Caption: 
(a) Example of an image captured by the infrared camera after the sample temperature has reached a stable state with the approximate position and size of the measurement spot of $143\times 72$ pixels, corresponding to approx. $1.9\times 0.9$\,mm. (b) Temperature evolution inside the measurement spot marked by the rectangle in (a). The shaded area gives the 95\% range of temperatures at each captured image measured at 7 fps.

Notes:
Rectangle measurement spot:
Lower-left corner: (5.4, 171, 100)
Upper-right corner: (90.6, 128.4, 100)
