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Are there known algorithms or a good approach to aging a person's photo?
Assuming you know the position of eyes/nose/mouth/shape of head what techniques exist to age someone's portrait?
For the iPhone, there are apps like AgingBooth and AgeMyFace, and I was wondering how they accomplished that.
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YouCam Makeup is the best aging app to show age progression on a photo for free. With its Time Machine feature, the YouCam Makeup app users can take or upload a photo, and the app will auto-detect the user's current age, and how he or she will look in any age range from 12 to 70 years old.
Most people begin to notice a shift in the appearance of their face around their 40's and 50's, with some also noticing a change in their 30's. But with these physical changes brought on by aging also comes a change in the appearance of our face - Luckily, there is treatment available.
Age-progressing is done using a photograph of a child. With a single photograph as the input, a complex process is then used to produce future images as a child's face evolves. Time has an impact on physical appearance, and so do facial expressions, which are influenced by both internal and external factors.
Oldify. Oldify helps you determine how your child will look at a specific age. Plus, it will transform their photo to the age you want them to be, and it works with any photo from the gallery or camera, so you can instantly age anyone. You can view your baby's future self as a photo or video.
Here's a good article on how age progression is done at the Forensic Anthropology and Computer Enhancement Services Laboratory. From the article:
A child's face broadens and lengthens, because faces grow downward and outward. Secondary teeth grow in, and the bridge of the nose rises. The cranium expands, the eyes narrow, the mouth widens and the nose lengthens. Light-colored hair tends to darken. By age twelve, the face looks fairly mature, with the chin forming and the nose still growing. Eventually the cheekbones take on more prominence and eyebrows fill in.
I'm no expert, but I'd imagine that the apps you can find online and at Apple's app store probably take common tendencies like these into account and apply them to any photo you upload. It seems like a lot more information is required for accurate results.
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