|Quoting Flipdewaf (Reply 1):|
I know the first two are probably not salvageable but I toiled in the extreme cold for them.
Actually, they're not bad. #1 is over-sharpened, and #2 is a bit grainy and a touch soft, but both only need a bit of work. I couldn't promise they'd get in, but it might be worth a shot after a bit of work.
#3 is also slightly over-sharpened, and needs a lot more contrast. #4 is just about right, but also suffers from a touch of over-sharpening (see the leading/trailing edges of the wing).
Overall, I think all four would stand a chance if you put a little time into fixing the minor issues they each have.
As Hongyin said, not a chance on the first two, the quality is way too low. The third one is better, but the contrast is too harsh, and you can see all the dirt spots on the window, so also no.