NEW Sentry Scope 21 Mega Pixel CCTV Camera For Installation In London, Kent & The South East
A new 21 mega-pixel CCTV camera that is being installed in London and across the UK is SentryScope.
SentryScope is capable of capturing up to 21 million pixels per image. It uses advanced line scanning technology to achieve the highest level of resolution. At any one point in time, only a narrow vertical line in the monitored region is being viewed. This vertical line is comprised of 2,048 pixels. A precision optical scanner sweeps this line horizontally across the field of view 10240 times to obtain a full image in about one second.
The ultra high resolution CCTV digital camera with a 90° angle of view enables facial recognition playback in an area of 90m wide and 60m away!
How does this differ from conventional CCTV?
Conventional CCTV products capture an entire image (640 x 480 pixels) in 1/25th of a second. Alternatively, the odd scan lines are captured in 1/60th of a second, followed by the even numbered scan lines in the next 1/60th of a second. This mode of operation is called interlaced video.
How large of a field of view can SentryScope monitor?
SentryScope can identify people up to 60m from the camera (field of view 120m wide). License plates can be read up to 40m feet from the camera (field of view 80m wide).
DEMONSTRATION
In the picture below the person and license plate were approximately 150 feet from the camera.
What is the aspect ratio for SentryScope?
One of the limitations with today’s CCTV solutions is a fixed aspect ratio of 4:3. Many viewed areas are much wider than high and don’t fit neatly into this ratio. Using one conventional CCTV camera to view a large region will result in poor resolution and non-essential areas being monitored. Multiple cameras and automatic panning features result in increased installation and maintenance expense along with sub-regions going periodically unmonitored. With SentryScope, all of these design issues go away. The vertical field of view is adjustable by the focal length of the lens used. SentryScope has a choice of either a 50mm or 85mm lens providing 30° and 18° vertical field of views respectively. The horizontal field of view is adjustable by the user from 36° up to 90° maximum. This allows SentryScope to be adjusted to match the monitored field reducing the number of cameras required and eliminating duplicate images and non-essential areas from being recorded.
What is the image rate for SentryScope?
SentryScope captures an entire image in approximately 1.5 seconds, depending on the adjusted width of the horizontal field of view and the lens.
Is motion blur a problem?
Correct positioning of the camera should eliminate any motion blur problems. Vehicles moving en excess of 25km per hour across the face of the camera will appear distorted.
Why is SentryScope black and white?
With colour, resolution is decreased by factor of three from dividing the pixels between the red, green, and blue channels. Colour is critical in fully-manned applications where it helps improve the performance of personnel continually monitoring displays. SentryScope is designed for partially and unmanned operations where achieving the highest level of resolution is more important than colour. We are working on a 'Best of Both Worlds' solution.
What zoom capabilities are available with SentryScope?
Because SentryScope has such high resolution, the monitored area can be very large and still capture enough pixels to allow zooming into sub-regions with fine detail in recorded video. Using a sophisticated PC software package, SentryWare™, images are displayed in real time and stored for later review. Point and click features allow the operator to zoom in on a sub-region and pick out fine details such as vehicle license plates, identifying marks on people, or suspicious activity taking place. Advanced image enhancement techniques, such as adaptive contrast and sharpening, can be applied to further enhance the zoomed image.
With all those pixels, won’t storage become a problem?
In order for SentryScope to capture up to 21 million pixels per image, transmit the data to a PC, display the images in real time, and store the images for later review, it has been designed from the ground up using advanced digital technology. SentryScope builds the image from the vertical scan lines, compresses and security encodes the image data, sends the image data over a dedicated Fast Ethernet connection to a PC running SentryWare, displays the data, and stores the data (typically on a hard disk). Advanced compression algorithms can be applied allowing up to 14 days of continuous image storage on a 1 Terabyte hard disk drive.
