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| L∞+L1-norm Method for Multi-baseline Phase Unwrapping |
| Liu Hui-tao Xing Meng-dao Bao Zheng |
| (National Laboratory of Radar Signal Processing, Xidian University, Xi’an 710071, China) |
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Abstract Multi-baseline phase unwrapping problem can be solved according to find the optimal solution of the L1-norm optimization. However, there are two problems: one is the huge memory required and the other is the difficulty in processing interferograms with severe noise. In order to decrease the memory requirement of the L1-norm method, with a cost function of L∞-norm is employed to approximate the L1-norm. Consequently, the objective function of the improved multi-baseline phase unwrapping is the form of L∞-norm+L1-norm, and the size of the new optimization variable is decreased by 57%. The performance of the proposed algorithm is validated via a real dataset with severe noise present, and the experiment demonstrates that the proposed algorithm not only presents a well phase unwrapping result of interferograms with good quality, but also performs a filtering against noise region.
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Received: 17 July 2014
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Corresponding Authors:
Xing Meng-dao
E-mail: xmd@xidian.edu.cn
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2015, Vol. 37 
