Optical/SAR Scene Matching Based on Two-dimensional Multi-scale and Multi-direction Gabor Templates
Yunhui Jiang · Telecommunication Engineering · 2012
Generally optical reference image and SAR real-time image are used for feature extraction and scene matching in SAR(Synthetic Aperture Radar)imaging guidance.The heterogenous optical/SAR image matching method proposed in this paper extracts and matches image Gabor features using two-dimensional multi-scale and multi-direction Gabor templates.Firstly,directional Frost filtering preprocessing on SAR image is performed.Secondly,the Gaussian gradient image of the optical and SAR image are calculated respectively.Then,features are extracted from the two Gaussian gradient images using multi-scale and multi-direction two-dimensional Gabor filter group respectively.Finally,NCC(normalized cross-correlation) matching on the two characteristic matrixes is performed.The proposed method implements scene matching using optical image and real-time SAR image directly.The experiment result shows that the heterogenous image matching method is more robust and accurate than other traditional methods.