Improved morphological filtering method for interferograms

Abstract

This study proposes an improved interferogram filtering method with mathematical morphology. The algorithm firstly converts the interferogram in cosine and sine parts to preserve the continuity of phases, then adopts the improved adaptive line structure elements to run reconstruction process on two parts based on grey scale morphological opening and closing operations. In addition combine the two filtered parts to get the wrapped phases. Simulated and real-data experiments show that the proposed algorithm is more robust in filtering compared with other algorithms referred in this study.

Keywords

• filtering theory
• image reconstruction
• mathematical morphology
• cosine
• sine parts
• improved adaptive line structure elements
• reconstruction process
• grey scale morphological opening
• closing operations
• filtered parts
• wrapped phases
• improved morphological filtering method
• improved interferogram filtering method
• mathematical morphology