- Tram Ho
In September, Google announced artificial intelligence light control for its Pixel smartphones, allowing users to adjust the direction and intensity of light in portrait photos even after. captured.
On Pixel 4, 4a, 4a (5G) and Pixel 5 (and later older Pixel models via software update), Portrait Light will automatically be applied to photos in The default and Night Sight level have humans in them. With Portrait Mode Portrait Mode, Portrait Light can also allow users to adjust the light quality is no different than photos taken in the studio.
To be able to train the artificial intelligence for Portrait Light, Google needs thousands of portraits of people in different lighting conditions. In a blog post, Google explains: “The Portrait Light feature adds an adjustable light source to the photo, with the default direction and intensity automatically selected to match the natural light source. We train the AI with a new technique, using data gathered from a system called Light Stage. “
The two models used by Google include automatic directional lighting and post-capture artificial creation. The first model will ‘look’ at your portrait, then add a light source similar to a flash the photographer will actually use. The second model adds an artificial light source that matches the scene and existing lighting. Both of these models are trained through the Light Stage system mentioned by the company:
Stage Light System
This system consists of 64 cameras and 331 LEDs placed in the sphere, will capture portraits of a person in a series of different directions. Through the information received, AI will understand how to illuminate portrait photos in any lighting conditions, so that it can add a new light source in the most natural way.
Google says Portrait Light will be just the first step in creating lighting upscaling in photos using AI and machine learning.
Source : Genk