Hello, 

I am using a Thermal Imaging Bricklet to create thermal images. My question is general, but I wanted to know on which formula the generated color palette is based and what's the logic behind it? 

For example in python the color palette creation looks as follows: 

for x in range(256):
        x /= 255.0
        palette.append(int(round(255*math.sqrt(x))))                  # RED
        palette.append(int(round(255*pow(x, 3))))                     # GREEN
        if math.sin(2 * math.pi * x) >= 0:
            palette.append(int(round(255*math.sin(2 * math.pi * x)))) # BLUE
        else:
            palette.append(0)

    return palette

Source: https://www.tinkerforge.com/en/doc/Software/Bricklets/ThermalImaging_Bricklet_Python.html 

Does any one know what's the principal behind this color palette?

Thank you!

 

Hi,

The palette is gnuplot's PM3D palette. It looks similar to the palettes used by FLIR.

https://stackoverflow.com/questions/28495390/thermal-imaging-palette

has further explainations.

Okay, thank you very much for your reply, I will look it up!