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
You’d be forgiven for thinking the videocassette format long-dead, but it turns out that Betamax is still around. Sony is finally going to withdraw tapes from sale, bringing a 40-year story to an end. The last recorders were sold in 2002. ベータビデオカセットおよびマイクロMVカセットテープ出荷終了のお知らせ [Sony; via The Verge]
A leaked Comcast memo discloses that the company’s consumer data caps have nothing to do with network congestion, contrary to its public claims. The internet service provider has often complained (such as when lobbying against net neutrality) that it must impose limits on service to prevent network congestion. The argument suggests that these measures are […]
LA Makerspace co-founder Tara Tiger Brown shares a project that her kid-friendly maker workshop is trying to make a reality.
Celebrate Cyber Monday with some brain food. Save on any eLearning deal in the Boing Boing Store today using coupon code: CYBERMONDAY25. Below are a couple of our favorite eLearning offers: eduCBA Tech Training Bundle: Lifetime Subscription:Welcome to your personal online classroom, where you can finally study at your own pace, on your own time (and […]
This minimalist multi-tool will see to it that instead of rocking a tool belt, you’ll carry just one. It’s shaped slightly like a key and weighs less than an ounce, so it plays nice with your keychain. The strong surgical-grade stainless steel blade will last, and is handy for everyday tasks like opening boxes and […]
The Code Black is our top-selling drone of all time—and for good reason. This powerful, palm-size drone is not only insanely fun to fly, but can capture some serious video footage from up above. With a flight time of about 10 minutes and an ultra-smooth ride, it’s a great introductory drone for anyone looking to […]