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A direct imaging algorithm for extended targets. (English) Zbl 1112.78014

Summary: We present a direct imaging algorithm for extended targets. The algorithm is based on a physical factorization of the response matrix of a transducer array. The multi-signal classification imaging function is used to visualize the results. A resolution and noise level-based thresholding strategy is developed for regularization. The algorithm is simple and efficient since no forward solver or iteration is needed. Multiple-frequency information improves both resolution and stability of the algorithm. Efficiency and robustness of the algorithm with respect to measurement noise and random medium fluctuations are demonstrated.

MSC:

78A46 Inverse problems (including inverse scattering) in optics and electromagnetic theory
65N21 Numerical methods for inverse problems for boundary value problems involving PDEs
94A08 Image processing (compression, reconstruction, etc.) in information and communication theory
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