Application of tpsDig2 Software in Nasal Angle Measurements

Area of Science:

• Forensic Anthropology
• Human Identification
• Facial Morphology

Background:

• Nasal parameters like shape and angles offer insights into demographic and environmental factors.
• The nose is a key facial feature influencing individual appearance.
• Accurate sex determination is crucial in forensic investigations.

Purpose of the Study:

• To develop and validate an automated method for sex determination using nasal angles.
• To assist anthropologists and forensic experts in human identification.
• To explore the utility of nasal angles in forensic scenarios and facial reconstruction.

Main Methods:

• An automated approach using tpsDig2 software for nasal angle measurements.
• Measurement of three nasal angles (nasal prominence, inter-alar, nasal tip) in 500 North Indian subjects (250 males, 250 females).
• Application of discriminant function statistics for sex determination.

Main Results:

• Significant differences in nasal angles were observed between males and females.
• The developed statistical model achieved 64% accuracy in correctly classifying original grouped cases.
• The automated method demonstrated efficiency and specificity in sex determination from nasal angles.

Conclusions:

• The automated method for nasal angle measurement provides a reliable tool for sex determination in forensic contexts.
• This technique can aid in facial reconstruction and identification cases.
• Further research may explore correlations with other facial features for plastic surgery and aesthetic applications.