What is this called?

[IceCold]

What is this effect called and how can you do this?

 

[axxo]

this looks like one of the filters for iphone, you can do the same thing with sharpen, contrast (play with the curves of the light on the image)

 

[IamSam]

Well.....that's a loaded question! I assume your asking about the effect.

Take a look here: https://www.photoshopgurus.com/foru...-n-k-s-popular-special-effects-explained.html

Be sure and follow all links! Good luck!

 

[Tom Mann]

...you can do the same thing with sharpen, contrast (play with the curves of the light on the image)

Sorry, but you can not approximate it using only PS's "sharpen" tool. The sharpening radius simply isn't large enough. However, you can get moderately close to this effect using PS's "unsharp mask tool" with a radius in the range of several tens of pixels. Even then, it's not very close. I'm pretty sure that the link Sam suggested contains links to discussions of this effect. If not, try Googling {photoshop local contrast} for DIY approaches, or look at the various Topaz plugins for PS, especially Topaz Adjust and Topaz Clean.

Tom M