Skin Hyperpigmentation Index (SHI)


  • Pigmentation Score from pigmented skin:
  • Pigmentation Score from normal skin:
  • Skin Hyperpigmentation Index (SHI):


Upload the images of the hyperpigmented 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 SHI results

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


  • Bossart S, Cazzaniga S, Willenberg T, Ramelet AA, Heidemeyer K, Uthoff H, Baumgartner M, Hunger RE, Seyed Jafari SM. Reliability Assessment and Validation of the Skin Hyperpigmentation Index Compared to the Physician Global Assessment Score. Dermatology. 2022;238(4):688-691. doi: 10.1159/000520753.
  • Bossart S, Ramelet AA, Willenberg T, Cazzaniga S, Baumgartner M, Heidemeyer K, Hunger RE, Seyed Jafari SM. Skin Hyperpigmentation Index Facilitating Quantification of Hyperpigmentation in Clinical Practice. Dermatology. 2021;237(3):486-488. doi: 10.1159/000509160.
  • Bossart S, Willenberg T, Ramelet AA, Cazzaniga S, Hunger RE, Seyed Jafari SM. The skin hyperpigmentation index: An objective method of measuring the intensity of hyperpigmentation after sclerotherapy. Phlebology. 2020;35(10):833-835. doi: 10.1177/0268355520941359.
  • Bossart S, Cazzaniga S, Willenberg T, Ramelet AA, Baumgartner M, Hunger RE, Seyed Jafari SM. Skin hyperpigmentation index: a new practical method for unbiased automated quantification of skin hyperpigmentation. J Eur Acad Dermatol Venereol. 2020;34(7):e334-e336. doi: 10.1111/jdv.16312.


Simon Bossart, S. Morteza Seyed Jafari

Developer and support

Simone Cazzaniga

Scientifical advisors

Torsten Willenberg, Albert-Adrien Ramelet, Marc Baumgartner, Kristine Heidemeyer, Robert Hunger


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