if the circle of confusion is from a point light, then we would basically have the perfect point on the Gauss ray diagram, instead of possible stretch due to magnification like the one shown four slides ago with the red circle. That's probably why we will see the blur kernel itself if the blur is caused by a point light.
if the circle of confusion is from a point light, then we would basically have the perfect point on the Gauss ray diagram, instead of possible stretch due to magnification like the one shown four slides ago with the red circle. That's probably why we will see the blur kernel itself if the blur is caused by a point light.