private static Bitmap GrayDiff(Bitmap b1, Bitmap b2)
{
var res = new Bitmap(b1.Width, b1.Height);
using (var fb1 = new FastBitmap(b1))
using (var fb2 = new FastBitmap(b2))
using (var fb3 = new FastBitmap(res))
{
for (var i = 0; i < fb1.Count; i++)
{
var diff = (byte)Math.Abs(fb1.GetI(i).r - fb2.GetI(i).r);
fb3.SetI(i, (diff, diff, diff));
}
}
var(min, max) = ((byte)255, (byte)0);
FastBitmap.ForEach(res, cl =>
{
if (cl.r > max)
{
max = cl.r;
}
if (cl.r < min)
{
min = cl.r;
}
});
return(FastBitmap.Select(res, cl =>
{
var t = (byte)((cl.r - min) / (double)(max - min) * 255);
return (t, t, t);
}));;
}
