Category Archives for "Police / Forensics"

Photogrammetry and Car Crashes

Depicts two cars post accident.

Among photogrammetry’s many useful applications is in the area of car crashes, specifically the reconstruction of car crashes after on-site evidence has been removed. The ability of photogrammetry to remake car accident scenes is tremendously important to the police and forensic specialists who investigate the aftermath of these kinds of events. This is because car […]

New Method for Measuring Movement in Security and Surveillance Video

Security Camera

When you have a sequence of images containing data/evidence spread over several frames recorded from the same position, for example, a series of frames from a fixed security camera, you can use PhotoModeler’s image sequence feature to measure or track objects in the scene over time! Here are some possible uses: Calculating and comparing the […]

Using Photogrammetry in Court

Court Room Gavel

This is a guest article by forensics consultant, and trainer, Dan Mills. Bio below. Anyone in a technical field that brings evidence to court must consider both the evidence they are presenting, as well as the admissibility of their methods. First, a definition of Admissible Evidence: Evidence that is formally presented before the trier of […]

Forensic Photogrammetry: A Case Study

Forensic Playground photo repaired

This is a guest article by forensic imaging consultant Mike Mayda. Bio below. Why Use Photogrammetry in Forensics? Photogrammetry can be a very powerful tool in forensic analysis. It is often useful to have an accurate 3D reconstruction of an accident or crime scene, especially in cases where position, distance and perspective are important. Given […]

Using a Dropcam for Forensics and 3D Measurement

The Dropcam security camera is one of several easy-to-use IP cameras on the market for self-monitoring security systems. This article describes a forensic simulation using Dropcam imagery, and the 3D-from-photos software, PhotoModeler. PhotoModeler is the most comprehensive solution, at any price, for working with images from a variety of sources to produce accurate 3D measurements […]