public static float EqualPixelRatio(ImageMatrix lhs, ImageMatrix rhs)
{
int eq = 0;
for (int x = 0; x < lhs.Width; ++x)
{
for (int y = 0; y < lhs.Height; ++y)
{
if (!(rhs.Get(x, y) ^ lhs.Get(x, y)))
{
eq++;
}
}
}
return((float)eq / (lhs.Width * lhs.Height));
}