This is one of the neatest optical illusions I've ever seen. Viewed up close, Mr Angry is on the left and Mrs Calm is on the right. If you back up, they swap places. Even works if you print it out. Link (thanks, suckup!)
Reader comment: Hello, Just wanted to send a followup to the Mr. Angry and Mrs. Calm optical illusion post on Boing Boing. My name is Michael Mack and I worked with Dr. Aude Oliva (she authored the paper about this illusion with Dr. Philippe Schyns) for a couple years at Michigan State University before she went to MIT (where she is now). I didn't do any work directly related to this particular paper, but we worked quite a bit on using this type of illusion for other psychological experiments in perception and vision. A slightly more famous example of this illusion deal with switching between Margaret Thatcher and Tony Blair (http://cvcl.mit.edu/gallery.htm). Dr. Oliva also has a with a couple more examples (http://cvcl.mit.edu/Papers/HybridFaces_AudeOliva.pdf).
The illusion works by manipulating the spatial frequencies of the image. The low spatial frequencies (the rough, fuzzy shape information of an image) from one image (e.g. Mr. Angy) are combined with the high spatial frequencies (the sharp edge information of an image) from a different image (e.g. Mrs. Calm). When viewing this hybrid image at a close distance, our perceptual system is able to extract and process the high spatial frequencies and thus we see the image where the high spatial frequencies were taken from. When viewing the hybrid image at a distance further away, our perceptual system can no longer extract the high spatial frequencies meaning we only see the low spatial frequency information, thus we see the other image. You can also get a switch in the hybrid image by squinting."
Aude's website is: http://cvcl.mit.edu/
My website is: http://people.vanderbilt.edu/~michael.mack
This gadget does exactly as promised: it looks like a thumbdrive (sort of) and fries the circuitry of any computer it’s plugged into. It’s made from camera flash parts, is charged with a standard AA battery, and delivers a 300V zap of DC destruction to the port for all your USB-murdering needs. Note that this […]
The Cobham catalog, exposed by The Intercept, features countless pages of surveillance gadgets sold to U.S. police to spy on American citizens: tiny black boxes with a big interest in you. In the creepily bland feature lists and nerdy product names is a whisper of a dark future; perhaps darker than anyone can imagine.
This image depicts the most commonly-found stylesheet colors on the web’s top sites—Paul Hebert did an amazing amount of analysis and this is just one of the intriguing visualizations he came up with. Most of these are obvious staples, especially HTML red and blue, though it’s interesting how far the blue “cluster” is from the […]
The Boing Boing Store’s Gift Guide is full of ideas for pretty much anyone in your life like hipster ice cub trays, Xbox controllers, Halo Boards, and even diamond necklaces. As always, all products in the Boing Boing Store come at great discounts, too. Shop by price bucket starting at under $20. Under $20:Bloxx Jumbo Ice Trays […]
Unlike traditional lighters, the SaberLight features an electronic plasma beam that’s both rechargeable and butane-free. This sleek lighter is even approved by TSA, so you’ll never be stuck buying lighters you’ll just have to throw away partially used. For some people, like me, this is a pretty big game-changer. The SaberLight’s beam is actually both hotter and cleaner […]
Holiday shopping is in full swing, and the Striiv Touch is one of the best gift ideas I’ve landed on. Its simple design works for females and males, and its wide range of features makes it suitable for even the non-fitness enthusiasts in your life.Unlike traditional fitness trackers, the Striiv Touch also acts as a smartwatch. It […]