Hi,
I assume that 'the other end' means your computer screen, where you look at the page you just scanned in.
I scan something but it's not very clear at the other end. What adjectives would describe that?
Scan is _____________?
distorted, blurry? Do these sound right? Is there any more?
Blurry sounds OK. You might just say 'the page didn't scan very well'.
'Distorted' is a more formal word, that tends to suggest letters or shapes are curved or wavy in some way. It doesn't just mean you can't read them.
Best wishes, Clive