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Accuracy and Repeatability of Trajectory Rod Measurement Using Laser Scanners
- Source :
- Journal of forensic sciences. 63(5)
- Publication Year :
- 2017
-
Abstract
- Three-dimensional (3D) technologies contribute greatly to bullet trajectory analysis and shooting reconstruction. There are few papers which address the errors associated with utilizing laser scanning for bullet trajectory documentation. This study examined the accuracy and precision of laser scanning for documenting trajectory rods in drywall for angles between 25° and 90°. The inherent error range of 0.02°-2.10° was noted while the overall error for laser scanning ranged between 0.04° and 1.98°. The inter- and intraobserver errors for trajectory rod placement and virtual trajectory marking showed that the range of variation for rod placement was between 0.1°-1° in drywall and 0.05°-0.5° in plywood. Virtual trajectory marking accuracy tests showed that 75% of data values were below 0.91° and 0.61° on azimuth and vertical angles, respectively. In conclusion, many contributing factors affect bullet trajectory analysis, and the use of 3D technologies can aid in reduction of errors associated with documentation.
- Subjects :
- Accuracy and precision
Laser scanning
Computer science
Acoustics
010401 analytical chemistry
Ballistics
Repeatability
Laser
01 natural sciences
0104 chemical sciences
Pathology and Forensic Medicine
law.invention
Azimuth
03 medical and health sciences
0302 clinical medicine
law
Genetics
Trajectory
Range (statistics)
030216 legal & forensic medicine
Subjects
Details
- ISSN :
- 15564029
- Volume :
- 63
- Issue :
- 5
- Database :
- OpenAIRE
- Journal :
- Journal of forensic sciences
- Accession number :
- edsair.doi.dedup.....6d58fd7ff0bca798bcfb198ec30397ac