Digital Readers Developed for London Underground
Security Park
Source
The terrorist attacks on the London Underground recently has tested the capabilities of CCTV systems that are commonplace in the underground stations but which are in limited use on the trains.
Following the attacks on 7 July, Alstom Transport, the management company responsible for the supply and maintenance of trains on the Northern Line, instructed Falcon Protec to supply CCTV review workstations that enable the digital video recordings acquired from the Falcon Protec on train digital recorder to be copied and analysed.
During 2004, Wavelet Technology responded to a request from Falcon Protec to report on such a workstation, when a feasibility programme was undertaken and the study presented shortly afterwards. The now urgent requirement demanded the completion of the system development with the realisation of a fully functional product immediately.
On the 8 July, Wavelet Technology were commissioned to produce the digital review product to analyse the data from the trains' digital recorders and immediately established a fast track development programme assigning, software and hardware teams to perform the multiple tasks required for this crucial work.
The data and storage system of the recorder was successfully recognised to allow the copying of several recorders onto a single large back-up hard drive. Although each contains 72 hours of CCTV recording, the entire video files were copied in just 18 minutes. The original recorders were then to be installed back onto the trains for continued service.
Further development by Wavelet Technology allowed the recordings to be analysed by the Wavestore Review software that can then be used to review the back-up disk's archive of up to 120 cameras, from several days of recordings, instantly.
With the fastest access to the recordings, users can go back into archive by simple time and date entry or by dragging the unique 'waterfall' recordings display for each and every camera. Snapshots can be exported into JPEG, PNG, BMP format or printed out directly onto a printer. Selected video clips from multiple cameras can be further copied onto CD-R or DVD-R for playback and review on any PC.
The Wavelet Technology decoding software, Waveplayer, can be included onto the disks if required. Image by image analysis can be performed with image enhancement tools available to improve pictures that may be recorded in challenging environments. Further tools are available to allow for the intelligent searching of motion in selected areas on multiple cameras. The attempted attacks in London on the 21 prompted the immediate deployment of Wavelet Technology's prototype review workstation and the Police were able to quickly identify a suspect from the Oval station train and release an image to the media immediately afterwards.
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