STARLIGHT CAMERAS

Starlight Cameras, and Color Slow Speed Shutter Camera

We offer starlight cameras, color slow speed shutter cameras, lowlight cameras, and other specialized equipment.

The Starlight camera is 30x more sensitive to light than standard low-light cameras. Lux .0003. Res:570 lines

Infrared light source works with infrared cameras to see in total darkness.

Below are a series of images that compare starlight cameras, color slow speed shutter cameras with lowlight cameras, and also the failure of standard video surveillance cameras to see an image adequately in dark and no-light locations. All video captures were taken at night.

Here are some images that show the abilities of the starlight cameras, color slow speed shutter cameras, vs lowlight cameras, and also the inability of normal video surveillance cameras in the dark and lowlight applications.

www.truvision.co.uk 

Lowlight Cameras VS. Starlight Cameras
		Here you can see the difference between a normal surveillance camera and astarlight camera at night.
		The picture on the left is showing a four camera system with one of the cameras as a starlight camera. The picture on the right is from a starlight camera with no artificial lighting in immediate area.
		These two pictures show what the the starlight cameras are capable of. Notice that the lights are out in both pictures.
		The picture on the left is taken without moonlight. On the right the picture taken with the illumination of the moon.
Color Slow Speed Shutter Cameras - Excellent for terrestrial viewing.

CIF vs D1

CIF and D1 represent different resolution standards in DVRs (Digital Video Recorders - they record analog cameras).

CIF DVRs have a 360 x 240 pixel resolution.

D1 DVRs have a 720 x 480 pixel resolution.

This means that D1 is roughly four the image quality level of CIF.Image quality can be very important and can be the difference between getting a blurry representation of someone and knowing exactly who it was. 

Our Econ line of DVRs record in CIF, while our Standard line records in D1.

CIF and D1 sample VIdeos

Make sure you click the white "four arrows" button near the SCW logo to see these videos in their proper resolution.

CIF Resolution
D1 Resolution

In case you didn't want to watch those video, here's an image from them.

CIF	D1

Why CIF and D1 aren't the only things that matter

Better Image Quality Does Not Always Mean Better Video Quality

Video Quality is dependent upon two things: image resolution and frames per second. Resolution improves image quality (which is why the videos above show a color swatch that doesn't move) while frame-rate improves video quality by preventing motion blur.

When purchasing a DVR it is always very important to also check the frame rate.Make sure it can record at 30 Frames Per Second (which is known as "realtime recording.")

Part of our 100% Satisfaction Guarantee is that All of our DVRs record at 30 FPS.

Buyer Beware: Some companies sell inferior "D1 DVRs"

Each DVR has a recording resolution and a live video resolution. D1 is currently the highest analog resolution used for both recording and live viewing, but many standalone DVRs are not able to record in D1 in realtime, which is 30 frames per second (fps). Because significant processing power is needed to record these high resolution images and it that much power wasn't available or economical then, D1 originally was not able to offer the same number of frames per second as CIF.

Nowadays with computing power being what it is, D1 DVRs can record at full 30 fps frame rates. However, some competitors obscure their frame rate by saying things like "FPS is 60" which makes their frame rate sound higher, however they often mean by that is "The Total FPS of all the cameras combined is 60." For example, if Total FPS is 60 than the frame rate is 15 per camera if there are 4 channels, or 7.5 FPS if there are 8 cameras.

Most people are unable to tell the difference between 30 FPS and above, so you don't have to go too much higher than 30 FPS, however, below 30 FPS can cause the video to be so "jerky" as to be unwatchable.

CIF and D1 aren't the only options

Nowadays, there are actually 4 resolution options for CCTV recording, but most DVRs can only handle CIF or D1. If you want HD recording, you will need to switch from analog cameras and a DVR to IP cameras (cameras with Internal Processors and which connect to a network and have IP addresses) and an NVR (Network Video Recorders - they record IP cameras).

IP cameras can record in 720p or 1080p (and also D1 and CIF).

Click here for a page similar to this one that compares 720p and 1080p resolution

The image below shows the relative size difference in image size (while keeping the pixel size constant) for CIF, D1, 720p, and 1080p. Each size increase is about 4 times as many pixels as the one before it. 

Note: your resolution won't prevent you from capturing a wide angle view, so you will be able to get a wide or narrow shot with any recording resolution. So, for example, you could record the whole scene below in CIF resolution, however, since it would only have as many pixels as are represented in the CIF area (360 x 240), it would be blurry.

