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Quiroga Mellado, Juan Antonio ; Vargas, Javier ; Estrada, Julio César ; Carazo García, José María ; Sánchez Sorzano, Carlos Óscar | Elsevier Sci. Ltd. | 2013-07Noise is a key problem in fringe pattern processing, especially in single frame demodulation of interferograms. In this work, we propose to filter the pattern noise using a straightforward, fast and easy to implement denoising method, which is b[...]texto impreso
Quiroga Mellado, Juan Antonio ; Vargas, Javier ; Estrada, Julio C. ; Sánchez Sorzano, Carlos Óscar ; Servín Guirado, Manuel | The Optical Society Of America | 2012-08-20Fringe patterns with a multiplicative phase shift among them appear in experimental techniques as photoelasticity and RGB shadow moiré, among others. These patterns cannot be processed using standard phase-shifting demodulation techniques. In th[...]texto impreso
Quiroga Mellado, Juan Antonio ; Vargas, Javier ; Sánchez Sorzano, Carlos Óscar ; Estrada, Julio C. ; Carazo García, José María | The Optical Society Of America | 2012-02-01This Letter presents an efficient, fast, and straightforward two-step demodulating method based on a Gram-Schmidt (GS) orthonormalization approach. The phase-shift value has not to be known and can take any value inside the range (0, 2 ?) exclud[...]texto impreso
Quiroga Mellado, Juan Antonio ; Vargas, Javier ; Sánchez Sorzano, Carlos Óscar ; Estrada, Julio César ; Carazo García, José María | The Optical Society Of America | 2011-09-01A two-step phase-shifting method, that can demodulate open-and closed-fringed patterns without local sign ambiguity is presented. The proposed method only requires a constant phase-shift between the two interferograms. This phase-shift does not [...]
