Browsing archives for 'Estimation'

Dynamic Muller-Lyer Illusion

Animation,Estimation 5 July 2017 0 Comments

Dynamic Muller-Lyer Illusion

Gianni Sarcone emailed me earlier today letting me know about a new animation that he created based on a classic optical illusion.  The animation consists of 26 different frames and helps to demonstrate the Muller-Lyer illusion.  In this illusion, discovered in the late 19th century, the presence of arrows gives the appearance that equal segments […]

Algae by Akiyoshi Kitaoka

Estimation 9 June 2017 0 Comments

Algae by Akiyoshi Kitaoka

The six thin strips within this circle, created by Professor Akiyoshi Kitaoka, appear to tilt alternately.  In reality, each of the strips are all parallel with one another.  It certainly does not appear that way, but if you hold up a straight edge to the side of each of them, you will see that they […]

Squaroo by Gianni Sarcone

Estimation,Motion 17 April 2017 0 Comments

Squaroo by Gianni Sarcone

Here is a new optical illusion from Gianni Sarcone that I found while browsing his Red Bubble portfolio.   If you haven’t visited it, I would encourage you to do so as there are a lot of great designs to admire. With respect to today’s optical illusion, there are a couple of things going on. First, […]

Torii Illusion (Hering and Zöllner)

Estimation 5 January 2017 0 Comments

Torii Illusion (Hering and Zöllner)

Happy New Year everyone! Proferssor Dejan Todorović of the University of Belgrade created this optical illusion that highlights the effects of two different illusions known as the Hering illusion and the Zöllner illusion.  The blurred orange lines (representing a Torii, a traditional Japanese gate located in front of a shrine) are identical in all three […]

Candy Cane Optical Illusion

Estimation 21 December 2015 0 Comments

Candy Cane Optical Illusion

In the spirit of the holiday season, today’s optical illusion features a series of red and white candy canes.  When you look at these seven pieces of candy, do they appear to be parallel to one another or are they askew?  If you want to be certain, grab something with a straight edge and hold […]

Terror Subterra by Roger Shepard

Estimation 21 September 2015 0 Comments

Terror Subterra by Roger Shepard

It certainly does not appear to be true, but the two monsters shown in this illustration are identical in size.  It looks like the monster in the background is significantly larger than the one in the foreground (maybe even twice the size).  This was originally published in Roger Shepard’s book “Mind Sights” in 1990.  In […]

Concentric Circles by Akiyoshi Kitaoka

Estimation 20 July 2015 0 Comments

Concentric Circles by Akiyoshi Kitaoka

Have a look at today’s image that was created by Professor Akiyoshi Kitaoka from Ritsumeikan University in Kyoto, Japan.  We’ve posted images similar to this one in the past, but I thought that it was a pretty good representation of an old optical illusion concept.  Each of the rings are circles, even though they certainly […]