What Security Camera Resolution Is Best for Number Plates?

If you want a security camera to clearly capture vehicle number plates, it is easy to assume that the highest megapixel camera will automatically give the best result. An 8MP or 4K camera has more pixels than a 4MP camera, so surely it should read number plates better?

Not necessarily.

For number plate capture, resolution is only one part of the equation. Camera distance, lens choice, vehicle speed, shutter speed, viewing angle, lighting and whether the camera is specifically designed for Automatic Number Plate Recognition (ANPR) can all have a major impact on the final image.

In fact, a correctly positioned 4MP or 5MP ANPR camera can provide more reliable number plate capture than a general-purpose 8MP CCTV camera installed in the wrong location.

If number plate recognition is one of the main reasons you are installing CCTV, browse CTC Communications' Licence Plate Recognition Cameras or speak with our team about professional camera selection and installation.

Does Higher Resolution Mean Better Number Plate Capture?

Higher resolution provides more pixels, which can allow more image detail to be recorded. However, those extra pixels only help if the number plate occupies enough of the image and the camera can capture it sharply.

An 8MP camera covering an entire car park may provide excellent general surveillance, but a vehicle number plate could still represent only a very small part of the overall image.

By comparison, a 4MP ANPR camera with a motorised varifocal lens can be tightly focused on a driveway, gate or vehicle entry lane so the number plate occupies a much larger part of the image.

This is why megapixels should never be considered on their own when selecting a camera specifically for number plates.

What Resolution Is Best for Number Plates?

There is no single resolution that is automatically best for every property. The correct choice depends on the capture distance, width of the vehicle lane, lighting, vehicle speed and whether you need occasional visual identification or dedicated number plate recognition.

Why a 4MP ANPR Camera Can Beat an 8MP Standard Camera

This is one of the most important things to understand when comparing cameras.

A standard 8MP camera is designed to provide high-detail surveillance across a scene. It might need to show people, vehicles, buildings, gates and surrounding activity at the same time.

A dedicated ANPR camera has a much more specific job: capture vehicles and their number plates.

Depending on the model, specialist ANPR cameras may include:

• Motorised varifocal lenses for accurately adjusting the capture distance
• Fast shutter speeds to reduce motion blur
• Infrared illumination designed for vehicle and plate capture
• Low-light optimisation
• Dedicated vehicle detection algorithms
• Number plate recognition software
• Vehicle direction recognition
• Allow-list and block-list functionality on selected models
• Access control or boom-gate integration on selected systems

Those features can be more important than simply increasing the resolution from 4MP to 8MP.

ANPR Cameras vs Standard CCTV Cameras

A standard security camera and an ANPR camera can both record vehicles, but they are designed for different purposes.

How Distance Affects Number Plate Capture

Distance is one of the biggest factors in number plate identification.

If a camera is positioned too far from the vehicle, the plate may occupy only a small number of pixels in the recorded image. Even a high-resolution camera can struggle if it is being asked to cover too large an area.

This is where lens selection becomes extremely important.

A wider lens shows more of the scene but makes individual objects appear smaller. A narrower or zoomed lens concentrates more image detail onto the vehicle and number plate.

For example, CTC Communications offers the Dahua DHI-ITC413-PW4D-IZ3 ANPR Camera, which is designed for longer-range number plate capture up to approximately 30 metres in suitable installation conditions.

The key point is that the camera and lens need to be selected for the actual distance rather than simply choosing the highest megapixel specification.

Why Lens Choice Matters

Lens selection determines how much of the scene the camera sees and how large the number plate appears in that scene.

For a house driveway, a relatively short capture distance may allow a wider field of view while still providing useful plate detail.

For a commercial driveway, car park entrance or warehouse gate, a motorised varifocal lens may be more suitable because the installer can adjust the camera more precisely around the vehicle approach.

This is one reason specialist ANPR cameras commonly use adjustable lenses rather than relying only on a fixed wide-angle lens.

Why Shutter Speed Matters for Moving Number Plates

Vehicles move. That sounds obvious, but it changes the way a security camera needs to operate.

A slower shutter can collect more light, which may help general night-time surveillance, but it can also introduce motion blur when a vehicle is moving through the image.

A faster shutter can help freeze movement, making the number plate sharper. However, faster shutter speeds allow less light into the image, which means camera sensitivity, infrared illumination and overall setup become more important.

This is another reason dedicated licence plate cameras are designed differently from general-purpose surveillance cameras.

Capturing Number Plates at Night

Night-time number plate capture can be particularly challenging.

A camera may need to deal with:

• Vehicle headlights facing directly towards the camera
• Reflective number plates
• Low surrounding light
• Fast-moving vehicles
• Deep shadows
• Streetlights and uneven lighting
• Changing weather conditions

Simply installing a bright infrared camera does not automatically solve these problems.

A dedicated ANPR camera can use specialised exposure settings, infrared illumination and image processing to prioritise the number plate rather than trying to produce the brightest possible overall scene.

Can a 6MP or 8MP Camera Read Number Plates?

Yes, depending on the installation.

A quality 6MP or 8MP security camera may provide readable number plate footage when vehicles are close enough, travelling slowly, correctly angled to the camera and captured under suitable lighting.

