Table 1 ITU-R quality and impairment scales in BT.500-11
From: Blind image quality assessment via semi-supervised learning and fuzzy inference
Level | Impairment | Quality |
|---|---|---|
5 | Imperceptible | Excellent |
4 | Perceptible, but not annoying | Good |
3 | Slightly annoying | Fair |
2 | Annoying | Poor |
1 | Very annoying | Bad |