Electronics Optics & Control, Volume. 24, Issue 1, 41(2017)
A Feature Point Extraction Approach of SAR Image Based on Facet Model
For the feature point matching of SAR images used in navigation system, a feature point extraction approach is proposed based on Facet model.Firstly, the image intensity surface is well fitted through the Facet model.Then the second-order directional derivative of the center point of the fitting surface is calculated out, and the point whose second-order directional derivative is less than zero is taken as the potential feature point.Through normalization of absolute values for maximum values of the potential feature points and local non-maxima suppression, the feature points are obtained.Experimental results show that the proposed algorithm can successfully detect the feature point, and the real-time performance of the algorithm is better than that of the traditional SIFT algorithm.
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HUANG Peng-jie, WANG Hong-li, ZHAO Ai-gang, LU Jing-hui, JIANG Wei. A Feature Point Extraction Approach of SAR Image Based on Facet Model[J]. Electronics Optics & Control, 2017, 24(1): 41
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Received: Jan. 12, 2016
Accepted: --
Published Online: Feb. 9, 2017
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