The one at Disneyland appears to be using actual footage of people in line (there is a very obvious camera at the beginning of the line. The output image itself did not, to my untrained eye, look like any sort of actual thermal imaging, it looked liked like the live video sent through a pretty visual filter.
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'He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me.'
-TJ
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