Acne AI Score

BelleTorus Confidential

Last update: 29 Jul 2025

Global Acne Evaluation (GEA) scale

Dréno et al, 2011

Tan et al, 2007

Belle severity score

from our paper

• si: severity of lesion I
• ai: area of lesion I
• A: total area of skin on the image
• N: total number of lesions

from our paper

• si: severity of lesion I
• ai: area of lesion I
• A: total area of skin on the image
• N: total number of lesions

Conversion to GEA scale

You can download the detailed slides here

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