Inverts each of the image colors. The intensity of each channel
is reversed so that white becomes black, black becomes white and a
light gray will become a dark one.
Example
[C#]
Canvas canvas = new Canvas(Server.MapPath("rez/boat.gif"));
canvas.Invert();
canvas.SaveAs(Server.MapPath("invert.jpg"));
[Visual Basic]
Dim canvas As New Canvas(Server.MapPath("rez/boat.gif"))
canvas.Invert()
canvas.SaveAs(Server.MapPath("invert.jpg"))