Photo-Based Crash Reconstruction: Derive Speed, Distance, Time, ΔV & Impact Zones from Any Image
When our experts examined the crush damage on this vehicle, the calculated impact speed (Equivalent Energy Speed) was about 32–33 mph (52–53 km/h). In simple terms, that’s how fast a typical sedan would need to hit a solid barrier to create the same damage. From this, we also estimate the delta-V—the sudden change in speed the occupants experienced. Delta-V is one of the most reliable indicators of crash severity and injury potential. In this case, the delta-V was approximately 32 mph in a barrier-type impact, or 16–17 mph if another car of similar size was struck.
Why does this matter? Higher delta-V values often mean greater injury risk, leading to higher medical costs, longer recovery, and potentially larger insurance payouts. For many moderate-severity crashes like this, settlements can reach tens of thousands of dollars, depending on injuries and circumstances.
Extract Crash Metrics & Reconstruct Scenes from Photos
We calculate speed, distance, time, ΔV, impact zone, and more from just a few images.
Old, blurry, or low-res—our forensic photogrammetry and crash animations deliver precise, court-ready metrics.
Key Service Highlights
High-accuracy crash metrics from images, synchronized with EDR data and delivered as court-ready visuals.
Image-Based Crash Metrics
We compute speed, ΔV, and acceleration profiles using single- and multi-view photogrammetry with documented uncertainty.
- Camera calibration & lens distortion correction
- Scale set from lane widths, signs, or on-scene targets
- Uncertainty bands and assumptions stated in the report
Vehicle Placement & Positioning
Exact yaw, pitch/roll, and footprint location resolved from roadway reference points and pole/guardrail imprints.
- PDOF & impact-angle diagrams
- Geo-referenced layers for map exhibits
Photorealistic 3D Scene Reconstruction
True-scale 3D models, orthographic plans, and animation clips tailored for mediation and trial.
- Crush maps & cross-sections from photo overlays
- Simulation stills, timelines, and call-outs
Integrated EDR Visualization
We fuse image-derived metrics with Event Data Recorder (black-box) downloads for a unified, auditable chronology.
- Brake, throttle, speed, and ΔV aligned to imagery
- Pre-impact distance & time-to-collision estimates
Expert Witness Visuals & Crash Animation
High-impact demonstratives designed for judge/jury comprehension, with methods and sources clearly cited.
- Methodology summaries & chain-of-custody notes
- Exhibits exportable as images, PDFs, or short videos
Can we measure crush from photos if the vehicle is gone?
Yes. Using exemplar geometry or OEM specs, we overlay the “after-crash” outlines in CAD to measure cross-sectional crush. Applying published crush coefficients yields energy, ΔV, and speed ranges. When imagery is limited, EDR retrieval may still provide corroboration.
How We Do It
Court-ready workflow for extracting crash metrics from photos and videos.
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Image Acquisition & Enhancement
We correct perspective, lens distortion, and lighting; verify EXIF metadata; and apply super-resolution when appropriate.
What we check
- Camera angle/height, focal length, and shutter time
- Chain-of-custody and file integrity (hashes)
- Compression artifacts that can bias measurements
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Feature Extraction
We identify skid marks, crush zones, vehicle reference points, and pole/guardrail imprints using photogrammetry.
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Scaling & Calibration
We set scale using known dimensions (lane widths, signs, curb stones) or on-scene control points/targets for higher accuracy.
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Crush Energy Analysis
We apply the 6-point crush methodology to estimate ΔV and impact speed, reporting uncertainty bands.
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Path & Angle Determination
We resolve approach and departure vectors, principal direction of force (PDOF), and impact angles from geometry.
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Time & Distance Calculations
We compute braking and travel distances using timestamps, shadow analysis, roadway grade, and friction/drag factors.
Frequently Asked Questions
1. How can images of any age provide accurate crash metrics?
We use photogrammetry to correct perspective and distortion—ensuring precise measurements regardless of image date.
2. What metrics can be derived from a single photo?
Speed, ΔV, impact angle, crush depth, vehicle orientation, and time-distance relationships when shadows or timestamps exist.
3. How do you calculate speed from still images?
By calibrating scale with known dimensions, extracting displacement vectors, and applying kinematic equations.
4. Can you model skid marks and crush zones from a photo?
Yes. We trace visible marks, align them in 3D, and use crush energy analysis for deformation-based estimates.
5. What is photogrammetry and how is it used?
Photogrammetry measures distances/angles from photos to triangulate 3D points—critical for scene reconstruction.
6. How accurate is photogrammetric analysis?
With multiple reference points and high-res images, results are within a few percent of true values—court-ready.
7. How do you establish scale in images with no known reference?
We use vehicle specs, road marking standards, or public records to reliably set scale.
8. What is ΔV and how is it calculated?
ΔV is the velocity change during impact. We derive it from crush energy, correlating deformation to velocity change.
9. How do you determine vehicle position and orientation?
By matching image features to 3D coordinates and using spatial algorithms for yaw, pitch, and roll angles.
10. Can your 3D models be used for courtroom animations?
Absolutely. Our forensic animations and crash reconstructions are optimized for trial presentations.
11. How long does a full image-based reconstruction take?
Typically 3–7 business days, depending on complexity and data availability.
12. What level of detail can the 3D models achieve?
We model textures, lighting, and structures to sub-centimeter precision for expert witness visuals.
13. Can you enhance low-resolution or blurry images?
Yes. We apply denoising, super-resolution, and contrast adjustment to maximize usable detail.
14. How do you integrate EDR data with image analysis?
We sync EDR timestamps and speed/event flags with photogrammetric metrics to validate reconstructions.
15. Which industries benefit most from these services?
Attorneys, insurance companies, law enforcement, government safety boards, accident victims, and investigators.