1. A computer implemented method for identifying a concealed object of interest, comprising an act of causing a computer having a processor and a memory module encoded with instruction means that are executable by the processor to execute the instruction means and cause the processor to perform acts of: receiving an image in grayscale; processing the image to identify feature rich regions which are identified as a binary mask describing edge pixels and non-edge pixels; randomly sampling a set of edge pixels; and determining if an object of interest is present in the set of edge pixels.