About map the scores to the ranks

[w-qhai]

Thanks for your work, can you please publish the code of how to map the scores to the levels,
I tried to get the max and min scores from train_koniq.json

Then I tried to map the scores to levels.

max_score = 85.0608108108
min_score = 6.68487394958

delta = (max_score - min_score) / 5

# map score to level
levels = ["bad", "poor", "fair", "good", "excellent"]
if score < min_score + delta:
        ll = 0
    elif score < min_score + 2*delta:
        ll = 1
    elif score < min_score + 3*delta:
        ll = 2
    elif score < min_score + 4*delta:
        ll = 3
    else:
        ll = 4
print(levels[ll])

Most of them are correct, but 74 are wrong.