Instead of using cut and paste you should use copy and paste in case something goes wrong to avoid losing files. Are the images still on the iPad? Have you tried using iTunes instead of Windows Explorer?
I learnt the lesson of not cut-pasting anymore.I used windows explorer ,dont had itunes in that PC. No they are not in Ipad as the files are cut-pasted and some of them appear good and some as grey tiles(the corrupted one.)
Any recovery method please.