| Journal: | Journal of the Brazilian Society of Mechanical Sciences |
| Database: | PERIÓDICA |
| System number: | 000312052 |
| ISSN: | 0100-7386 |
| Authors: | Smith Neto, Perrin1 Coelho, Guilherme Cremasco |
| Institutions: | 1Pontificia Universidade Catolica de Minas Gerais, Departamento Engenharia Mecatronica, Belo Horizonte, Minas Gerais. Brasil |
| Year: | 2000 |
| Volumen: | 22 |
| Number: | 3 |
| Pages: | 399-409 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Experimental |
| English abstract | The Shadow Moiré fringe patterns are level lines of equal depth generated by interference between a master grid and its shadow projected on the surface. In simplistic approach, the minimum error is about the order of the master grid pitch, that is, always larger than 0,1 mm, resulting in an experimental technique of low precision. The use of a phase shift increases the accuracy of the Shadow Moiré technique. The current work uses the phase shifting method to determine the surfaces three-dimensional shape using isothamic fringe patterns and digital image processing. The current study presents the method and applies it to images obtained by simulation for error evaluation, as well as to a buckled plate, obtaining excellent results. The method hands itself particularly useful to decrease the errors in the interpretation of the Moiré fringes that can adversely affect the calculations of displacements in pieces containing many concave and convex regions in relatively small areas |
| Disciplines: | Ciencias de la computación, Ciencia y tecnología |
| Keyword: | Tecnología, Procesamiento digital de imágenes, Simulación, Cambio de fase, Método de Shadow Moiré, Reconstrucción, Modelos tridimensionales |
| Keyword: | Computer science, Science and technology, Technology, Digital image processing, Simulation, Phase shifting, Shadow Moire method, Reconstruction, Three-dimensional models |
| Full text: | Texto completo (Ver HTML) |
