Modified motion-based detection algorithm for dim targets in IR image sequences

摘要

An integrated algorithm for the detection of dim point/extended size, slow/fast-moving targets has been presented in this paper. In the proposed algorithm, essentially an innovation over an existing algorithm reported by Nengli Dong et al [7], morphological operations are carried out on the incoming IR data to improve signal to noise ratio (SNR). Methods of entropy thresholding and conjunction functions are integrated together. Conjunction function based algorithm has been significantly modified to take care of fast moving targets, a limitation of the method proposed by Nengli Dong et al. Our proposed algorithm is able to detect point as well extended size targets with low contrast and having frame to frame movements varying from sub-pixel to tens of pixels.