Archive for the 'Optical illusion' category

Try and find some really straight lines!

Illusion created by Akiyoshi Kitaoka.

Duck or rabbit?

Boats, clouds, arches?

The central bar is actually fully homogeneous despite the feeling we have that its a gradient (due to the inverse gradient of the background; Hide it and you will see!).

One of many optical illusion-based paintings from Bev Doolittle.

It is only a number of irregular spots, but our brain tries its best to build an image and finds a correspondence with a Dalmatian dog.

Look at the central dots. Which one is the biggest?

If you follow the movement, all dots are pink. If you concentrate on the central cross, there is a rotating green dot.

Wrong perspective, optical illusion, mistake of the drawing hand?

Along similar lines, more brillant, here is a cool graphical work from Daniel Martinez Lara and Kike Oliva.

And, finally, the engraving from Escher that inspired one optical illusion and draws from the other’s principles.

It was not trivial, but artificial networks trained to recognize surfaces have the same difficulties to recognize them in 3D optical illusions (as humans have).

Source: CNN International, “robots tricked by optical illusion“.

A fairly good one created by Ava7.com.