There's a general rule of thumb in a growing community like this one - if the photo is better than anything there already is, it is accepted. If it is comparably good then it must differ in a noticeable and useful way from the ones already in the database.
If you think your photo would qualify, bearing the abovementioned in mind, then you're most welcome to upload it. The final decision is for the image inspector to make, however.
(BTW, "better" does not imply greater resolution only).