The Bulging Circle. There Are Several Illusions Happening. First The Circle Seems To Be Expanding While The Squares Seem To Be Moving Inward. Second The Bulging Circle Is An Illusion, All The Columns Are Perfectly Straight.
Photo Manipulations are always very interesting to watch because - and that's what is important - they give a realistic view of an unreal picture. Erik Johansson, a computer engineering student, from sweden has a sense for good ideas for manipulations.