Point target enhancement based on temporal-spatial over-sampling and image filtering

A method for point target enhancement based on temporal-spatial over-sampling and adaptive filtering is proposed in this paper. First of all, an over-sampling scanning imaging system is designed for target imaging enhancement. Two separate detector arrays are offset to each other by a half detector in the cross-scan direction and the sampling frequency in the in-scan direction is increased. A sub-pixel image of point target is obtained by interlace-combined two frame image from the two detector arrays. Secondly, image filtering is used to enhance the target embedded in clutter background. Clutter background suppression, local enhancement and contrast extension are performed. Experimental results show that the method presented in this paper can enhance the point target effectively in scanning detection system.