Cameras have become ubiquitous in our environment; we are never too far away from a video-capturing device. Closed-circuit television, better known by its abbreviation CCTV, is the use of video cameras to transmit a signal to a monitor in a specific place. These video recordings capture events and the actions of individuals, providing useful evidence for use in a criminal investigation or civil suit.
Besides the use of cameras for video surveillance, it is also common to find in-car cameras (or dashcams) installed in vehicles. In the event of a traffic collision, the captured video recording from the involved parties and nearby vehicles can be analysed for insurance purposes or criminal investigations.
Video analysis can be performed on recovered recording to answer the questions of “Who”, “What” “When”, “Where” and “How” in order to reconstruct an event. Our experts have the relevant domain knowledge, expertise and equipment to review the recording to assist you with the following:
• Frame-by-frame analysis,
• Sift out the details in the recording,
• Compare objects in different videos, or compare them with objects to determine similarity, differences or alterations,
• Perform speed calculations to ascertain whether a vehicle was travelling below or above the road speed limit,
• Reconstruct incidents to understand the events preceding, during and after an incident,
• Present the findings and opinions clearly and effectively in an expert report that is admissible in the courts, and
• Provide expert testimony on the forensic findings and conclusions.
The imaging work falls into four main categories:
1. Image Improvement - This includes demultiplexing, noise removal, image optimisation, frame stabilisation and frame averaging.
2. Enlargement, slowing down ‘fast moving’ footage and the use of lighting filters might be all that is required.
3. Identification of People or Objects - Comparing photographs of known suspects or objects with images in the evidence. Often called ‘facial mapping’.
4. Analysis of Events - A sequence of actions or activities is analysed and reported to identify who did what.