This can work particularly well for residential driveways where a vehicle slows while entering or leaving the property.

However, if reliable number plate identification is a critical requirement rather than an occasional bonus, a specialist ANPR camera is generally the more appropriate approach.

For a broader resolution comparison, read our guide to 6MP vs 8MP Security Cameras.

What About 8MP and 4K Cameras?

8MP or 4K cameras provide excellent recorded detail and can be very useful around driveways, car parks, loading areas and larger properties.

The additional resolution can give you more flexibility when reviewing recorded footage, especially when the camera needs to cover a larger scene.

But an 8MP camera cannot compensate for:

• A vehicle being too far away
• The wrong lens
• Poor camera angle
• Excessive mounting height
• Motion blur
• Headlight glare
• Poor night-time exposure

This is why CCTV design should start with the question “What do we need to identify?” rather than simply “What is the highest-resolution camera?”

You can also compare the wider differences between resolutions in our 4K vs 6MP vs 8MP Security Cameras guide.

Best Camera for a Residential Driveway

For many homes, the goal is to identify vehicles entering or leaving the driveway rather than operate a fully automated ANPR system.

A good-quality 6MP or 8MP camera may be sufficient where:

• The vehicle passes relatively close to the camera
• The driveway naturally slows vehicles
• The camera can be positioned at a useful angle
• Night lighting is suitable
• The lens provides enough detail at the capture point

If the driveway is long, vehicles are further away, there is significant headlight glare or you specifically need consistent plate capture, a dedicated ANPR camera may be the better choice.

Best Camera for Commercial Car Parks and Gates

Commercial sites often have stricter vehicle identification requirements than residential properties.

ANPR cameras are particularly useful for:

• Commercial car parks
• Warehouse entrances
• Logistics depots
• Strata car parks
• Gated residential communities
• Industrial facilities
• Schools and campuses
• Hospitals
• Boom-gate access points
• Vehicle access control systems

Where number plates are being used for access control, authorised vehicle lists or regular vehicle identification, a proper ANPR solution is considerably more useful than relying on manual review of standard CCTV footage.

Real-World ANPR Camera Examples

Looking at specialist cameras demonstrates why resolution alone does not determine number plate performance.

The Vivotek IB9387-LPR-V2, for example, is a 5MP camera built specifically around licence plate recognition rather than simply maximum megapixel count.

When Do You Need Dedicated ANPR?

A dedicated ANPR camera is worth considering when number plate identification is an important part of the security objective rather than just something you hope to see occasionally.

Consider ANPR where you need:

• Reliable vehicle identification at an entrance
• Automatic number plate recognition
• Recorded plate data
• Vehicle allow lists or block lists
• Boom-gate integration
• Access control integration
• Monitoring of commercial car parks
• Vehicle tracking at warehouses or industrial sites
• More reliable night-time plate capture
• Plate capture at longer distances

Common Number Plate Camera Mistakes

Number plate capture often fails because the installation was designed for general surveillance rather than vehicle identification.

Common mistakes include:

• Choosing a camera based only on megapixels
• Trying to cover an entire car park and read plates with the same wide-angle camera
• Mounting the camera too high
• Using too wide a lens
• Positioning the camera at an excessive angle to the vehicle
• Ignoring vehicle speed
• Not testing the camera at night
• Allowing headlights to overwhelm the image
• Assuming digital zoom can recover detail that was never captured
• Using general CCTV when reliable ANPR is actually required

Should You Use One Camera for Overview and Another for Plates?

Often, yes.

This can be one of the best ways to design a vehicle surveillance area.

An overview camera can monitor the driveway, entrance, vehicles and surrounding activity, while a dedicated ANPR camera concentrates specifically on the number plate capture point.

This provides two different types of evidence:

• A wider view showing what happened around the vehicle
• A focused view designed to capture the vehicle number plate

For higher-risk commercial areas, car parks and access points, this approach can provide much more useful footage than trying to make one camera perform every role.

Professional Camera Placement Makes the Difference

Even an expensive ANPR camera will not perform properly if it is installed in the wrong position.

Before selecting a licence plate camera, consider:

• Distance between the camera and vehicle capture point
• Expected vehicle speed
• Lane width
• Camera mounting height
• Horizontal and vertical viewing angle
• Night-time lighting
• Headlight direction
• Whether vehicles stop, slow down or continue moving
• Whether automatic plate recognition is required
• Whether the camera needs to integrate with access control

CTC Communications provides professional CCTV installation across Sydney and can help select the right camera and lens for driveways, car parks, gates and commercial vehicle entrances.

So, What Resolution Should You Choose?

If you simply want good general CCTV coverage of a residential driveway, a quality 6MP or 8MP camera may provide all the detail you need when correctly positioned.

If your main goal is reliable number plate capture, do not select a camera based on resolution alone. A purpose-built 4MP or 5MP ANPR camera may perform considerably better because it is designed around vehicle capture, fast shutter speeds, appropriate lenses, low-light conditions and recognition software.

For commercial sites where plate information is important for security or access control, a dedicated ANPR camera is generally the more appropriate choice.

The best system starts by deciding exactly what you need to see, how far away the vehicle will be and how it will move through the site. The resolution comes after those questions — not before them.

Frequently Asked Questions