Apple Inc. (AAPL) unloaded a ton of announcements at Tuesday's big annual event, but one small shout-out may have gotten lost in the fray. 

As part of a demo of the 10th anniversary iPhone X's AR capabilities, the tech giant briefly mentioned that it's working with Snap Inc. (SNAP) to create hyper-realistic filters that can track your face movements. The news caused shares of the Snapchat parent company to rise at least 2% mid-afternoon on Tuesday. It ended the regular session down slightly, but was up 0.07% to 15.19 after-hours. 

Apple on Tuesday released three new versions of its mainstay iPhone, including the iPhone 8, 8 Plus and the iPhone X. All three models incorporate varying levels of augmented reality technology via Apple's ARKit and iOS 11, but the iPhone X has a special notch at the top of its edge-to-edge screen that houses advanced facial recognition and tracking technology. The features are primarily used for Face ID, the facial recognition software that allows users to unlock their phone with their face instead of a traditional password.

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But Apple's senior vice president Craig Federighi demonstrated other capabilities for the facial recognition technology, one which includes improved face mapping that's being used to power super realistic face filters on Snapchat. To show off the features, Federighi used a filter on what looked like a custom version of Snapchat that applied a green and blue medieval-esque mask to his face. The mask the continued to mold to his face as he moved it around. 

Apple working with @Snapchat to step up your selfie game #AppleX #AppleEvent via @VRScout #technology #Ai #snap

pic.twitter.com/T60sU1q023

— Sanem Avcil #Arkit (@Sanemavcil) September 12, 2017

Snap has been able to use the iPhone X's advanced AR features, as well as Apple's developer platform ARKit, to build more realistic and detailed lenses. Lenses are powered by augmented reality technology in that they overlay images or graphics onto a users' face via the phone's front-facing camera. The filters can also add moving graphics and stickers in real-world environments like live video.

The Snapchat lenses Federighi demoed are more advanced than prior ones on the app because they're personalized for unique facial contours and can reflect and react to ambient light in the room. However, unlike Apple's other AR features, which are powered by facial recognition technology, Snapchat uses object recognition. Object recognition uses an algorithm that understands the general nature of how things appear in an image. The technology differs from facial recognition in that it recognizes faces in general, but can't recognize a specific face, according to Snapchat's website. 

The ephemeral messaging app stands to see some of the biggest benefits from Apple's big push into augmented reality. Snap largely popularized AR through its lenses and filters, but many analysts believe Apple will serve as a major force behind AR seeing widespread consumer adoption. This  could open up opportunities for advanced Snap features later on down the line, such as AR features in Snap Maps, among other things. 

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