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algorithm - Display temperature as a color with C#?

Someone knows an algorithm that gets temperatue in Kelvin/Celsius and returns RGB?

Like in thermal cameras.

I found some links :

http://www.brucelindbloom.com/index.html?Eqn_XYZ_to_T.html

http://www.fourmilab.ch/documents/specrend/specrend.c

enter image description here

But i cant figure what XYZ color is ?

enter image description here

I only have temperature in Celsius..

i can convert it to any temperature Temperature Conversion Formulas

UPDATE: Blackbody Color Datafile I have found this.. but those Kelvin degrees are impossible.. i mean red suppose to be hot.. so why 8000k is blue and 1000k is red...

See Question&Answers more detail:os

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1 Answer

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The best option is to use an image with GetPixel:

Temperature Gradient

private void UpdateTemp()
{
    Bitmap temps = (Bitmap)Properties.Resources.temp;
    if (curTemp >= 0)
    {
        int i = curTemp;
        if (i < 0)
            i = 0;
        if (i > temps.Width-1)
            i = temps.Width-1;
        this.BackColor = temps.GetPixel(i, 10);
    }
}

Or building an array. Source

    private static Color[] colors = 
    {
        Color.FromArgb(155, 188, 255), //    40000
        Color.FromArgb(155, 188, 255), //    39500
        Color.FromArgb(155, 188, 255), //    39000
        Color.FromArgb(155, 188, 255), //    38500
        Color.FromArgb(156, 188, 255), //    38000
        Color.FromArgb(156, 188, 255), //    37500
        Color.FromArgb(156, 189, 255), //    37000
        Color.FromArgb(156, 189, 255), //    36500
        Color.FromArgb(156, 189, 255), //    36000
        Color.FromArgb(157, 189, 255), //    35500
        Color.FromArgb(157, 189, 255), //    35000
        Color.FromArgb(157, 189, 255), //    34500
        Color.FromArgb(157, 189, 255), //    34000
        Color.FromArgb(157, 189, 255), //    33500
        Color.FromArgb(158, 190, 255), //    33000
        Color.FromArgb(158, 190, 255), //    32500
        Color.FromArgb(158, 190, 255), //    32000
        Color.FromArgb(158, 190, 255), //    31500
        Color.FromArgb(159, 190, 255), //    31000
        Color.FromArgb(159, 190, 255), //    30500
        Color.FromArgb(159, 191, 255), //    30000
        Color.FromArgb(159, 191, 255), //    29500
        Color.FromArgb(160, 191, 255), //    29000
        Color.FromArgb(160, 191, 255), //    28500
        Color.FromArgb(160, 191, 255), //    28000
        Color.FromArgb(161, 192, 255), //    27500
        Color.FromArgb(161, 192, 255), //    27000
        Color.FromArgb(161, 192, 255), //    26500
        Color.FromArgb(162, 192, 255), //    26000
        Color.FromArgb(162, 193, 255), //    25500
        Color.FromArgb(163, 193, 255), //    25000
        Color.FromArgb(163, 193, 255), //    24500
        Color.FromArgb(163, 194, 255), //    24000
        Color.FromArgb(164, 194, 255), //    23500
        Color.FromArgb(164, 194, 255), //    23000
        Color.FromArgb(165, 195, 255), //    22500
        Color.FromArgb(166, 195, 255), //    22000
        Color.FromArgb(166, 195, 255), //    21500
        Color.FromArgb(167, 196, 255), //    21000
        Color.FromArgb(168, 196, 255), //    20500
        Color.FromArgb(168, 197, 255), //    20000
        Color.FromArgb(169, 197, 255), //    19500
        Color.FromArgb(170, 198, 255), //    19000
        Color.FromArgb(171, 198, 255), //    18500
        Color.FromArgb(172, 199, 255), //    18000
        Color.FromArgb(173, 200, 255), //    17500
        Color.FromArgb(174, 200, 255), //    17000
        Color.FromArgb(175, 201, 255), //    16500
        Color.FromArgb(176, 202, 255), //    16000
        Color.FromArgb(177, 203, 255), //    15500
        Color.FromArgb(179, 204, 255), //    15000
        Color.FromArgb(180, 205, 255), //    14500
        Color.FromArgb(182, 206, 255), //    14000
        Color.FromArgb(184, 207, 255), //    13500
        Color.FromArgb(186, 208, 255), //    13000
        Color.FromArgb(188, 210, 255), //    12500
        Color.FromArgb(191, 211, 255), //    12000
        Color.FromArgb(193, 213, 255), //    11500
        Color.FromArgb(196, 215, 255), //    11000
        Color.FromArgb(200, 217, 255), //    10500  
        Color.FromArgb(204, 219, 255), //    10000
        Color.FromArgb(208, 222, 255), //    9500
        Color.FromArgb(214, 225, 255), //    9000
        Color.FromArgb(220, 229, 255), //    8500
        Color.FromArgb(227, 233, 255), //    8000
        Color.FromArgb(235, 238, 255), //    7500
        Color.FromArgb(245, 243, 255), //    7000
        Color.FromArgb(255, 249, 253), //    6500
        Color.FromArgb(255, 243, 239), //    6000
        Color.FromArgb(255, 236, 224), //    5500
        Color.FromArgb(255, 228, 206), //    5000
        Color.FromArgb(255, 219, 186), //    4500
        Color.FromArgb(255, 209, 163), //    4000
        Color.FromArgb(255, 196, 137), //    3500
        Color.FromArgb(255, 180, 107), //    3000
        Color.FromArgb(255, 161,  72), //    2500
        Color.FromArgb(255, 137,  18), //    2000
        Color.FromArgb(255, 109,   0), //    1500 
        Color.FromArgb(255,  51,   0), //    1000
    };

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