A Geometric Representation of Shape for Pattern Recognition
30 Outubro 2014 ·
- Quem: Marcelo Cicconet, New York University
- Onde: FGV - Praia de Botafogo, 190, room 317
- Quando: 30 de Outubro de 2014 às 16:00h
A pair of rooted tangents (equivalent to a triangle) is proposed as the primitive to represent and study planar shapes. How “isosceles” and how “degenerate” these triangles are correspond to the mirror and parallel symmetry of such pairs. Symmetry values are accumulated in a 6-dimensional histogram. By marginalizing this histogram, we capture geometric properties for a range of applications: detection of nearly-circular cells; location of the reflection symmetry axis; detection of cell-division in movies of developing embryos; detection of worm-tips and indirect cell-counting. The corresponding algorithms display state-of-the-art performance. We also consider a multilayer geometric representation in which pairs of triangles are used to fit multiple and overlapping ellipses. This work corresponds to publications at CVPR 2014 and ICIP 2014.
Speaker
Marcelo Cicconet, Master in Pure Mathematics and a Ph.D in Computer Graphics (IMPA). He’s an assistant research scientist at New York University. Interests: Computer Vision, Machine Learning, Computer Science, Data Mining, Artificial Intelligence, and Education.
Important
- Not required a confirmation.
- FGV not allow the entrance of people wearing shorts and/or slippers.