 

How to decide if you need a CIF or D1 DVR

When purchasing a DVR, you should ask yourself if you need the higher resolution. If you do, you should ask if you need the frame rate to also stay at Full 30 FPS recording. Here's a flowchart of the CIF vs D1 decision making process, and here are some links to

CIF DVRs

D1 DVRs

Full D1 DVRs

www.truvision.co.uk

What is the best cabling for CCTV?

Tips for Installing CCTV Cameras with Long CCTV Cable Run

When you are installing a CCTV system in an office, house or small warehouse, it is usually quite easy to run the cabling. The cable will not often have to go very far, so you can use a standard CCTV cable and the video signal will be clear and sharp.

Tips for Installing CCTV Cameras with Long CCTV Cable Run

However, there are some situations where it might be more difficult to install CCTV. In a large building, factory, village, house compound or other large area, installing the cameras and the cabling will bring another set of challenges. You will need a lot more cabling and a much more well thought out approach in order to set up the cameras correctly.

What is the right approach for installing a CCTV system which will require a long cable run? There are a few things that you should keep in mind as you proceed.

Plan Ahead

Because you will be installing such a large system with a lot of cable length, you will need to make a plan for where your cables will go. First of all, get your hands on an area map or a floor plan of the building so that you can get a view of what you have to work with. You can look for the electrical room as well as already existing electrical pipes which are being used for other purposes such as radio equipment.

With this information, you can compute the distance and determine the best path for the cable to run along. Make a plan for how you will install the cable so that you know exactly what you are doing.

Choosing the Right Cable

When you are selecting the type of cable to use for the project, you should be using the highest quality cable available so that it will be strong enough to last for a long time. Make sure that the cable you choose matches the environment, such as whether the installation is indoors or outdoors.

It you find that the cable must be continuously flexed during use, such as when it is being used to connect pan & tilt cameras or scanners, then you should select a cable with a stranded wire core which will be able to withstand this movement. Cable which contains pure copper stranding is the best choice, as cable with stranding made from copper-plated steel will not effectively transmit in the CCTV frequency range.

If your CCTV installation requires a cable run of more than 800 ft, it is best to use RG6/U as this as a large-diameter center conductor and can deliver a signal further than other types of cable. If the installation requires a cable run of more than 1,500 feet, you might want to use RG11/U which is even larger and can transmit even further. However, keep in mind that it is heavy and difficult to install so will require a lot more work.

One of the best cables to use for long cable run are CAT5 cables, because they are more cost effective over long distances than coax cables and therefore will save you money. CAT5 cables are also much better at transmitting energy as well as video, so that the security cameras can be powered from long distances.

Another advantage is that the CAT5 cables have eight separate wires inside of them, so they are capable of supporting four channels at a time. You will also need Video Baluns, which are necessary for running your CAT5 cables over longer distances.

These are just a few important tips to keep in mind when you are installing CCTV cameras which have a Long Cable Run.

www.truvision.co.uk

Choosing The Right DVR?

Until 2009 you could simply evaluate the recognition standard of a CCTV system based on what percentage of the screen a person filled (see previous section). But with the latest standard from the Home Office things are slightly more complicated. These percentages are based on the PAL televisions standard which was used for most systems. Now, however, there are a number of recording resolution formats available and the above sizes depend upon the quality of each format. The following table based on the Home Office Operational Requirements Manual for CCTV – page 10 outlines some of the most popular formats.

So if you are using the PAL system and wish to Identify an Unknown Person they need to be 100% of screen height and to Recognise a Known Person then must be a minimum of 50% of the height of the screen etc. However if you have a recorder that produces pictures in 4CIF or D1, because the resolution is better than PAL to Identify An Unknown Person they only need to be 70% of screen height and to Recognise a Known Person they must be a minimum of 35% of the height of the screen.

The problem comes if you purchase a unit that only records in 2CIF or CIF. Now a person has to be 70% height of screen before they are recognisable and it is almost impossible to meet the Identify standard as they have to fill 139% of the screen. This also means that the area you can cover if attempting to recognise a person drops from a screen width (the width of the area viewed on the screen at the point that the target person is standing) drops from 4.5m to 3.2m.

The Home Office Operational Requirements Manual for CCTV – page 14 also states that while recording one picture per second per camera is adequate where there is little activity, 6 to 12 pictures per second per camera should be recorded where there is busy activity such as doorways.

We recommend that you purchase a Digital Video Recorder that can record in D1/C4 format at 6 pictures per second for the length of time you wish to keep the recordings.

www.truvision.co.uk

CCTV Resolution Explained.

CCTV Resolution can be very confusing because there are several different applications of it. In this article you will find our best attempt to explain the differences in as much of a non-technical manner as possible.

