On the Temperature Assignment Problem and the Use of Confidence Textures
in the Creation of 3D Thermograms
A. Ordonez Müller, und A. Kroll. 9th International Conference on Sensing Technology (ICST 2015), Seite 235-240. Auckland, New Zealand, (Dezember 2015)
Zusammenfassung
In infrared thermography, the temperature measured by a thermal imaging
device varies with the position and orientation of the camera with
respect to an object's surface. 3D thermography has hence the potential
to depict the surface temperature of objects with higher fidelity
than conventional 2D thermography. So far the problem of assigning
temperature values that correspond to the same surface but were obtained
from different perspectives has been addressed by simply overwriting
previous values with new values or by averaging the measured values
according to a weighted averaging scheme. A new approach to map temperature
values onto a 3D model is proposed that results in a more faithful
representation of an object's real surface temperature in form of
a 3D thermogram. Temperature values are assigned in real time to
the 3D model taking into consideration the observation conditions
under which they were measured. These conditions are also made available
to the user in form of textured 3D models, where the texture color
depicts the level of confidence associated to the thermal measurements.
These textures provide useful additional information about the 3D
thermogram. The new approach is especially helpful in the real-time
generation of 3D thermograms as the user gets live feedback on the
quality of the thermal model being generated.