Thermal Imaging Bricklet - Color Palette

[mylo0001]

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!

 

[rtrbt]

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.

[mylo0001]

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