In a gallery of optical illusions on Facebook, one of the items that gained my attention was this Republic of Palau silver coin. The author behind Don Quixote motive (engraved on this coin) is great #Sandro Del Prete, and apart from the illusion, I was even more baffled with the Palau Republic. I have never heard of Palau. Oh, and the illusion should easily be seen, specially if you’re a Don Quixote fan, like I am…
Here’s a nice submission. This one was sent in by John Newman, who has seen this type of illusion hundreds of times around the net, but never in real life!
Remember when doing our duty, most of the time we let our thoughts slip by, and before you know it – illusions start appearing in front of our eyes! The thing is… do you see all those gray spots appearing at the white intersections below? They aren’t really there (just so that you know)…
Horizons is the name of this piece of art by Neil Dawson . It is located in New Zealand on “The Farm,” a large private art park owned by Alan Gibbs, a New Zealand businessman.
Curious : If you can’t see the optical illusion you may have schizophrenia!
Emergence of images refers to the unique human ability to aggregate information from seemingly meaningless pieces, and to perceive a whole that is meaningful. This special skill of humans can constitute an effective scheme to tell humans and machines apart. This paper presents a synthesis technique to generate images of 3D objects that are detectable by humans, but difficult for an automatic algorithm to recognize. The technique allows generating an infinite number of images with emerging figures. Our algorithm is designed so that locally the synthesized images divulge little useful information or cues to assist any segmentation or recognition procedure. Therefore, as we demonstrate, computer vision algorithms are incapable of effectively processing such images. However, when a human observer is presented with an emergence image, synthesized using an object she is familiar with, the figure emerges when observed as a whole. We can control the difficulty level of perceiving the emergence effect through a limited set of parameters. A procedure that synthesizes emergence images can be an effective tool for exploring and understanding the factors affecting computer vision techniques.
A friend sent me our newest exhibit. We had some egg illusions in the past, but have to admit this is different. In its core, this optical illusion is very similar to the famous Missing Part test. Additionally, it may remind you of those missing China men, extra Leprechauns, Mad Scientist soccer team… you know what I mean. To make you understand what is going on around here, let me explain first. In the first card (A) we have one chicken and 8 eggs. Cut this card in 4 pieces (like outlined below), and then again assemble it in a different matter (card B), resulting with proper rectangular image. You will get our original chicken, but the number of eggs this time is different. Additionally, there is a missing piece in this newly assembled card. Why is that? If the surface of both puzzle cards is equal, how can one be missing a piece? Hint: are the surfaces really equal? You tell me! Remember, there is more than one optical illusion present here.
From Archimedes Lab.
I’ve been posting Sandro Del Prete’s optical illusion artworks for a long time. Today I bring you one of his awesome impossible paintings, not so many people even heard of. Now little bit of Sandro’s biography.
Sandro Del-Prete was born in 1937, and is a Swiss artist who paints figures, situations and processes that cannot exist in the real world. Comparisons can be drawn between Del-Prete and Escher’s artwork, although they differ in subject matter, style, mood and technique. Del-Prete greatly admires Escher and believes that they are ‘kindred spirits’, however the viewer will find very little mathematical precision in Del-Prete’s work, something that is always present in Escher’s work.