Spectrophotometric and tristimulus analysis of the colors of subcutaneous bleeding in living persons

Yukihito Yajima, Masayuki Nata, Masato Funayama

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


In forensic activities the estimation of the age of subcutaneous bleeding is very important. The evaluation of color, however, will vary according to differences of light-source, observer, size, background and so forth. The colorimetric methods using a spectrophotometer can effectively evaluate skin discoloration. In this study, the tristimulus and spectrophotometric patterns of color changes of skin bruises were examined among eight Japanese adult men volunteers wounded by a sharp pinch on the inside of the upper arm and forearm. From a series of color changes among the subjects, the tristimulus data and the spectral reflectance graphs showed variable patterns that made a comparison of absolute numerical values by a single measurement meaningless. Therefore, if we use colorimetric methods in a practical case, we should measure bruises in the same lesion twice or more at intervals of 1 or 2 days.

Original languageEnglish
Pages (from-to)S342-S343
JournalLegal Medicine
Publication statusPublished - 2003


  • Spectrophotometer
  • Subcutaneous bleeding

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Issues, ethics and legal aspects


Dive into the research topics of 'Spectrophotometric and tristimulus analysis of the colors of subcutaneous bleeding in living persons'. Together they form a unique fingerprint.

Cite this