Buying a CCTV camera is not just about selecting the highest megapixel option. The real question is:
“What level of detail do you actually need from the camera?”
A camera installed for perimeter monitoring has very different requirements compared to a camera installed at an entry gate or cash counter.
This is where the DORI standard helps.
What is DORI?
DORI stands for:
- Detection
- Observation
- Recognition
- Identification
It is an international CCTV standard used to measure how effectively a surveillance camera can capture details at specific distances.
For example:
- A camera may detect motion at 25 meters,
- but may only clearly identify a person at 8 meters.
Understanding this difference helps businesses and apartment communities select the right surveillance solution without over-spending or compromising security.
Why DORI Matters When Buying CCTV Cameras
Many buyers focus only on:
- Camera resolution
- Brand
- Night vision
- Pricing
However, proper surveillance planning also depends on:
- Camera distance
- Lens selection
- Pixel density
- Lighting conditions
- Coverage objectives
Different areas require different surveillance outcomes.
| Location | Recommended DORI Level |
| Boundary wall | Detection |
| Parking area | Observation |
| Main gate | Recognition |
| Reception or cash counter | Identification |
Using DORI-based planning helps ensure:
- Better image clarity
- Improved incident investigation
- Smarter camera placement
- Better long-term value
Common CCTV Buying Mistakes
Some of the most common mistakes include:
- Choosing cameras only based on megapixels
- Installing wide-angle cameras everywhere
- Ignoring night-time performance
- Poor placement planning
- Underestimating storage and bandwidth needs
A professionally designed surveillance solution should always balance:
- Coverage
- Detail level
- Budget
- Scalability
- Future expansion
Final Thoughts
The best CCTV camera is not necessarily the most expensive one.
It is the camera that delivers the right level of detail for the intended operational requirement.
DORI-based surveillance planning helps organizations make smarter investment decisions while improving overall security effectiveness.
Want to Learn More About DORI and Pixels Per Meter (PPM)?
If you would like to understand the technical side of:
- Detection vs Identification
- Camera distance calculations
- Pixels Per Meter (PPM)
- Real-world surveillance design principles
Read our detailed Technology Explained article:
Understanding DORI in CCTV — Why Camera Resolution Alone Is Not Enough
