1. An underlying wall structure finding system comprising: a first sensor configured to generate a first set of data indicative of the location of a stud or other underlying structure beneath the surface of a wall; an infrared (IR) imaging device configured to generate IR image data indicative of the heat pattern of a target scene; wherein the IR image data is configured to be displayed on a display; and a processor, wherein the processor is configured to: receive the IR image data and the first set of data; and generate a probability map for the display based on the IR image data and the first set of data designating areas beneath the surface of the wall in which underlying studs or other structures are most likely present.