COMPARISON AMONG DIFFERENT QUALITY MAPS USED FOR PHASE UNWRAPPING
Xiao Feng 1,2) ; Wu Jicang 2,3) ; Liu Chaogong 2) ; and Zhang Lei 4)
1)Hangzhou Bureau of Land and Resources, Hangzhou 3100122)Dept. of Surveying and Geoinformatics, Tongji University, Shanghai 2000923)Key Lab. of Geodynamics, IGG, Wuhan 4300774)Dept. of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong
Abstract：Qualityguided phase unwrapping algorithm is one of the most effective methods. In this category of algorithms, the pixels are unwrapped from the high quality points to the low quality ones. The success rate of phase unwrapping strongly depends on the quality map. We employ three quality maps (i.e., pseudocorrelation, phase derivative variance map and maximum phase gradient) as the guided maps and make some comparative analyses among them aiming to indicate which map performs best in general case.
