Relevance of the Holderian regularity-based interpolation for range-Doppler ISAR image post-processing
In ISAR processing, post-processing of the range Doppler image is useful to help the practitioner for ship recognition. Among the image post-processing tools, interpolation methods can be of interest especially when zooming. In this paper, we study the relevance of the Holderian regularity-based interpolation. In that case, interpolating consists in adding a new scale in the wavelet transform and the new wavelet coefficients can be estimated from others. In the original method, initially proposed by two of the authors, the image is first interpolated along the rows and then along the columns. Concerning the diagonal pixels, they are estimated as the mean of the adjacent original and interpolated pixels. Here, we propose a variant where the diagonal pixels are estimated by taking into account the local orientation of the image. It has the advantage of conserving local regularity on all interpolated pixels of the image. A comparative study on synthetic data and real range-Doppler images is then carried out with alternative interpolation techniques such as the linear interpolation, the bicubic one, the nearest neighbour interpolation, etc. The simulation results confirm the effectiveness of the approach.
Inverse synthetic aperture radar range-Doppler image interpolation Holder exponent local regularity.
Vincent Corretja Pierrick Legrand Eric Grivel Jacques Levy-Vehel
THALES SYSTEMES AEROPORTES S.A. 16, avenue Gustave Eiffel, 33600 PESSAC, FRANCE THALES SYSTEMES AERO THALES SYSTEMES AEROPORTES S.A. Université Bordeaux Segalen - ALEA Team - INRIA Bordeaux Sud-Ouest – THALES SYSTEMES AEROPORTES S.A. Université Bordeaux 1 – IPB ENSEIRB-MATMECA – IMS – UMR CNRS 5218 THALES SYSTEMES AEROPORTES S.A. INRIA - B.P. 105, 78153 Le Chesnay cedex, France
国际会议
2011 IEEE CIE International Conference on Radar(2011年IEEE国际雷达会议RADAR 2011)
成都
英文
681-684
2011-10-24（万方平台首次上网日期，不代表论文的发表时间）