FAST PHASE-UNWRAPPING ALGORITHM-BASED ON A GRAY-SCALE MASK AND FLOOD FILL

Phase-unwrapping algorithms, an active and interesting subject in rece nt years, are important in a great number of measurement applications. Active research is being undertaken to develop reliable and high-spee d procedures. The current process uses a gray-scale mask and the flood -fill concept from image processing for phase unwrapping. The algorith m unwraps phase from an area with higher reliability to one with lower reliability. In addition to robustness, the speed of the algorithm pr oposed is much faster than conventional routines. The experimental res ults of different algorithms are compared by analysis of a tooth plast er and a photoelastic specimen. (C) 1998 Optical Society of America.