uriart,
Someone from our forumchan gave a reference to adjust the image in Photoshop. I saved this link and now I share with you.
I managed to "straighten" krivosfotografirovannye work and give them the proper rectangular shape, and so agree, the pictures look better, despite the poor lighting.
I am sure that you like and I've mastered what's what.
http://www.arthit.ru/useful/to-make-photo-r.html