With a Camera Determine Who Caused a Collision
A New Blog Series We introduce a new blog series called “With A Camera“. With each blog post in this new series we describe an application of close range photogrammetry – that is, 3D measurement and modeling with a camera. The articles will describe significant real-world problems and how photogrammetry was able to uniquely solve […]
Tip 85: Measuring suspect height using a single photo from an unknown camera
Surveillance cameras are ubiquitous in public places. Crimes and/or the suspects participating in them are often captured on one or more of these cameras. Measuring the height of a suspect in a scene is usually a key piece of evidence in identifying the individual. PhotoModeler can be used to accurately measure the height of a […]
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 […]
Tip 62: Forensic Modeling of Trajectories with Photogrammetry
A common forensic task is to determine the position of a shooter in a crime scene. One technique uses bullet trajectory rods and calculations of intersection and extension. Photogrammetry, the science of performing measurements from photos, can be used to model the cylindrical trajectory rods, using a normal DSLR camera, and find their position and […]
Photogrammetry helps police clear accident scenes quickly and safely
Car accidents are an ordeal for everyone. They’re traumatic for the people involved, of course, but they also affect everyone else on the road. The more serious the incident, the more likely that multiple lanes will be blocked, and the longer it will take to get it cleared. The police officers at the scene have […]