U.S. flag
      An official website of the United States government, Department of Justice.
        Here's how you know
      Here's how you know**Official websites use .gov**
            
            A **.gov** website belongs to an official government organization in the United States.
      **Secure .gov websites use HTTPS**
            
            A **lock** (
            A locked padlock
            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites. Menu

      
        close

            
            
                                              About NIJ
        
                    
  
          About NIJ
      
    
          The NIJ Director
          How NIJ Is Organized
          Mission and Guiding Principles
          Research and Development Process
          Strategic Framework
          Assessments of NIJ
          Annual Reports & Reports to Congress
          Staff Directory
          Funding & Awards
        
                    
  
          Funding & Awards
      
    
          Current Funding
          Forthcoming Funding
          Expired Funding
          Awards: Listing of Funded Projects
          Guidance for Applicants and Awardees
          Fellowship & Student Programs
          Travel Scholarships
          NIJ Challenge Program
          Library & Multimedia
        
                    
  
          Library & Multimedia
      
    
          NIJ Journal
          Podcasts
          Publications Listing
          Multimedia Listing
          Rated Practices on CrimeSolutions
          Rated Programs on CrimeSolutions
          Software & Databases
          Datasets
          Patents
          Topics
        
                    
  
          Topics
      
    
          Article Listing
          Corrections
          Courts
          Crime Prevention
          Crimes
          Drugs and Crime
          Equipment and Technology
          Forensic Sciences
          Youth Justice
          Justice System Reform
          Law Enforcement
          Tribal Crime and Justice
          Victims of Crime
          Events
        
                    
  
          Events
      
    
          NIJ 2024 Research Conference
          Scheduled Events
          On-Demand Events
          Research Meetings & Workshops
          NIJ-Hosted Online Training

                            
                                About
          Contact Us
          Subscribe
          Topics A-Z
                  Share
FacebookXLinkedInRedditPinterestEmail Home
                            Events
 Portable Advanced 3D Imaging for Footwear and Tire Impression Capture Event Dates
              October 23, 2019, 2:00 pm
 – 3:30 pm
Event Duration
              90 minutes
Location
              Online

Register

This webinar will explain the principles and capabilities of a fully automated portable system with an easy-to use-graphical user interface (GUI) for shoe and tire impression capture. We have four prototype systems ready to be evaluated by interested examiners or practitioners, providing opportunities for users to interact with the system and provide feedback to further improve the technology.

The entire hardware system includes a digital complementary metal-oxide semiconductor (CMOS) camera, a digital-light-processing (DLP) projector, and a laptop computer. The 3D scanning system is being developed in Professor Song Zhang’s laboratory at Purdue University. The system is calibrated during initial assembly and simply needs to be plugged into an outlet and a laptop via a USB3.0 port for immediate data capture. The camera and the projector are precisely synchronized to allow a sequence of defocused binary structured light patterns to be captured by the camera. The captured images are processed to create a 3D surface map at camera-pixel spatial resolution, and simultaneously record a color image (or texture) that is 100% aligned with the 3D surface using the same camera. The image acquisition takes a fraction of a second, and the automated 3D reconstruction takes a few seconds. 3D data can be immediately visualized on the screen for monitoring capture quality or saved to digital storage media in standard 3D mesh formats (e.g., OBJ, STL, PLY).

The graphical user interface (GUI) includes the camera control, visualization, and data handling modules. The entire GUI was developed with Qt, C++, OpengGL, and OpengCV by Professor Song Zhang’s team with the special emphasis on making the GUI intuitive and easy to use. The camera control module allows a user to manually or automatically adjust camera exposure, and then click a button for 3D image acquisition.  The visualization module enables the user to examine the quality of data in both 2D and 3D. This module allows the 3D data manipulation such as zoom-in and zoom-out, rotation, and translation, as well as different visualization mode selections such as shaded, textured, wired or different depth colorization. The data handling module offers data reading and writing, as well as screenshot creation.

The prototype system was designed to capture an area of approximately 14”x10” with a spatial resolution of approximately 137 ppi (pixels per inch).  Our team has conducted two workshops, one at 2018 IPTES (Alexandria, Virginia) and the second one at the 2018 IAI Annual conference (San Antonio, Texas). The system has been extensively tested by our team, the workshop participants, a team of forensic examiners from Omaha Police Department, as well as some volunteers. We have received extremely positive comments on the performance and usability of the system from workshop participants and other evaluators.

**Detailed Learning Objectives:**

– Familiarize with one advanced 3D imaging instrument specifically for tire and shoe impression capture
– Familiarize with the principle behind such an advanced 3D imaging technology
– Learn how to use such an advanced imaging technology for evidence collection
View Full Course Page
  
  
          Details
Event Type
              Webinar
    Event Option(s)
          Online,
                        On demand

Sponsor(s) / Host(s)

National Institute of Justice (NIJ), U.S. Department of Justice;Forensic Technology Center of Excellence
    Contact
          NIJ Forensic Science Technology Center of Excellence

  Link
              If you have questions about this course, contact the FTCoE

  Registration Dates
              September 23, 2019 - October 23, 2019

  Registration Status
              Open

  Cost
              $0

  Eligibility
              Open to all
    
  
Read more about
    
            Forensic sciences
        Impression, Pattern and Trace Evidence Symposium (IPTES)
        Evidence collection
        Forensic examiners
        Trace evidence
        Crime Scene
        Shoe prints and tire tracks
        Forensic Technology Center of Excellence
        Pattern evidence
  
Date Created: September 23, 2019
    
          Side navigation
  

        

  
  
              NIJ 2024 Research Conference
    
      
            
            
            
      Scheduled Events
    
      
            
            
            
      On-Demand Events
    
      
            
            
            
      Research Meetings & Workshops
    
      
            
            
            
      NIJ-Hosted Online TrainingSimilar Events
        
                      DEIA: What I learned from the AAFS Diversity Outreach Committee
                  FBI Laboratory Decision Analysis Studies in Pattern Evidence Examinations
                  Discovery, Disclosure and Ethical Considerations
 Top

      National Institute of Justice

        
        
                        About NIJ
                    About NIJ
      
    
                  How NIJ Is Organized
      
    
                  NIJ Director
      
    
                  Research Disclaimer
      
    
                  Funding & Awards
                    Funding & Awards Home
      
    
                  Awards Listing
      
    
                  Current Funding
      
    
                  Guidance for Applicants and Awardees
      
    
                  Resources
                    Events
      
    
                  Podcasts
      
    
                  Publications
      
    
                  Topics
      
    
                  Multimedia
      
    
                  Reuse Policy
      
    
                  Contacts
                    Contact NIJ
      
    
                  Staff Directory
      
    
                  Submit a FOIA Request
      
    
                  File a Civil Rights ComplaintFacebook
          
                      X
          
                      YouTube
  

      810 7th St. NW, Washington, D.C. 20531
      
              Secondary Footer link menu
            Accessibility
              Plain Language
              Privacy Policy
              Legal Policies and Disclaimer
              No FEAR Act
              Freedom of Information Act
              USA.gov
              Justice.gov