fbpx
Duke Security Pixel

A Guide to CCTV Camera Resolution

One of the considerations that anyone makes when specifying security cameras is the CCTV Camera Resolution. But what is it, and how does it compare against what we’re used to, such as 1080p TV? To understand this we first need to understand what a ‘pixel’ is.

The Humble Pixel

If like me you were born in the 80’s and grew up in a house with a boxy CRT television, chances are you probably put your hair against the static screen to fool your parents you have been electrocuted…

Whilst doing so, you probably looked right into the screen and saw something similar to the below?  

What you actually see here are the individual pixels of red, green and blue light that together make an ‘image’.

The density of these pixels (how tightly they are packed together) is what we call resolution.

So what is Megapixel?

A megapixel or MP simply means a million pixels. It is just one of the methods in which resolution (the pixel density) is measured.  

So what about my 1080p TV?

Rather strangely TV manufacturers continued to measure their resolution in the number of vertical pixels on the screen. This dates back to old analogue TVs where resolution was measured in television lines (or TVL).

In essence 1080p means 1080 pixels horizontal.

When using the widescreen aspect ratio of 16:9 (16 units horizontal is equal to 9 units vertical) you get a horizontal figure of 1920 pixels. To calculate what this means in megapixel, you multiply these numbers together to get a figure of 2,073,60 – 2 and a bit megapixel.

So what is 4k?

Where a resolution is measured in “k” manufacturers are again talking about the vertical number of pixels. 4k in vertical pixels equates to 3840 (it’s close to 4,000). Using the same calculation as above will give you a figure of 8,294,400 pixels or an 8mp image.  

For a better insight into resolution comparison, see the chart below:

CCTV Camera Resolution vs TV formats

ResolutionImage SizePixels per ImagesAspect Ratio
1080p1920 x 10802,073,60016:9
4MP (1440p)2560 x 14403,686,40016:9
5MP (1920p)2560 x 19205,017,6004:3
4k (8MP)3840 x 21608,294,40016:9
Resolution Comparison

Table of Contents

Contact Us

Other Usefull Content
Video Doorbell Duke Security
Video Doorbells vs CCTV

More homeowners are turning to Video doorbells vs CCTV. The likes of amazon’s ring doorbell and google’s nest have been providing the public with a

Read More »
Hikvision ColorVu Features
What is Hikvision ColorVu?

ColorVu is on of Hikvision’s most important innovations to date, but what is it and how is it better than normal CCTV or Darkfighter technology. For years

Read More »
Share:
Share on facebook
Facebook
Share on twitter
Twitter
Share on pinterest
Pinterest
Share on linkedin
LinkedIn
On Key

Related Posts

Hikvision ColorVu Features

What is Hikvision ColorVu?

ColorVu is on of Hikvision’s most important innovations to date, but what is it and how is it better than normal CCTV or Darkfighter technology. For years

Hikvision AcuSense

What is Hikvision AcuSense?

AcuSense is Hikvision’s latest innovation to the CCTV market, but what is it and what benefit does it bring vs conventional CCTV? Most users’ CCTV

Dummy cctv camera, duke security systems, cctv installation in peterborough

Do dummy CCTV cameras work?

As with normal CCTV, homeowners have increasingly turned to dummy CCTV cameras to add an additional deterrent to their property, but do they actually work?

Air duster, glass cleaner and microfibre cloth Duke Security Systems

How to Clean CCTV Cameras

For CCTV systems to be effective, keeping your system in tip-top form is crucial. If your cameras are externally located, dust and grime will inevitably