Stereo techniques for 3d mapping of object surface temperatures

Abstract

In this paper, we present two stereo methods to obtain 3D mappings of objectsurface temperatures. The first method uses a pair of trichromatic cameras to recover the 3D geometry and then maps the temperature data from a thermal camera onto the recovered surface. The second method recovers the 3D surface temperature map using a pair of thermal cameras by exploiting isotherms and epipolar geometry. The former setup is cheaper while the latter has the novel advantage of estimating object depth in a dark environment. Both methods make use of a simple technique to calibrate thermal cameras, which makes the calibration approach akin to that of trichromatic systems. Finally, we conduct a comparative study of the two proposed approaches focusing on the accuracy of the results, applicability and robustness. Show more