lo-res
adjective /ˌləʊ ˈrez/
  /ˌləʊ ˈrez/
(also low-res)
 (informal)- (of a photograph or an image on a computer or television screen) low-resolution (= not showing a lot of clear detail)
- a lo-res scan
 
Word Originlate 20th cent.: from low-resolution.