In response to the reconnaissance needs on the battlefield,Synthetic Aperture Radar(SAR)image change detection technology,characterized by a wide imaging range and high imaging accuracy,can be applied to small target detection.In this paper,based on the large scale and small target size of SAR image,the difference method was improved.The medium-value filter was used for image noise reduction,and an adaptive sampling meth-od was proposed for fast image registration,and detection rate was improved by using power transform to increase target signal-to-noise ratio.Experiments verified the effectiveness of the improved difference method,which can shorten the detection time while ensuring the detection rate.
SAR imageobject detectionsmall targetsquick registration
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