Figure 2.

(a) Example of selected region of interest (ROI) (red circle) on the nose tip of a particular subject overlaid onto the subject first frame of functional infrared imaging (fIRI) recording. The ROI moved together with the relative nose tip movement within each fIRI sample image employing a soft-tissue tracking algorithm. Average temperature within the ROI was extracted as a function of time for further analysis. (b) Grand average, and associated STD, of fIRI response to a single white noise stimulus.