The tools are called sharpen and denoise respectively, and as the English names suggest, the tools can be used to increase the sharpness of an image afterwards, as well as to reduce the noise that often occurs in images taken in poor light.
The new tools are turned on from the server side, so an update of the app should not be necessary, writes 9 to 5 Google. The tools are not yet available in Google Photos for iPhone.
A Google One subscription should not be required to use the features.
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