temperature measurement of nozzle guide vane

i apply thermal paint on gas turbine Nozzle guide. when thermal paint came in contact with temperature it undergoes permenent color change. we can measure the temperature of nozzle guide vane by analysing the color change. but i want to measure the temperature by image processing . whenever i move the pointer of mouse at any point the temperature should be shown . can you plz help me

i capture image of nozzle guide vane using 1+ camera