44 citations · 62 across the 4 of their papers we have counts for
5 papers
Face Alignment using a 3D Deeply-initialized Ensemble of Regression Trees
Roberto Valle, José M. Buenaposada, Antonio Valdés +1
Face alignment algorithms locate a set of landmark points in images of faces taken in unrestricted situations. State-of-the-art approaches typically fail or lose accuracy in the pr…
Geometrical analysis of polynomial lens distortion models
José I. Ronda, Antonio Valdés
Polynomial functions are a usual choice to model the nonlinearity of lenses. Typically, these models are obtained through physical analysis of the lens system or on purely empirica…
Autocalibration with the Minimum Number of Cameras with Known Pixel Shape
José I. Ronda, Antonio Valdés, Guillermo Gallego
In 3D reconstruction, the recovery of the calibration parameters of the cameras is paramount since it provides metric information about the observed scene, e.g., measures of angles…
The moduli of G-structures with linear connection
C. Martinez Ontalba, J. Munoz Masque, A. Valdes
The moduli space of jets of certain G-structures (basically those which admit a canonical linear connection) is shown to be isomorphic to the quotient of a natural G-module by G.
The number of functionally independent invariants of a pseudo--Riemannian metric
J Muñoz Masqué, Antonio Valdés
The number of functionally independent scalar invariants of arbitrary order of a generic pseudo--Riemannian metric on an --dimensional manifold is determined.