[C#/WINFORM] 비트맵 명도 조정하기

using System;
using System.Drawing;

#region 비트맵 명도 조정하기 - AdjustBitmapBrightness(sourceImage, brightness)

/// <summary>
/// 비트맵 명도 조정하기
/// </summary>
/// <param name="sourceImage">소스 이미지</param>
/// <param name="brightness">명도</param>
/// <returns>명도 조정 비트맵</returns>
public Bitmap AdjustBitmapBrightness(Image sourceImage, int brightness)
{
    Bitmap targetBitmap = new Bitmap(sourceImage);
    Color  color;
    int    r;
    int    g;
    int    b;
        
    for(int y = 0; y < targetBitmap.Height; y++)
    {
        for(int x = 0; x < targetBitmap.Width; x++)
        {
            color = targetBitmap.GetPixel(x, y);

            r = Math.Max(0, Math.Min(255, color.R + brightness));
            g = Math.Max(0, Math.Min(255, color.G + brightness));
            b = Math.Max(0, Math.Min(255, color.B + brightness));

            color = Color.FromArgb(r, g, b);

            targetBitmap.SetPixel(x, y, color);
        }
    }

    return targetBitmap;
}

#endregion