1. A surveillance method comprising the steps of: providing an imaging means mounted to a moving platform; georeferencing the imaging means; acquiring images from the imaging means, each image comprising a plurality of pixels; producing a background model of the pixels; producing a histogram of a characteristic property for analysis of each of the pixels; analyzing the histogram for each pixel, thereby facilitating assignment of each pixel with one of a background state and a foreground state; and classifying each pixel as one of background and foreground based on the assignment of the pixel with the one of the background state and the foreground state.