IRIM at TRECVID 2011: Semantic Indexing and Instance Search

12 pages - TRECVID workshop notebook papers/slides available at http://www-nlpir.nist.gov/projects/tvpubs/tv.pubs.org.htmlInternational audienceThe IRIM group is a consortium of French teams work- ing on Multimedia Indexing and Retrieval. This paper describes its participation to the TRECVID 2011 se- mantic indexing and instance search tasks. For the semantic indexing task, our approach uses a six-stages processing pipelines for computing scores for the likeli- hood of a video shot to contain a target concept. These scores are then used for producing a ranked list of im- ages or shots that are the most likely to contain the tar- get concept. The pipeline is composed of the following steps: descriptor extraction, descriptor optimization, classification, fusion of descriptor variants, higher-level fusion, and re-ranking. We evaluated a number of dif- ferent descriptors and tried different fusion strategies. The best IRIM run has a Mean Inferred Average Pre- cision of 0.1387, which ranked us 5th out of 19 partic- ipants. For the instance search task, we we used both object based query and frame based query. We formu- lated the query in standard way as comparison of visual signatures either of object with parts of DB frames or as a comparison of visual signatures of query and DB frames. To produce visual signatures we also used two apporaches: the first one is the baseline Bag-Of-Visual- Words (BOVW) model based on SURF interest point descriptor; the second approach is a Bag-Of-Regions (BOR) model that extends the traditional notion of BOVW vocabulary not only to keypoint-based descrip- tors but to region based descriptors

IRIM at TRECVID2009: High Level Feature Extraction

International audienceThe IRIM group is a consortium of French teams working on Multimedia Indexing and Retrieval. This paper describes our participation to the TRECVID 2009 High Level Features detection task. We evaluated a large number of different descriptors (on TRECVID 2008 data) and tried different fusion strategies, in particular hierarchical fusion and genetic fusion. The best IRIM run has a Mean Inferred Average Precision of 0.1220, which is significantly above TRECVID 2009 HLF detection task median performance. We found that fusion of the classification scores from different classifier types improves the performance and that even with a quite low individual performance, audio descriptors can help

IRIM at TRECVID 2010: Semantic Indexing and Instance Search

International audienceThe IRIM group is a consortium of French teams working on Multimedia Indexing and Retrieval. This paper describes our participation to the TRECVID 2010 semantic indexing and instance search tasks. For the semantic indexing task, we evaluated a number of different descriptors and tried different fusion strategies, in particular hierarchical fusion. The best IRIM run has a Mean Inferred Average Precision of 0.0442, which is above the task median performance. We found that fusion of the classification scores from different classifier types improves the performance and that even with a quite low individual performance, audio descriptors can help. For the instance search task, we used only one of the example images in our queries. The rank is nearly in the middle of the list of participants. The experiment showed that HSV features outperform the concatenation of HSV and Edge histograms or the Wavelet features

Régime alimentaire du Héron garde-bœuf à la limite de son expansion géographique récente

A brief review of the Cattle Egret’s diet in the World shows that it is predominantly insectivorous. In the Camargue, the feeding biotopes differ throughout the year. Meadows and stubble fields are used in winter, whereas in spring and summer they feed in wetlands (marshes and flooded rice fields). The diet has been determined by direct observations on the feeding ground, and varies greatly from one season to another. During the summer, mainly insects are taken (Orthoptera and horse-flies) with quite a lot of frogs. In winter the Cattle Egret becomes gradually carnivorous ; earthworms and rodents (voles and mice) form the main prey items, almost exclusively rodents being taken during periods of dry and frosty weather. The variation in prey «accessibility », explains the relationship between the use of feeding biotopes and the diet. During the winter only the easily accessible preys are caught in the only biotopes where they occur whilst in summer the abundance and variety of prey items available allows the cattle egrets to choose its usual prey where this is most abundant. The extraordinary adaptive capacity concerning the feeding habits, allows the species to breed in the Camargue, and, far more surprising, to winter. The expansion in Europe has certainly not yet stopped and the species has recently bred and also wintered in the West of France.Bredin Denis. Régime alimentaire du Héron garde-bœuf à la limite de son expansion géographique récente. In: Revue d'Écologie (La Terre et La Vie), tome 39, n°4, 1984. pp. 431-445

The diet of the cattle egret at the limit of its recent geographic range

Il existe un lien étroit entre le régime alimentaire et le ou les milieux fréquentés par l'oiseau, la fréquentation étant liée à l'accessibilité des proies. Pour hiverner en Camargue Bubulcus ibis doit faire preuve d'une remarquable capacité d'adaptation qui se traduit par une extrême variété du régime alimentaire. Cette capacité est l'une des causes de la réussite de l'espèce et a beaucoup contribué à son expansio

Programme de restauration des potentialités de reproduction des oiseaux de mer sur des îles et îlots de Manche-Atlantique

Bredin Denis. Programme de restauration des potentialités de reproduction des oiseaux de mer sur des îles et îlots de Manche-Atlantique . In: Revue d'Écologie (La Terre et La Vie), tome 59, n°1-2, 2004. p. 350

L'affaire Dreyfus : la Cour de Cassation et l'opinion publique

- I - Le 30 août 1898 dans le bureau de Godefroy Cavaignac, Ministre de la guerre du gouvernement de Brisson, le Colonel Henry a avoué l'un de ses faux. Le lendemain il s'est tranché la gorge dans sa prison du Mont Valérien. Dès le 3 septembre Lucie Dreyfus a déposé sa requête en révision. Brisson, Président du Conseil, dreyfusard convaincu mais prudent, obtient, non sans peine, du gouvernement que la requête de Lucie Dreyfus soit transmise à la Cour de Cassation. « L'affaire était terminée »..

Table ronde sur « Les problèmes de l'organisation judiciaire en Pologne »

Bredin Jean-Denis. Table ronde sur « Les problèmes de l'organisation judiciaire en Pologne ». In: Revue internationale de droit comparé. Vol. 12 N°2, Avril-juin 1960. pp. 385-395

L'évolution du trust dans la jurisprudence française

Bredin Jean-Denis. L'évolution du trust dans la jurisprudence française. In: Travaux du Comité français de droit international privé, 34-36e année, 1973-1975. 1977. pp. 137-160

Le contrôle du juge de l'exequatur au lendemain de l'arrêt Munzer

Bredin Jean-Denis. Le contrôle du juge de l'exequatur au lendemain de l'arrêt Munzer. In: Travaux du Comité français de droit international privé, 25-27e année, 1964-1966. 1967. pp. 19-51