I often use Snapseed and I don't really think it can so the defringing fix. I do not know what a keystone distortion is so I do not know how that would be fixed. I agree with the other poster using the many filters and textures would surely help fix problems in an image. Give it a few tries. I say few tries because Snapseed may bomb out on one image and do a splendid job on others. It is hot and miss when playing with images.
I like Snapseed and I really don't have negatives at this time to rant about. But I can say that every image is different and what worked for one may not work for the next so keep playing!
|I am an Elephant by Bibix|
from An A to Z of Subjects- Week 5, E
|Mossy forest panorama by Jill Hancock|
from Your point of view
|Ship Moon and Stars by LJJohnston|
from For creative newbies only..