using System;

public class Program

{

    private static ushort[] CalculateLUT(double brightness = 1.0, double contrast = 0.5, double gamma = 2.8)

{

    const int dataPoints = 256;

​

    // Limit gamma in range [0.4-2.8]

    gamma = Math.Min(Math.Max(gamma, 0.4), 2.8);

​

    // Normalize contrast in range [-1,1]

    contrast = (Math.Min(Math.Max(contrast, 0), 1) - 0.5) * 2;

​

    // Normalize brightness in range [-1,1]

    brightness = (Math.Min(Math.Max(brightness, 0), 1) - 0.5) * 2;

​

    // Calculate curve offset resulted from contrast

    var offset = contrast > 0 ? contrast * -25.4 : contrast * -32;

​

    // Calculate the total range of curve

    var range = (dataPoints - 1) + offset * 2;

​

    // Add brightness to the curve offset

    offset += brightness * (range / 5);

​

    // Fill the gamma curve

    var result = new ushort[dataPoints];

    for (var i = 0; i < result.Length; i++)

    {

        var factor = (i + offset) / range;

​

        factor = Math.Pow(factor, 1 / gamma);

​

        factor = Math.Min(Math.Max(factor, 0), 1);

​

        result[i] = (ushort)Math.Round(factor * ushort.MaxValue);

    }

​

    return result;

}

    public static void Main()

    {

        ushort [] result = CalculateLUT();

        foreach(ushort i in result){

            Console.Write(i + " ");

        }

    }

}