Presented at the 62nd Annual Meeting of the American Academy of Forensic Sciences, February 22–27, 2010, in Seattle, WA.
Exsanguinated Blood Volume Estimation Using Fractal Analysis of Digital Images*
Article first published online: 6 FEB 2012
© 2012 American Academy of Forensic Sciences
Journal of Forensic Sciences
Volume 57, Issue 3, pages 610–617, May 2012
How to Cite
Sant, S. P. and Fairgrieve, S. I. (2012), Exsanguinated Blood Volume Estimation Using Fractal Analysis of Digital Images. Journal of Forensic Sciences, 57: 610–617. doi: 10.1111/j.1556-4029.2012.02056.x
- Issue published online: 19 APR 2012
- Article first published online: 6 FEB 2012
- Received 14 Aug. 2010; and in revised form 3 April 2011; accepted 16 April 2011.
- forensic science;
- blood stain pattern analysis;
- blood volume estimation;
- fractal analysis
Abstract: The estimation of bloodstain volume using fractal analysis of digital images of passive blood stains is presented. Binary digital photos of bloodstains of known volumes (ranging from 1 to 7 mL), dispersed in a defined area, were subjected to image analysis using FracLac V. 2.0 for ImageJ. The box-counting method was used to generate a fractal dimension for each trial. A positive correlation between the generated fractal number and the volume of blood was found (R2 = 0.99). Regression equations were produced to estimate the volume of blood in blind trials. An error rate ranging from 78% for 1 mL to 7% for 6 mL demonstrated that as the volume increases so does the accuracy of the volume estimation. This method used in the preliminary study proved that bloodstain patterns may be deconstructed into mathematical parameters, thus removing the subjective element inherent in other methods of volume estimation.