Mlx90640 infrared thermal imager temperature sensor module development notes (6)

MLX90640 Infrared thermal imager temperature sensor module development notes （ 6、 ... and ） Infrared image pseudo color coding  

What is infrared imaging pseudo color coding  
The ultimate goal of infrared imaging is to use images to show temperature changes , And the outline and shape of objects with different heat can be distinguished by color . that , What color is used to represent what temperature ？ Are there any standards and specifications ？
At the beginning, this problem was also bottomless , Because I'm not a professional in infrared imaging , We can only look up information everywhere to understand the relationship between temperature and color , The following conclusions are basically obtained ：
（1） There is no absolute correspondence between temperature and color , No one requires that infrared imaging must use any color to represent a certain temperature , This correspondence is completely decided by the designer .
（2） Different application fields and industries have different purposes , Will carry out some temperature and color research , Then a suitable gradient is used to highlight some thermal elements of special concern .
（3） Color coding is mostly gradient . Here are several different color codes

in addition , Others have suggested that “ Conform to human physiology ” Make people look more “ comfortable ” Of HIS colour

The method of changing temperature to color
（1） First, assume the upper and lower limits of the temperature range and convert the actual temperature data into 0~255 Value between

（2） Use the converted value to substitute into the following pseudo color coding calculation function , Generate pseudo color

// Fake color 1
procedure GrayToPseColor(grayValue:Integer; var colorR,colorG,colorB:Ingeger);
Begin
colorR:=Abs(0-grayValue);
colorG:=Abs(127-grayValue);
colorB:=Abs(255-grayValue);
End;