We used the Skin Of Mine Acne module at skinofmine.com to quantify acne of six individuals, where the severity of the acne of the individuals ranged from none to severe. In each case, the computer mouse was used to manually highlight the areas of concern for each individual. Results are shown below. The lower row of images shows the highlighted regions in green.
Quantification results coincide well with visual assessments. Note that for individual 3 (Acne Index of 56) the index would likely be higher if the entire face were exposed.