By the SightShield team · · 3 min read
The number most shops do not know
Every retailer knows how many bills were made today. Very few know how many people walked in. Without that, you cannot tell whether a slow day was caused by fewer visitors or by visitors who left without buying. People counting cameras answer that question automatically, and the same AI cameras that secure the entrance can do it.
What footfall analytics measure
| Metric | What it tells you |
|---|---|
| Footfall | Visitors entering per hour, day and week |
| Conversion rate | Bills divided by visitors — the key measure of store performance |
| Heat map | Which areas and displays attract people and which are ignored |
| Dwell time | How long people stay in a zone, such as a new product display |
| Queue length | Alerts when billing queues grow so another counter can open |
| Occupancy | How many people are inside right now |
How the counting works
The most accurate method is an overhead camera above the entrance, looking straight down, which counts people crossing a line in and out. Some use dual-lens 3D sensors that measure height, ignoring trolleys and children below a set height if required. Angled cameras with AI can also count, but accuracy drops when people walk in groups. Counts are stored in the camera or NVR and can be exported or sent to a dashboard.
Accuracy factors
- Mount overhead at the height the maker specifies, centred on the doorway.
- Avoid strong backlight from glass doors; adjust WDR settings.
- Exclude staff by using a separate staff entrance or enrolling staff where the system allows.
- Check counts against a manual tally during setup, then recheck after any layout change.
Using the data
- Staff rosters: match staff numbers to busy hours instead of fixed shifts.
- Promotions: compare footfall and conversion before, during and after a campaign.
- Layout: move high-margin products into high-traffic zones shown on the heat map.
- Store comparison: compare conversion across branches with similar footfall.
- Window displays: measure whether a new display brings more people in.
A simple example
A Jayanagar clothing store counts 420 visitors on a Saturday and makes 63 bills, a conversion rate of 15 percent. On weekdays it counts 180 visitors and 36 bills, a 20 percent conversion rate. The data shows Saturday afternoons are understaffed: people come in but leave without help. Adding two staff from 3 pm to 8 pm on weekends lifts Saturday conversion, which the counts make visible within a few weeks.
Privacy
Counting and heat maps do not need to identify anyone — they count shapes and positions. Choose systems that store counts, not faces, and avoid adding face recognition to retail analytics without a clear legal basis. Footage remains personal data under the DPDP Act, so signage and retention policies still apply.
The DPDP Act and CCTV →Single store or chain
A single store can read daily counts from the NVR app. Chains benefit from a central dashboard that pulls counts and sales from each store. Only summary data needs to travel over the internet, so even modest broadband is enough.
Edge AI vs cloud AI cameras →Getting started
For most shops, one people-counting camera at each customer entrance is enough to start. We can add it to your existing IP CCTV system and help you set up the reports.
CCTV for retail and showrooms →Quick answers
How accurate are people counting cameras?+
Overhead counting cameras mounted correctly are highly accurate; angled cameras are less accurate when people walk in groups.
Can it exclude staff?+
Some systems can, through staff enrolment or a separate staff entrance; otherwise subtract known staff movements.
Does people counting identify customers?+
No. It counts movement, not identity.
What is a good conversion rate for a shop?+
It varies widely by category and location. The useful comparison is your own store over time, and between your branches, rather than an industry figure.
Does it need a separate internet connection?+
No. Counts are stored on the camera or NVR, and only small summary data is sent to a dashboard if you use one.
Can I add counting to my current CCTV?+
Usually yes, by adding a counting camera at the entrance that works with your NVR.