SUPER-RESOLUTION IMAGING AND TARGET FEATURE EXTRACTION IN THE PRESENCE OF WAVEFRONT CURVATURE EFFECTS

Sun Changyin; Bao Zheng

Volume 23 Issue 8

Aug. 2001

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Article Navigation > Journal of Electronics & Information Technology > 2001 > 23(8): 729-735

Sun Changyin, Bao Zheng . SUPER-RESOLUTION IMAGING AND TARGET FEATURE EXTRACTION IN THE PRESENCE OF WAVEFRONT CURVATURE EFFECTS[J]. Journal of Electronics & Information Technology, 2001, 23(8): 729-735.

Citation:

Sun Changyin, Bao Zheng . SUPER-RESOLUTION IMAGING AND TARGET FEATURE EXTRACTION IN THE PRESENCE OF WAVEFRONT CURVATURE EFFECTS[J]. Journal of Electronics & Information Technology, 2001, 23(8): 729-735.

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SUPER-RESOLUTION IMAGING AND TARGET FEATURE EXTRACTION IN THE PRESENCE OF WAVEFRONT CURVATURE EFFECTS

Received Date: 1999-07-30
Rev Recd Date: 2000-04-03
Publish Date: 2001-08-19

Abstract

Abstract

Wavefront curvature defocus effects can occur when Polar Formatting Algorithin(PFA)is used to reconstruct the SAR image. The traditional approach to this situation is simply to limit the size of the scene reconstructed. From the aspect of super-resolution, it is demonstrated in this paper that by accurate estimation and post compensation of the space-variant Quadratic Phase Errors(QPEs), super-resolution image and target features can still be obtained in the presence of wavefront curvature effects. The estimate. of QPEs is roughly obtained by use of the Discrete Polynomial-Phase TranSfornl(DPT), then it is refined by a RELAX-based parametric estimation rnet.hod. Experimental results show the effectiveness of the, proposed method.

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References(1)

References

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