Recovering high dynamic range radiance maps from photographs
Proceedings of the 24th annual conference on Computer graphics and interactive techniques
A Flexible New Technique for Camera Calibration
IEEE Transactions on Pattern Analysis and Machine Intelligence
Acquisition of time-varying participating media
ACM SIGGRAPH 2005 Papers
Density estimation for dynamic volumes
Computers and Graphics
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The near zone of heat diffusing machines in an equipment room is very critical for the normal functioning of the machines. Current knowledge about the near zone of heat diffusing machine is insufficient, causing an increasing need for better measuring methods and representation of the air temperature distribution. We proposed a vision-based measuring technique for visualization of air temperatures and air flow patterns over a large area. As a medium, smoke is generated in the near zone of heat diffusing machine to make the air flow visible. A specialized capturing technique is used to record density distribution of the time-varying smoke. We place a few temperature sensors sparsely over the volume and combine the outputs of the temperature sensors and density information of the smoke to measure the temperature distribute in the space. Experiments validate the effectiveness of the proposed method.