In this thesis, we present an approximation of heat transfer system consisting of radiation, conduction, convection and the producing visually similar thermal image. The process includes two main steps.
At first, we voxelize each object in the scene. Since the temperatures between various parts of object may not be the same, we apply finite element method to visualize temperature of object in detail. For this purpose, we separate surface of object model in orthogonal view and store geometric information to a series of textures.
Second, we approximate heat transfer. By this step, an object model can be represented as numerous voxels. Voxelized objects exchange heat with other voxels at contact under large temperature differences. We add wind blowing to make quickly temperature equilibrium of objects and environment. The voxelization textures store heat energy and update in parallel through GPU calculation. Finally, we render objects with stored heat in textures and reflected heat of radiation on surface in screen.
We provide an efficient framework implementation that fit into a general GPU-based visualization system. All of these methods are able to be accelerated by GPU-based rendering which synthesizes realistic thermal images of a virtual environment in real-time.
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