/// <summary>
/// Calculates the difference between one given frame and another.
/// </summary>
/// <param name="first">The first frame to compare.</param>
/// <param name="second">The second frame to compare.</param>
/// <returns>The similarity between the two frames in percentage.</returns>
public static double CalculateDifference(FrameInfo first, FrameInfo second)
{
#region Get Image Info
var imageAux1 = first.Path.From();
var imageAux2 = second.Path.From();
var image1 = new PixelUtilOld(imageAux1); //First image
var image2 = new PixelUtilOld(imageAux2); //Last image
image1.LockBits();
image2.LockBits();
var height = imageAux1.Height;
var width = imageAux1.Width;
var equalCount = 0;
#endregion
//Only use Parallel if the image is big enough.
if (width * height > 150000)
{
#region Parallel Loop
//x - width - sides
Parallel.For(0, width, x =>
{
//y - height - up/down
for (var y = 0; y < height; y++)
{
if (image1.GetPixel(x, y) == image2.GetPixel(x, y))
{
Interlocked.Increment(ref equalCount);
}
//equalCount = equalCount + (image1.GetPixel(x, y) == image2.GetPixel(x, y) ? 1 : 0);
}
});
#endregion
}
else
{
#region Sequential Loop
//x - width - sides
for (var x = 0; x < width; x++)
{
//y - height - up/down
for (var y = 0; y < height; y++)
{
equalCount = equalCount + (image1.GetPixel(x, y) == image2.GetPixel(x, y) ? 1 : 0);
}
}
#endregion
}
image1.UnlockBits();
image2.UnlockBits();
GC.Collect(1);
return(Other.CrossMultiplication(width * height, equalCount, null));
}