Forensic Services

CCTV Editing & Enhancement

Video Management Services have invested heavily in specialist
video editing equipment and skills necessary to serve the demanding
requirement for processing recorded CCTV images into
evidence that is fit for purpose.

The video processing software employed by VMS is used extensively
by police and law enforcement agencies throughout the
UK enabling analysts to extract and optimise raw images into
credible evidence for submission in court.

The VMS CCTV forensic editing service is provided on an individual project basis or as a negotiated annual contract if appropriate.

Individual projects are subject to the VMS Forensic Service Agreement; this is supplied in a
package including project documentation and secure evidence transit packaging.

On receipt of; the images (normally on CD, DVD or Video Tape), completed documentation
and preliminary analysis fee of £128 + VAT we will review the project and quote a fixed fee for
processing. Any attendance as Expert Witness will be charged at current day rates plus expenses.

The VMS CCTV forensic editing service capabilities include the ability to capture, process and
output de-multiplexed, uncompressed video images that can track highlighted subjects of surveillance or electronically mask unconnected individuals.

Often CCTV images are badly compromised by a lack of lighting, excessive sunlight, artificial
lighting interference, subject movement etc. What appears to be totally useless as evidence can
often be corrected by application of the following techniques;

Field Alignment

Moving objects can appear to be blurred due to the picture being made up from two interlaced fields with a momentary time differential between these fields, this has the effect of images appearing at marginally differing locations. Realignment will remove the apparent blurring, this technique can be particularly useful in recognising vehicle number plates.

Colour Correction

Adjustment to colour balance restores original colours that have been affected by unsuitable colour temperature of artificial lighting, ie., Sodium streetlights (yellow) some colours of fluorescent lamps.

Brightness & Contrast

Correction to brightness and contrast can be applied to enhance recoded images.

Highlighting

A highlight overlay that tracks the subject has the effect of suppressing any unconnected distractions within the picture.

Masking

Masking (pixilation) is applied to recognisable or identifiable images of unconnected third parties in evidence sequences and in the case of Data Protection Act – Right of Subject of Access Applications.

Image Equalisation

Equalisation is a method of enhancing images that are not clearly visible due to extreme lighting conditions.

Interference Reduction

Averaging is a method of using multiple frames to eliminate electronic noise or random environmental factors such as snowfall or rain.

Picture Alignment

Correct the alignment of images from cameras that may have been incorrectly set up or knocked out of alignment to the horizontal plane.

Storyboard & text

A sequence of events (storyboard) can be produced from raw footage by joining related images into a single video sequence with descriptive text. Evidence presented as a logical progression is more readily understood by the viewer. This is particularly important if a third party is making judgement without representation by the organisation or individual submitting the evidence present.

Image Framing

A coloured frame in the form of a rectangle or ellipse etc., can be used to differentiate between individuals i.e.  Mr Smith (Red)  Mr Jones (Blue)

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