Abstract: The present invention relates to a method and system for the optical and geometric calibration of a device configured for reconstructing the three-dimensional shape of an object. The object is reconstructed from a set of images thereof acquired by a plurality of cameras, where said plurality of cameras must necessarily be calibrated so that reconstruction is carried out without errors. In the context of the invention, calibration consists of obtaining the extrinsic parameters of said plurality of cameras; that is, the positions of their optical centers and the spatial orientations of their optical axes.
Type:
Application
Filed:
June 16, 2020
Publication date:
October 13, 2022
Applicant:
INSTITUTO TECNOLÓGICO DE INFORMÁTICA
Inventors:
Juan Carlos Pérez Cortés, Alberto José Pérez Jiménez, Jose Luis Guardiola García
Abstract: The present invention relates to a method of determining the coherence between a physical object and a numerical model representative of the shape of a physical object, wherein a specific use of the method according to the invention is assessing and quantifying manufacturing defects. The method is characterized by a set of steps comprising: capturing multiple images of the physical object; processing the images to produce a second numerical model of the physical object; in a computer, aligning the first numerical model and the second numerical model to generate a third numerical model according to specific sub-steps, wherein the third numerical model comprises a plurality of points representative of the shape of the captured physical object. Compared with the first numerical model, the third numerical model allows determining a measurement of the coherence between the physical object captured by means of images and the first numerical model representative thereof.
Type:
Application
Filed:
April 20, 2021
Publication date:
October 28, 2021
Applicant:
INSTITUTO TECNOLÓGICO DE INFORMÁTICA
Inventors:
Javier Pérez Soler, Alberto José Pérez Jiménez, Juan Carlos Pérez Cortés, Jose Luis Guardiola García
Abstract: Disclosed embodiments include methods and systems for symbolic correction in human-machine interfaces that comprise (a) implementing a language model; (b) implementing a hypothesis model; (c) implementing an error model; and (d) processing a symbolic input message based on weighted finite-state transducers to encode 1) a set of input hypothesis using the hypothesis model, 2) the language model, and 3) the error model to perform correction on the sequential pre-segmented symbolic input message in the human-machine interface. According to a particular embodiment, the processing step comprises a combination of the language model, the hypothesis model, and the error model performed without parsing by employing a composition operation between the transducers and a lowest cost path search, exact or approximate, on the composed transducer.
Type:
Grant
Filed:
June 14, 2012
Date of Patent:
December 1, 2015
Assignee:
ASOCIACION INSTITUTO TECNOLOGICO DE INFORMATICA
Inventors:
Juan Carlos Pérez Cortés, Rafael Llobet Azpitarte, José Ramón Navarro Cerdán, Joaquim Francesc Arlandis Navaro
Abstract: The purpose of this invention is a device and a method which will permit the acquisition and subsequent reconstruction of objects with volume throughout the total external surface. This invention is characterised in that it has a particular mode of acquisition on the free fall object in such a way that there is no support surface which prevents acquisition of the surface which would be hidden by said support. The invention is also characterised by special modes of distribution of the cameras which optimise image capturing and provide useful information in the subsequent reconstruction of the volume through computer means.
Type:
Application
Filed:
December 10, 2009
Publication date:
August 8, 2013
Applicant:
INSTITUTO TECNOLOGICO DE INFORMATICA
Inventors:
Juan Carlos Perez Cortes, Sergio Sáez Barona
Abstract: Disclosed embodiments include methods and systems for symbolic correction in human-machine interfaces that comprise (a) implementing a language model; (b) implementing a hypothesis model; (c) implementing an error model; and (d) processing a symbolic input message based on weighted finite-state transducers to encode 1) a set of input hypothesis using the hypothesis model, 2) the language model, and 3) the error model to perform correction on the sequential pre-segmented symbolic input message in the human-machine interface. According to a particular embodiment, the processing step comprises a combination of the language model, the hypothesis model, and the error model performed without parsing by employing a composition operation between the transducers and a lowest cost path search, exact or approximate, on the composed transducer.
Type:
Application
Filed:
June 14, 2012
Publication date:
December 20, 2012
Applicant:
ASOCIACION INSTITUTO TECNOLOGICO DE INFORMATICA
Inventors:
Juan Carlos Pérez Cortés, Rafael Llobet Azpitarte, José Ramón Navarro Cerdán, Joaquim Francesc Arlandis Navaro