Papers by Luisella Pejrani
con L. Pejrani Baricco, E. Bedini, E. Petiti, in Du Royaume goth au Midi mérovingien, 34e journée... more con L. Pejrani Baricco, E. Bedini, E. Petiti, in Du Royaume goth au Midi mérovingien, 34e journées internationales d’archéologie mérovingienne - Association Française d’Archéologie Mérovingienne (Toulouse, France, 6-8 novembre 2013), eds. E. Boube, A. Corrochano, J. Hernandez, Bordeaux, 2019, pp. 373-379.
Motion segmentation is an old problem that is receiving renewed interest because of its role in v... more Motion segmentation is an old problem that is receiving renewed interest because of its role in video analysis. In this paper, we present a Semi-Nonnegative Matrix Factorization (SNMF)method that models dense point tracks in terms of their optical flow, and decomposes sets of point tracks into semantically meaningful motion components. We show that this formulation of SNMF with missing values outperforms the state-of-the-art algorithm of Brox and Malik in terms of accuracy on 10frame video segments from the Berkeley test set, while being over 100 times faster. We then show how SNMF can be applied to longer videos using sliding windows. The result is competitive in terms of accuracy with Brox and Malik's algorithm, while still being two orders of magnitude faster.
con L. Pejrani Baricco, E. Bedini, E. Petiti, in Du Royaume goth au Midi mérovingien, 34e journée... more con L. Pejrani Baricco, E. Bedini, E. Petiti, in Du Royaume goth au Midi mérovingien, 34e journées internationales d’archéologie mérovingienne - Association Française d’Archéologie Mérovingienne (Toulouse, France, 6-8 novembre 2013), eds. E. Boube, A. Corrochano, J. Hernandez, Bordeaux, 2019, pp. 373-379.
Nature Communications
Despite centuries of research, much about the barbarian migrations that took place between the fo... more Despite centuries of research, much about the barbarian migrations that took place between the fourth and sixth centuries in Europe remains hotly debated. To better understand this key era that marks the dawn of modern European societies, we obtained ancient genomic DNA from 63 samples from two cemeteries (from Hungary and Northern Italy) that have been previously associated with the Longobards, a barbarian people that ruled large parts of Italy for over 200 years after invading from Pannonia in 568 CE. Our dense cemetery-based sampling revealed that each cemetery was primarily organized around one large pedigree, suggesting that biological relationships played an important role in these early medieval societies. Moreover, we identified genetic structure in each cemetery involving at least two groups with different ancestry that were very distinct in terms of their funerary customs. Finally, our data are consistent with the proposed long-distance migration from Pannonia to Northern Italy.
The Gothic family group from Collegno (Piedmont, province of Turin), in: Boube E., Corrochano A., Hernandez J. (eds.), Du Royaume Goth au midi Mérovingien, Actes des 34e Journées d’Archéologie Mérovingienne de Toulouse, 6, 7, et 8 Novembre 2013: 373 - 379., 2019
Duplum by Luisella Pejrani
Current Biology, 2023
Fine-scale sampling uncovers the complexity of migrations in 5th-6th century Pannonia Highlights ... more Fine-scale sampling uncovers the complexity of migrations in 5th-6th century Pannonia Highlights d Novel genomic data from 53 individuals from 5th-8th century Europe were generated d The sites exhibit significant genetic diversity comparable to large swaths of Europe d Associations between genomic ancestry and burial customs vary in the analyzed sites d Spatial modeling analyses indicate gene flow from northern Europe into Pannonia
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Papers by Luisella Pejrani
Duplum by Luisella Pejrani