A filtering algorithm is proposed for processing images generated by TV holography that contain phase jumps and a high noise level. This algorithm first performs phase unwrapping without removing the noise. After that, it removes the noise by use of a conventional low-pass filter. The new approach allows for using low-pass filters with narrow passbands, leading to a better signal-to-noise ratio in the desired signal. Simulation results are presented and discussed. The new algorithm has been applied successfully under real conditions in a holographic station.
© 1998 Optical Society of America
Original Manuscript: June 16, 1997
Revised Manuscript: November 12, 1997
Published: April 10, 1998
Rui Seara, Armando A. Gonçalves, and Policarpo B. Uliana, "Filtering algorithm for noise reduction in phase-map images with 2π phase jumps," Appl. Opt. 37, 2046-2050 (1998)