Ίσως τελικά να μην υπάρχει beautification filter στα selfies αλλά πιο επιθετικό noise reduction:
https://blog.halide.cam/iphone-xs-why-its-a-whole-new-camera-ddf9780d714c
What’s this about a ‛soft filter’ on my selfies?
It doesn’t exist. I don’t want to say that some people make up controversies to get Youtube impressions, but you do have to take things on the internet with a grain of salt.
People feel the iPhone XS ‛smoothens’ things for two reasons:
Better and more aggressive noise reduction due to merged exposures, and
Merged exposures reducing sharpness by eliminating sharp light/dark contrasts where light hits parts of the skin
For the latter, it’s important to understand how our brains perceive sharpness, and how artists make things look sharper.
It doesn’t work like those comical CSI shows where detectives yell ‛enhance’ at a screen. You can’t add detail that’s already been lost. But you can fool your brain by adding small contrasty areas.
Enhance! Okay, maybe that’s a bit too enhanced.
Put simply, a dark or light outline adjacent to a contrasting light or a dark shape. That local contrast is what makes things look sharp.
To enhance sharpness, simply make the light area a bit lighter near the edge, and the dark area a bit darker near the edge. That’s sharpness.
The iPhone XS merges exposures and reduces the brightness of the bright areas and reduces the darkness of the shadows. The detail remains, but we can perceive it as less sharp because it lost local contrast. In the photo above, the skin looks smoother simply because the light isn’t as harsh.
Observant people noticed it isn’t just skin that’s affected. Coarse textures and particularly anything in the dark— from cats to wood grain— get a smoother look. This is noise reduction at work. iPhone XS has more aggressive noise reduction than previous iPhones.