Here's how Snapchat is able to transform your face into a puppy

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It's all about Snapchat these days.

The app started by a college kid now has more daily video views than Facebookmore users than Twitter, and is extremely popular with millennials.

One of the things that makes Snapchat stand out right now is the filters. Thanks to Snapchat, we now know what it would look like if we were able to barf rainbows, swap faces with our spouse, or see our best friend wearing a Coachella flower crown.

But how do they do it when everyone's faces are different?

Vox recently put together a video to explain exactly what happens in the seconds between you holding your thumb on the screen and transforming into a puppy.

Check it out below:

Basically, there's a lot of science that goes into a computer's ability to recognize different faces. The general process, though, is detecting areas of light and dark – it's how we tag photos of our friends on Facebook.

Snapchat took that detection process one step further by mapping out tons of different faces. Then they use a patented technology that finds a face most like yours and adjusts to different proportions to create a moveable mask that works for everyone.

Snapchat spent $150 million on a Ukrainian startup called Looksery that developed the technology, Vox says.

All that for a few seconds of fun? It seems to be working for Snapchat – they introduced the filters last fall, and their daily video views have increased 400 percent since May 2015.

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