// -- define Flir calibration values ---------------
// exiftool -plan* FLIROne-2015-11-30-17-26-48+0100.jpg 

#define  PlanckR1  16528.178
#define  PlanckB  1427.5
#define  PlanckF  1.0
#define  PlanckO  -1307.0
#define  PlanckR2  0.012258549

#define  TempReflected 20.0     // Reflected Apparent Temperature [°C]
#define  Emissivity 0.95  // Emissivity of object