RETRACTED: Is photoshop with Qualitative Image Analysis a valid technique for measuring hair morphology? A test using wires of known dimensions November 2019 in “ Journal of Vertebrate Biology ” Christopher Glueck, James A. Wilson We don't know much about this study yet. We're maintaining the world's largest resposity of hair loss research. You can help out the community by sending a PDF of this study here . Not sure how to get a study's PDF? You can email the authors of the study. View this study on bioone.org →
research Quantifying Variation in Human Scalp Hair Fiber Shape and Pigmentation 32 citations , March 2016 in “American Journal of Physical Anthropology” African hair is curled, Asian hair is thick, European hair is lighter, and chemical methods help identify hair color differences.
research Shape Variability and Classification of Human Hair: A Worldwide Approach 95 citations , January 2007 in “Human biology” Human hair can be classified into eight types based on physical features, not ethnicity.