First to identify a few terms to help guide us. With the advent of high definition TV a new term has developed referring to the old TV format has standard definition. That terminology has seemed to creep into video security as well. A camera could be referred to has standard definition which basically means it is not a megapixel camera. However a camera may be called a High Resolution camera but it is still a standard definition camera. Now an analog camera or IP camera for that matter could be 380 TV lines of resolution and it would be called a low res camera. However, a camera with 540 TV lines would be called a high res camera. However they could both be considered standard definition cameras because they are not megapixel cameras or HDTV cameras. We will explain more about megapixel and IP in a moment.

CCTV Resolution...continued

In CCTV Video Security Systems the main differences of CCTV resolution are capture, display and storage resolution.

Capture or Camera resolutions for analog cameras

When reading a security camera specification sheet, you will see two sets of numbers rating the sensor of the camera. One lists the number of pixels (768 H X 494 V) for the sensor and the other rates the horizontal resolution (TVL) of the camera.

Effective pixels = 768 (Horizontal) X 494 (Vertical) Horizontal resolution = 540 TV lines

The difference between the two is pixel aspect ratio and picture aspect ratio. The pixel aspect ratio has to do with the actual number of pixels that sensor is able to capture. The picture aspect ratio is based on what the NTSC standard for analog signals (composite video) has been designed to process. The numbers are different but using the math behind it you can calculate how the two relate. We will avoid the math for this discussion.

Since analog standard definition security cameras do not have square pixels there are two types of picture aspect ratio. There is storage aspect ratio and display aspect ratio.

Storage Aspect Ratio

The storage aspect ratio is the digital size of the image as it is stored on digital media. For instance the highest stored resolution using composite video (which is what comes from an analog camera) is 720x480. That is the same as a standard definition DVD movie.

When storing video on an analog security DVR you have several resolution options. The typical settings available for storage are CIF, 2CIF and 4CIF.

CIF	352 x 240
2CIF	704 x 240
4CIF	704 x 480

Display Aspect Ratio

The display aspect ratio can only be displayed as what is referred to as a 4:3 aspect ratio which is the NTSC standard. This limits the number of lines of data that can actually be displayed. This explains why a 768 horizontal sensor when displayed on a 4:3 aspect monitor will result in only 540 TV lines of resolution. (note: a standard definition movie on a dvd could be in 4:3 or 16:9 format but the pixel size would still be 720x480 for storage purposes.)

Newer standards for TV have introduced High Definition TV with an aspect ration of 16:9 which allows for a greater number of lines of resolution to be displayed. Newer technology of cameras are now able to capture higher resolutions which will now allow for storing and displaying these higher resolutions.

Standard Resolution IP Cameras

Standard resolution IP cameras can produce the same resolutions options as shown above for DVR storage and the video data can be stored on a HDD using any PC that the camera software is installed on. They can usually also do full D1 resolution which is 720 x 480. Standard resolution IP Cameras can also capture 30fps. Typically they are setup to run at lower resolutions and frame rates to help with bandwidth and storage of the data.

Megapixel resolution IP Cameras

Just a note about megapixel IP cameras. Megapixel cameras can capture video at much higher resolutions but are not necessarily the same as High Definition as in HDTV. HDTV has a very specific set of resolutions available. 720p HDTV is 1280 x 720 and 1080p HDTV is 1920 x 1080. HDTV also operates at 30fps.

A megapixel camera that is 1.3 megapixels has a resolution of 1280 x 1024. From there the megapixels go up. 2, 3, 5, and on up to 16mp. However they are not able to capture images at 30 fps. They typically are only capturing 3 to 7 fps. Megapixel cameras can display higher than HDTV resolutions on PC monitors that support higher resolutions.

Take a look at the chart below to see how some of the more common resolutions compare.

How does CCTV Resolution compare to other standards?

Designation	H x V
CIF	352 x 240
2CIF	704 x 240
4CIF	704 x 480
D1	720 x 480
720p HDTV	1280 x 720
1.3MP	1280 x 1024
2MP	1600 x 1200
1080p HDTV	1920 x 1080
3MP	2048 x 1536
5MP	2592 x 1944
11MP	4000 x 2656
16MP	4872 x 3248

I hope you enjoyed this article on CCTV Resolution. If you have further questions please visit the Contact Us page on www.truvision.co.uk 

The Cost to the Public of Public Area CCTV?

The Cost to the Public of Public Area CCTV?

What actually is the cost of Public Area CCTV operated by your Local Authority per person per year in your community?

Go on, make a guess! Write it down and then compare it with the true figure.

