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Merging 3 grayscale bitmaps into RGB
Aug 24 2010 7:56 AM
Hi friends, I have separated Red, Green and Blue color from a bitmap image and stored it in grayscale (obviously). Now I want to know how can I merge it so that I can get the exact previous colour, when I am merging them by reading its color values it is giving me grayscale image :( . Please help me out with some working sample code. Thanking in anticipation.
I am using following code to merge:
public bool mergeToRGBandWriteBitmap(string sourceRFile, string sourceGFile, string sourceBFile, string targetFile)
{
bool isSuccessfullywritten = false;
try
{
Bitmap bitmapRed = (Bitmap)Image.FromFile(sourceRFile);
Bitmap bitmapGreen = (Bitmap)Image.FromFile(sourceGFile);
Bitmap bitmapBlue = (Bitmap)Image.FromFile(sourceBFile);
Bitmap afterMerge = mergeRGB(bitmapRed, bitmapGreen, bitmapBlue);
isSuccessfullywritten = true;
}
public Bitmap mergeRGB(Bitmap sourceR, Bitmap sourceG, Bitmap sourceB)
{
Bitmap bm = new Bitmap(sourceR.Width, sourceR.Height);
for (int y = 0; y < bm.Height; y++)
{
for (int x = 0; x < bm.Width; x++)
{
Color cBitmapR = sourceR.GetPixel(x, y);
Color cBitmapG = sourceG.GetPixel(x, y);
Color cBitmapB = sourceB.GetPixel(x, y);
int luma = (int)(cBitmapR.R * 0.3 + cBitmapR.G * 0.59 + cBitmapR.B * 0.11);
bm.SetPixel(x, y, Color.FromArgb((int)cBitmapR.R, (int)cBitmapR.G, (int)cBitmapR.B));
}
}
return bm;
}
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