use c++ metaprogramming to manage typelist and how build multi-dimensionnal typelist]]>
use c++ metaprogramming to manage typelist and how build multi-dimensionnal typelist]]> Fri, 24 Sep 2010 08:25:12 GMT https://fr.slideshare.net/slideshow/c-metaprogramming-multidimensional-typelist/5276875 VincentAgnus@slideshare.net(VincentAgnus) C++ Metaprogramming : multidimensional typelist VincentAgnus use c++ metaprogramming to manage typelist and how build multi-dimensionnal typelist <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/devforum-typlelist-vagnus18sept2008-final-100924082522-phpapp02-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> use c++ metaprogramming to manage typelist and how build multi-dimensionnal typelist
from Vincent Agnus
]]> 1520 2 https://cdn.slidesharecdn.com/ss_thumbnails/devforum-typlelist-vagnus18sept2008-final-100924082522-phpapp02-thumbnail.jpg?width=120&height=120&fit=bounds presentation Black http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 PyMetris : A flexible Endoscope Tracker /slideshow/pymetris-a-flexible-endoscope-tracker/5234716 pymetrisvag-100919144429-phpapp01
A python application for tracking a flexible endoscope using a magnetic tracking system]]>
A python application for tracking a flexible endoscope using a magnetic tracking system]]> Sun, 19 Sep 2010 14:44:16 GMT /slideshow/pymetris-a-flexible-endoscope-tracker/5234716 VincentAgnus@slideshare.net(VincentAgnus) PyMetris : A flexible Endoscope Tracker VincentAgnus A python application for tracking a flexible endoscope using a magnetic tracking system <img style="border:1px solid #C3E6D8;float:right;" alt="" src="https://cdn.slidesharecdn.com/ss_thumbnails/pymetrisvag-100919144429-phpapp01-thumbnail.jpg?width=120&amp;height=120&amp;fit=bounds" /><br> A python application for tracking a flexible endoscope using a magnetic tracking system
PyMetris : A flexible Endoscope Tracker from Vincent Agnus
]]> 799 2 https://cdn.slidesharecdn.com/ss_thumbnails/pymetrisvag-100919144429-phpapp01-thumbnail.jpg?width=120&height=120&fit=bounds presentation White http://activitystrea.ms/schema/1.0/post http://activitystrea.ms/schema/1.0/posted 0 https://cdn.slidesharecdn.com/profile-photo-VincentAgnus-48x48.jpg?cb=1669759029 https://cdn.slidesharecdn.com/ss_thumbnails/vagslides-141111151837-conversion-gate01-thumbnail.jpg?width=320&height=320&fit=bounds VincentAgnus/vag-slides Illumination Independe... https://cdn.slidesharecdn.com/ss_thumbnails/devforum-typlelist-vagnus18sept2008-final-100924082522-phpapp02-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/c-metaprogramming-multidimensional-typelist/5276875 C++ Metaprogramming : ... https://cdn.slidesharecdn.com/ss_thumbnails/pymetrisvag-100919144429-phpapp01-thumbnail.jpg?width=320&height=320&fit=bounds slideshow/pymetris-a-flexible-endoscope-tracker/5234716 PyMetris : A flexible ...