I'm afraid I can't give you the exact figure for your Local Authority, but after a survey of many systems in the UK, I can give you the 'average costs' of such systems. Are you ready to be surprised? Then the answer is £2.03 per person in the authority area PER YEAR! Say the about equivalent of £10 per familyper year

Surprised, then so was I, and the cost ranges from 30p per year  per person to a maximum of £4.07 per year per person.

Isn't that incredible value for money? Well we have more statistics that show what is achieved for that incredibly low cost, and conversley what is risked if your authority decides to close the system, or reduce operating hours etc to save money for budget cuts.

These costs originate from a survey the CCTV User Group carried out of its members systems (still ongoing so any changes will be updated here as more statistics come available this is the position on 12/09/2011, with about 10% of all Local Authority Public Area CCTV systems responding, covering approximately 10% of the UK population. The number of cameras however implies it could at this stage be skewed towards the larger systems).

They above figures are based on the annual operating cost per year of the system, divided by the resident population of the authority area.

So what do these systems achieve?

I am sure you have seen the benefits and achievements of Public Area CCTV during the recent riots, but for more information on the value of CCTV in identifying culprits in them can be seen on the August 2011 fly-out menu for Exploding the Myths'

  

Statistics of CCTV System Achievements

	Number of Incidents recorded by CCTV Systems	Percentage originated by the Operator	Number of Video Reviews	Number of Evidence Discs Seized	Number of Arrests witnessed by CCTV System
Highest	16,973	90%	3,500	1,494	2,302
Average	4,885	42%	1,140	699	807
Lowest	215	9%	125	100	15

Now many of you might be wondering about the significant range of costs and values in these results. The problem is no two systems are alike. Some might be very small and some quite large. Some are inner cities and some more rural shire districts. Different systems also have different approaches to recording such statistics, and in others many control rooms provide many other services apart from CCTV, eg Carelines for vulnerable adults, or out of hours emergency telephone response for the authority. As it is often difficult to accurate sub-divide these costs with the same staff dealing with all these functions it is difficult to be precise. But they are offered as an indication.

So, that's the cost per person and what that money achieves, but on a daily basis what does it cost to run the CCTV system and what does that achieve?

  

The Cost of Operation of a Public Area CCTV System  £

	Cost per Authority Population	Cost per Incident Recorded	Cost per arrest witnessed	Cost per hour of Operation
Highest	4.07	953	1,000	91.32
Average	2.03	163	475	36.62
Lowest	0.30	16	65	4.26

Of these I think the most telling is the average cost per hour of operating a Public Area CCTV System. At less than £40 per hour for a 24/7/365 service it probably doesn't match the cost of the equivalent 1 Police Officer 24/7/365. But in CCTV terms the average system provides the equivalent of about 150 pairs of eyes, and the ability to record the evidence in a manner that the event can be graphically illustrated by recorded images.

Dome Cameras Vs PTZ Cameras

What are the differences between these two security cameras? They both look like domes right? Both security cameras are both great in design, and appeal. However, they have  major differences. Those differences start at the insides of the cameras. 
PTZ security cameras have a super brain inside their smoked color domes. The brain of a ptz camera, has artificial intelligence. Most ptz security cameras have to be manually zoomed in and out. They also pan both left and right. Seems that compared to regular dome security cameras they are just far more advanced. 

Dome cameras have the ability to have a fixed lens, or a varifocal lens built into the base of the dome.  Dome cameras can never be manually controlled. They can never be zoomed in and out or panned side to side.  There are many different sizes and styles of ptz cameras. Ptz security cameras can be made into "recess mounted" domes. They are so small that they look like dome cameras. With their smokey domes, it would be hard to know if the dome was looking at you, or that it is zooming in and out. Recess mounted ptz cameras could fit into residential communities and never be reported because they are so small. 

Just know that when trying to compare these two cameras it is not even a contest. Dome cameras are just not in the same class as ptz cameras. When you look at the price tag between the two, you can understand why they are in separate classes. When it comes to surveillance systems it really does not matter which camera is more powerful than others. It is about what it can do in an overall security setup. For example, if you have an indoor CCTV setup, then having ptz security cameras will not do you much good, in that they are too powerful. Instead a collection of fixed dome cameras with 3.5mm lens will do better. 

PTZ cameras are meant for an entirely different purpose. So you can see why we can say, the fight between which camera is the best becomes a no contest. In the end neither camera can out do each other. Choosing the right camera depends on what you need to accomplish in your security needs. But for the record PTZ cameras have the best technology, and are far more superior than dome cameras. However, dome cameras are more versatile and are cheaper than ptz cameras. So we declare this bout a "no contest"!