Photogrammetry and Analysis of Digital Media
Please note, this course is scheduled to end at 2:00 p.m. on Day 3 to allow attendees to make afternoon flights.
This course has been approved by the Accreditation Commission for Traffic Accident Reconstruction (ACTAR) for 21 Continuing Education Units (CEUs). Upon completion of this seminar, accredited reconstructionists should mail a copy of their course certificate and the $5 student CEU fee to ACTAR, PO Box 1493, North Platte, NE 69103.
What Will You Learn
- Remove lens distortion from photographs and video
- Utilize the latest techniques in photogrammetry software
- Accurately locate roadway evidence using photogrammetry
- Determine crush measurements from photogrammetry
- Create photogrammetry-based point clouds
- Analyze video footage for object positioning and timing
- Effectively present your findings in court
Is This Course For You
Materials Provided
Course Requirements
Topics
- Overview of Photogrammetry
- Use in Accident Reconstruction
- Police use at accident sites
- Locating scene evidence - no longer physically visible
- Determining vehicle damage - from photographs alone
- Photo scanning - scene and vehicles
- Image projection (visualization, texturing, striation analysis)
- Video analysis (speed, positions)
- Video tracking and motion capture
- Crash test documentation and analysis
- Visualization - 3D animation (Orienting viewer)
- Types and Methods of Photogrammetry
- Aerial / Oblique
- Close-range
- Stereo-Photogrammetry
- Analogue (Grid)
- Structure from Motion (SFM)
- Software Packages
- Hands-on Workshop: Eyeball Photogrammetry Method - Scene Diagram
- Review available photographs, aerial resources, and photo analysis
- Hands-on Workshop: Photo Rectification (Grid Photogrammetry)
- Known distance for scale, photo divisions (grid), diagram with evidence placements, compare results
- Photogrammetry: Formal Methods - Scene
- Review available photographs, lens distortion removal, effects on accident reconstruction, EXIF data, software
- Hands-on Workshop: Lens Distortion Removal - library based, manual, straight line and point cloud methods
- On-site Photogrammetry
- Plot out police matrix on site - inform inspection
- Hands-on workshop: reverse camera projection - photo grid for reference and line of sight methods
- Camera Matching Photogrammetry (Scene)
- Hands-on workshop: 3D Studio Max (Autodesk) - photograph analysis; lens distortion removal; import: scan data/survey, photographs; solve for three virtual cameras; results/comparison
- PFTrack - import: scan data/survey; photograph; solve for camera location; results/comparison
- Video Analysis
- Video tracking - static and moving camera
- Speed analysis - 2D planar tracking; landmark, line-of-sight analysis
- Photogrammetry: Formal Methods - Vehicle
- Hands on workshop: PhotoModeler - photograph analysis; lens distortion removal; import photographs; process recognizable features; obtain accurate 3D models or scan data; output, and align; compare results
- Camera matching photogrammetry
- Photogrammetry: Alternative Methods
- Target based photogrammetry (Rhino Photo)
- Hands-on workshop: photo scanning (VisualSFM) - coverage, scale; photograph vehicle; process in VisualSFM; align to 3D model for comparison; accident scene example
- Photogrammetric Technology Applications
- Image projection - nighttime visibility; texturing (camera projections); striation analysis
- Admissibility
- Range of uncertainty determination
- References
- Day 3 is scheduled to end at approximately 2 p.m.