Double stage 1 Image segmentation 1 Infrared point target Infrared remote sensing 1 Low signal-to-noise ratio 1 Monte Carlo methods 1 Particle filter 1 Point target detection 1 Point target tracking 1 Point targets 1 Potential targets 1 Remote sensing 1 Signal to noise ratio 1 Target detection and tracking 1 Target tracking 1 infrared point target 1 infrared remote sensing 1 particle filter 1 target detection and tracking 1