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Similaire à Keynote Presentatio - Forensic Laser Scanning by Eugene Liscio
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Keynote Presentatio - Forensic Laser Scanning by Eugene Liscio
- 1. Forensic Laser Scanning Eugene Liscio, P. Eng. Present and Future
- 2. oAI2-3D, Established 2005, Documentation, Analysis and Visualization… oProfessional Engineers Ontario, October 1997 oPresident of International Association of Forensic & Security Metrology, (IAFSM, www.iafsm.org) oAdjunct Professor, 3D Forensic Reconstruction Course at the University of Toronto, Mississauga, January 2013 oResearch & Validation in “3D Forensics” oCo-Developer of Clouds2Max plugin for 3ds Max oFARO Certified Trainer, January 2014
- 4. oAI2-3D, Established 2005, Documentation, Analysis and Visualization… oProfessional Engineers Ontario, October 1997 oPresident of International Association of Forensic & Security Metrology, (IAFSM, www.iafsm.org) oAdjunct Professor, 3D Forensic Reconstruction Course at the University of Toronto, Mississauga, January 2013 oResearch & Validation in “3D Forensics” oCo-Developer of Clouds2Max plugin for 3ds Max oFARO Certified Trainer, January 2014
- 5. o3D Forensic Reconstructions oDocumentation Technologies oLaser Scanner Accuracy Issues oMulti-Modal Approach & Analysis oVisualization oCases oAdmissibility
- 6. Use of computer graphics to accurately represent an oObject oEnvironment oProcess oData oEvent.
- 7. Big and Small objects
- 15. A Reconstructionis based on available physical evidence and can be used for analysis or for substantive purposes. A Recreation is mostly a demonstrative or “creative” work (although it may be based in part on physical data), it may rely on witness testimony or other non-physical sources of data.
- 16. A Reconstructionis based on available physical evidence and can be used for analysis or for substantive purposes. A Recreation is mostly a demonstrative or “creative” work (although it may be based in part on physical data), it may rely on witness testimony or other non-physical sources of data.
- 17. Measurement/Documentation Defines the equipment, technology and methods of capture Analysis Is the study of captured data and how it can be explored to reveal information that would otherwise be obscure Visualization Presentation and delivery of the documentation or analysis in a form that is easily understood
- 19. Types oBullet Trajectories oSuspect Height oBloodstains oComparison Analysis o3D Deviation Analysis oTime-distance relationships oAngular measurements oField of view
- 20. Types oPlan Drawings/Sketches oStill Images/Renders oAnimations oReal-Time Models oVirtual Tours/Panoramas oVirtual Environments o3D Prints
- 21. Photogrammetry oUses a digital camera to capture photographs from varying angles and creates a textured 3D model Handheld Scanners oSeveral companies are offering low cost scanners capable of documenting objects the size of a human body or larger Laser Scanning oUses active source of light energy to “bounce” off a surface and return to a receiver where distance is calculated.
- 23. 3D scanners are not so versatile that they can be used on all types of surfaces and in all conditions. Like any piece of equipment, there are applications for which they may not be well suited.
- 24. Dark surfaces absorb light and make it difficult to get a strong reading to the receiver.
- 34. Partial hits on a surface provide multiple returns that are difficult to discern from one another. The result on edges and sharp corners is noise
- 44. Retexture for better or alternate light spectra Photos are high resolution
- 51. Temperature may indicate time of death. May also indicate other evidence at a crime scene
- 56. Use total station as a control to position scans Use laser scanner on evidence that requires greater detail
- 58. Video records over time Positions and changes are able to be documented accurately
- 61. Use photogrammetry in hard to reach areas or in places where higher accuracy is required Photogrammetry & Laser Scanner
- 67. Use to fill in gaps where scanner cannot reach Handheld & Laser Scanner
- 68. New Uses for Handheld Devices
- 69. Fill In Gaps
- 70. Use to compare changes in point clouds over time Point Cloud Comparison
- 75. Visualization
- 76. Plan Drawings
- 77. 3D Renders
- 78. Animations
- 79. Virtual Models
- 80. 3D Prints
- 81. Webshare2Go
- 83. Cases
- 110. How are you using the data? oDetailed Analysis oVisualization oPlan Drawing Accuracy -Always have reference measurements! Training and Certification There are no known cases where laser scanner data has been inadmissible FARO scanner data has been accepted at trial on many occasions IAFSM is looking to develop laser scanning guidelines
- 111. Scanner data has been used and demonstrated at trial! State of Indiana vs. David R. Camm, 74C01-1210-MR-000184 Spencer Country Circuit Court, Indiana, USA Judge Name: Johnathan Dartt September-October 2013 Expert Witness: Eugene Liscio State of Georgia vs Anthony Johnathan Donald, Criminal Case Number: 13903669 –42 Clerk Superior Court –Cobb County Georgia: Rebecca Keaton Judge Name: Grubbs August 2014 Expert Witness: David Dustin
- 113. Thank You! Eugene Liscioeliscio@ai2-3d.comwww.ai2-3d.com