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Quiroga Mellado, Juan Antonio ; Estrada, Julio C. ; Servín Guirado, Manuel ; Navarro, Miguel A. | The Optical Society Of America | 2012-01-30Here, we present a fast algorithm for two-dimensional (2D) phase unwrapping which behaves as a recursive linear filter. This linear behavior allows us to easily find its frequency response and stability conditions. Previously, we published a rob[...]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 ; Estrada, Julio C. ; Vargas, Javier ; Flores Moreno, Mauricio J. | The Optical Society Of America | 2012-11-12In this work, we show a windowed phase-unwrapping technique that uses a first-order dynamic system and scans the phase following its iso-phase contours. In previous works, we have shown that low-pass first-order dynamic systems are very robust a[...]
