/// <summary>
/// Uses an RGB histogram to equalize the image
/// </summary>
/// <param name="OriginalImage">Image to manipulate</param>
/// <returns>The resulting SwiftBitmap image</returns>
public static SwiftBitmap Equalize(this SwiftBitmap OriginalImage)
{
Contract.Requires<ArgumentNullException>(OriginalImage != null, "OriginalImage");
using (SwiftBitmap NewSwiftBitmap = new SwiftBitmap(OriginalImage.Width, OriginalImage.Height))
{
var TempHistogram = new RGBHistogram(OriginalImage);
TempHistogram.Equalize();
NewSwiftBitmap.Lock();
OriginalImage.Lock();
Parallel.For(0, OriginalImage.Width, x =>
{
for (int y = 0; y < OriginalImage.Height; ++y)
{
Color Current = OriginalImage.GetPixel(x, y);
var NewR = (int)TempHistogram.R[Current.R];
var NewG = (int)TempHistogram.G[Current.G];
var NewB = (int)TempHistogram.B[Current.B];
NewR = NewR.Clamp(255, 0);
NewG = NewG.Clamp(255, 0);
NewB = NewB.Clamp(255, 0);
NewSwiftBitmap.SetPixel(x, y, Color.FromArgb(NewR, NewG, NewB));
}
});
NewSwiftBitmap.Unlock();
return OriginalImage.Unlock().Copy(NewSwiftBitmap);
}
}
/// <summary>
/// Uses an RGB histogram to equalize the image
/// </summary>
/// <param name="Image">Image to manipulate</param>
public static Bitmap Equalize(Bitmap Image)
{
System.Drawing.Bitmap TempBitmap = Image;
System.Drawing.Bitmap NewBitmap = new System.Drawing.Bitmap(TempBitmap.Width, TempBitmap.Height);
System.Drawing.Graphics NewGraphics = System.Drawing.Graphics.FromImage(NewBitmap);
NewGraphics.DrawImage(TempBitmap, new System.Drawing.Rectangle(0, 0, TempBitmap.Width, TempBitmap.Height), new System.Drawing.Rectangle(0, 0, TempBitmap.Width, TempBitmap.Height), System.Drawing.GraphicsUnit.Pixel);
NewGraphics.Dispose();
RGBHistogram TempHistogram = new RGBHistogram(NewBitmap);
TempHistogram.Equalize();
for (int x = 0; x < NewBitmap.Width; ++x)
{
for (int y = 0; y < NewBitmap.Height; ++y)
{
Color Current=NewBitmap.GetPixel(x,y);
int NewR = (int)TempHistogram.R[Current.R];
int NewG = (int)TempHistogram.G[Current.G];
int NewB = (int)TempHistogram.B[Current.B];
if (NewR >= 256)
NewR = 255;
if (NewG >= 256)
NewG = 255;
if (NewB >= 256)
NewB = 255;
NewBitmap.SetPixel(x, y, Color.FromArgb(NewR, NewG, NewB));
}
}
return NewBitmap;
}
