Aproximación espacio-temporal para la media absoluta de la forma 3d de un objeto proyección de franjas
| dc.contributor.advisor | Meneses Fonseca, Jaime Enrique | |
| dc.contributor.author | Pérez Guzmán, Zayra Milena | |
| dc.date.accessioned | 2024-03-03T16:18:22Z | |
| dc.date.available | 2006 | |
| dc.date.available | 2024-03-03T16:18:22Z | |
| dc.date.created | 2006 | |
| dc.date.issued | 2006 | |
| dc.description.abstract | El uso de proyección de franjas para obtener la topografía de un cuerpo es una técnica que ha sido ampliamente utilizada en aplicaciones industriales y médicas. Franjas paralelas son proyectadas sobre la superficie del objeto a estudiar, ya sea con un sistema convencional de proyección, utilizando una red de paso constante o utilizando patrones de interferencia. Esta técnica proporciona mapas de fase discontinuos, por lo que se hace necesario utilizar algoritmos de corrección de fase (unwrapping). Debido al procesamiento espacial, se propagan errores al identificarse puntos de discontinuidad erróneos causados por la presencia de ruido en regiones de fase mal calculadas. En este trabajo se presenta una metodología que permite calcular la fase continua absoluta de sistemas de franjas proyectados sobre la superficie de objetos que presentan discontinuidades y zonas aisladas. Para este tipo de objetos, el algoritmo clásico presenta errores en el cálculo de la fase relativa. Como alternativa se utilizó el método de corrección de fase temporal, que corrige sin recurrir a la información de píxeles vecinos, es decir zonas que presentan ruido no afectan puntos de fase válidos. De esta manera, objetos complicados pueden ser analizados sin inconvenientes ya que el algoritmo utiliza una suma secuencial de diferencias de fase. | |
| dc.description.abstractenglish | The use of fringe projection method to obtain the 3D Reconstruction is a technique that has been broadly used in industrial and medical applications. Parallel fringes are projected on the surface either with a conventional system of projection using a diffraction grating or using interferometric fringes. This technique provides discontinuous phase maps and it is necessary to use algorithms of phase correction (unwrapping). Due to the spatial correction, errors can be propagated when erroneous discontinuity points caused by the presence of noise are identified. In this work a methodology is presented that allow to solve the absolute phase distribution of projected fringes patterns over objects surface with discontinuities and isolate zones. For this type of objects, the classic algorithm has wrongs in the relative phase. The temporal-unwrapping algorithm was use for this case. This algorithm doesn’t use neighboring pixels information. This is, noisy samples points don’t adversely influence good data points. Thus, complicated objects can be analyzed without problems by means of a sequential addition of phase differences | |
| dc.description.degreelevel | Maestría | |
| dc.description.degreename | Magíster en Física | |
| dc.format.mimetype | application/pdf | |
| dc.identifier.instname | Universidad Industrial de Santander | |
| dc.identifier.reponame | Universidad Industrial de Santander | |
| dc.identifier.repourl | https://noesis.uis.edu.co | |
| dc.identifier.uri | https://noesis.uis.edu.co/handle/20.500.14071/19438 | |
| dc.language.iso | spa | |
| dc.publisher | Universidad Industrial de Santander | |
| dc.publisher.faculty | Facultad de Ciencias | |
| dc.publisher.program | Maestría en Física | |
| dc.publisher.school | Escuela de Física | |
| dc.rights | http://creativecommons.org/licenses/by/4.0/ | |
| dc.rights.accessrights | info:eu-repo/semantics/openAccess | |
| dc.rights.creativecommons | Atribución-NoComercial-SinDerivadas 4.0 Internacional (CC BY-NC-ND 4.0) | |
| dc.rights.license | Attribution-NonCommercial 4.0 International (CC BY-NC 4.0) | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0 | |
| dc.subject | Reconstrucción 3D | |
| dc.subject | Calibración de cámaras | |
| dc.subject | Tratamiento digital de imágenes y triangulación láser. | |
| dc.subject.keyword | Fringes Projection | |
| dc.subject.keyword | 3D reconstruction | |
| dc.subject.keyword | Digital images treatment | |
| dc.title | Aproximación espacio-temporal para la media absoluta de la forma 3d de un objeto proyección de franjas | |
| dc.title.english | Spatial-temporal approach for the absolut measurement of the 3d shape of an object using fringes projection zayra pérez, jaime meneses abstract the use of fringe projection method to obtain the 3d reconstruction is a technique that has been broadly used in industrial and medical applications. parallel fringes are projected on the surface either with a conventional system of projection using a diffraction grating or using interferometric fringes. this technique provides discontinuous phase maps and it is necessary to use algorithms of phase correction (unwrapping). due to the spatial correction, errors can be propagated when erroneous discontinuity points caused by the presence of noise are identified. in this work a methodology is presented that allow to solve the absolute phase distribution of projected fringes patterns over objects surface with discontinuities and isolate zones. for this type of objects, the classic algorithm has wrongs in the relative phase. the temporal-unwrapping algorithm was use for this case. this algorithm doesn't use neighboring pixels information. this is, noisy samples points don't adversely influence good data points. thus, complicated objects can be analyzed without problems by means of a sequential addition of phase differences key words: fringes projection, 3d reconstruction, digital images treatment ƒtrabajo de investigación | |
| dc.type.coar | http://purl.org/coar/version/c_b1a7d7d4d402bcce | |
| dc.type.hasversion | http://purl.org/coar/resource_type/c_bdcc | |
| dc.type.local | Tesis/Trabajo de grado - Monografía - Maestria |