Patent ID: 8494616

Claim:
An apparatus to enhance the visibility of buried structure beneath a surface of an object, the apparatus comprising: at least one illumination source for illuminating the buried structure with infrared light in a first range at which subcutaneous blood vessels are visible and in a second range at which subcutaneous blood vessels are less visible; a first imaging device configured to receive infrared light in the first range reflected from the object and configured to produce a first image; a second imaging device configured to receive infrared light in the second range reflected from the object and configured to produce a second image; an image processor configured to compare the first image and the second image to generate a compared image; a video projector configured to project said compared image onto the surface of the object wherein the received infrared light in the first range and infrared light in the second range reflected from the object are coaxial with the projected compared image, and a filter, wherein said filter prevents said compared image from reaching said first imaging device or said second imaging device.