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There are many face image datasets for image recognition, but I'm looking for one that focuses on images that show the mouth, and are tagged with if the face is showing their teeth or not. Could be smiling or making a face like Jack Nicholson in The Shining.

I'd also take a selfie image dataset, and then I could do the teeth-tagging myself.

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One potential dataset is the Selfie Data Set

Selfie dataset contains 46,836 selfie images annotated with 36 different attributes divided into several categories as follows.

Gender: is female.

Age: baby, child, teenager, youth, middle age, senior.

Race: white, black, asian.

Face shape: oval, round, heart.

Facial gestures: smiling, frowning, mouth open, tongue out, duck face.

Hair color: black, blond, brown, red. Hair shape: curly, straight, braid.

Accessories: glasses, sunglasses, lipstick, hat, earphone.

Misc.: showing cellphone, using mirror, having braces, partial face. Lighting condition: harsh, dim.

There are a few tags that may be useful, for example, see the bold ones above.

Reference: Mahdi M. Kalayeh, Misrak Seifu, Wesna LaLanne, Mubarak Shah, How to Take a Good Selfie?, in Proceedings of ACM Multimedia Conference 2015 (ACMMM 2015), Brisbane, Australia, October 26-30, 2015.

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