Percentage difference between images: Difference between revisions

=={{header|C#}}==

<lang Csharp>using System;

using System.Drawing;

class Program

{

static void Main()

{

Bitmap img1 = new Bitmap("Lenna50.jpg");

Bitmap img2 = new Bitmap("Lenna100.jpg");

if (img1.Size != img2.Size)

{

Console.Error.WriteLine("Images are of different sizes");

return;

}

float diff = 0;

for (int y = 0; y < img1.Height; y++)

{

for (int x = 0; x < img1.Width; x++)

{

diff += (float)Math.Abs(img1.GetPixel(x, y).R - img2.GetPixel(x, y).R) / 255;

diff += (float)Math.Abs(img1.GetPixel(x, y).G - img2.GetPixel(x, y).G) / 255;

diff += (float)Math.Abs(img1.GetPixel(x, y).B - img2.GetPixel(x, y).B) / 255;

}

}

Console.WriteLine("diff: {0} %", 100 * diff / (img1.Width * img1.Height * 3));

}

}</lang>