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Amazing sleeveface

 

I like very much this kind of sleeveface

The magical shelf for books


The magical shelf optical illusion for books
It’s a real product. If you think about it real hard, you might be able to figure it out and make it for yourself. Otherwise, you’ll have to buy it.

Face fat up , face thin down , only an illusion

 

Maybe you know  that faces are more difficult to recognize when they’re upside-down and that sometimes we misperceived the facial expressions of upside-down faces .

But  Peter Thompson ,  from the University of York (UK) discovered an amazing optical illusion !

We can name it  The Fat Face Thin illusion. Your assignment is to compare the upside-down face on the left of the lower figure with the upright face on the right. Have you noticed how the upside-down version looks much thinner?! Moreover it appears longer shaped than the upright version. Of course, there is no need to mention how both pictures are identical. This illusion illustrates the internal features of the face (eyes, nose, mouth) can distort our perception of face shape.

What is it ?

This is a rare and curious  image…..

Can you tell what it is?

A Geometric Paradox


A Geometric Paradox or an optical illusion?

Emerging images from dots.Optical illusion

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.

Optical illusion. Magic Eggs

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.