Detection of potential threats that are camouflaged or concealed is important not only for military acquisition problems but, also for crowd surveillance as well as tactical use such as on border patrols. Imaging and display technologies that take advantage of photo-simulation and sensor fusion are discussed in this paper. A comparison of the detection rates of visible, infrared (IR) and sensor-fused imagery of scenes that contain a Rocket Propelled Grenade (RPG) were made. Image fusion was achieved using a Gaussian Laplacian pyramidal approach with wavelets for edge enhancement. Three types of images were also compared in terms of better detection of concealed weapons.