Search Results for author: Daniel Pizarro

Found 13 papers, 1 papers with code

Using Perspective-n-Point Algorithms for a Local Positioning System Based on LEDs and a QADA Receiver

no code implementations6 Feb 2024 Elena Aparicio-Esteve, Jesús Ureña, Álvaro Hernández, Daniel Pizarro, David Moltó

This work investigates the use of different state-of-the-art PnP algorithms to localize the receiver in a large space based on four co-planar transmitters and with a distance from transmitters to receiver of 3. 4 m. Encoding techniques are used to permit the simultaneous emission of all the transmitted signals and their processing in the receiver.

Position

Robust Isometric Non-Rigid Structure-from-Motion

no code implementations9 Oct 2020 Shaifali Parashar, Adrien Bartoli, Daniel Pizarro

Step 1 computes the optical flow from correspondences, step 2 reconstructs each 3D point's normal vector using multiple reference images and integrates them to form surfaces with the best reference and step 3 rejects the 3D points that break isometry in their local neighborhood.

Optical Flow Estimation

Deep Shape-from-Template: Wide-Baseline, Dense and Fast Registration and Deformable Reconstruction from a Single Image

no code implementations19 Nov 2018 David Fuentes-Jimenez, David Casillas-Perez, Daniel Pizarro, Toby Collins, Adrien Bartoli

Compared to previous non-DNN SfT methods, it does not involve numerical optimization at run-time, and is a dense, wide-baseline solution that does not demand, and does not suffer from, feature-based matching.

3D Reconstruction Object

Self-Calibrating Isometric Non-Rigid Structure-from-Motion

no code implementations ECCV 2018 Shaifali Parashar, Adrien Bartoli, Daniel Pizarro

We present self-calibrating isometric non-rigid structure- from-motion (SCIso-NRSfM), the first method to reconstruct a non-rigid object from at least three monocular images with constant but unknown focal length.

Solutions of Quadratic First-Order ODEs applied to Computer Vision Problems

no code implementations11 Oct 2017 David Casillas-Perez, Daniel Pizarro, Manuel Mazo, Adrien Bartoli

It is an important problem as it does not need initial conditions to obtain the unique solution and its the frequent solution that practical algorithms of the state-of-the-art give.

Inextensible Non-Rigid Shape-From-Motion by Second-Order Cone Programming

no code implementations CVPR 2016 Ajad Chhatkuli, Daniel Pizarro, Toby Collins, Adrien Bartoli

We show for the first time how to construct a Second-Order Cone Programming (SOCP) problem for Non-Rigid Shape-from-Motion (NRSfM) using the Maximum-Depth Heuristic (MDH).

3D Reconstruction

Isometric Non-Rigid Shape-From-Motion in Linear Time

no code implementations CVPR 2016 Shaifali Parashar, Daniel Pizarro, Adrien Bartoli

We study Isometric Non-Rigid Shape-from-Motion (Iso-NRSfM): given multiple intrinsically calibrated monocular images, we want to reconstruct the time-varying 3D shape of an object undergoing isometric deformations.

As-Rigid-As-Possible Volumetric Shape-From-Template

no code implementations ICCV 2015 Shaifali Parashar, Daniel Pizarro, Adrien Bartoli, Toby Collins

Volumetric SfT uses the object's full volume to express the deformation constraints and reconstructs the object's surface and interior deformation.

Object

Shape-From-Template in Flatland

no code implementations CVPR 2015 Mathias Gallardo, Daniel Pizarro, Adrien Bartoli, Toby Collins

We focus on isometric deformations, for which 2DSfT is a well-posed problem, and admits an analytical local solution which may be used to initialize nonconvex refinement.

Stable Template-Based Isometric 3D Reconstruction in All Imaging Conditions by Linear Least-Squares

no code implementations CVPR 2014 Ajad Chhatkuli, Daniel Pizarro, Adrien Bartoli

It has been recently shown that reconstructing an isometric surface from a single 2D input image matched to a 3D template was a well-posed problem.

3D Reconstruction

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