Originally posted by kh1234567890 Sharpen seems to be pretty good at deciding what needs sharpening, even without masking.
Depends which mode is used. I used Focus mode on a test image of a tree trunk with beach, sea, clouds slightly out of focus in the background. It decided to sharpen about half of the background area.
Out of the 3 modes (sharpen, stabilize and focus), sharpen doesn't seem to change textures , stabilize modifies part of the image that have directional blur (e.g anything that looks like motion blur even if it's not , such as an architectural detail in perspective and slightly out of focus will be understood as motion blur by the AI engine), Focus replaces out of focus areas by textures from its database, so I happen to get get some kind of crocodile skin replacing gravel concrete floor that was slightly out of focus. That's why, the tool offer a preview of the original and the 3 sharpening modes side by side in the same window, so that a human can make a wise choice.