Skin Redness Index (SRI)


  • Redness Score from erythematous skin:
  • Redness Score from normal skin:
  • Skin Redness Index (SRI):


Upload the images of the erythematous/inflammed skin area (clinical or dermoscopic image) and of reference normal skin in the appropriate boxes and press the "Calculate" button. If necessary, you can interactively crop and zoom-in on a desired portion of the images to be analyzed. Circle crop selection can also be used.

Interpretation of the SRI results

1: no redness
1-2: light redness
2-3: medium redness
3-4: severe redness
4: maximum redness


  • Bossart S, Cazzaniga S, Heidemeyer K, Feldmeyer L, Simon D, Hunger RE, Seyed Jafari SM. Skin redness index: A new practical method for unbiased automated quantification of skin redness. J Eur Acad Dermatol Venereol. 2023 Nov 1; doi:10.1111/jdv.19619.


S. Morteza Seyed Jafari, Simone Cazzaniga, Simon Bossart

Developer and support

Simone Cazzaniga

Scientifical advisors

Kristine Heidemeyer, Dagmar Simon, Robert Hunger


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