How it works
A camera blind spot is an area that the intended surveillance view does not adequately capture. It can lie outside the field of view or behind an obstruction. An area technically visible but too dark, too distant or too indistinct for the task is also a practical coverage limitation, even if it is not geometrically hidden.
A practical example
An entrance camera may show the approach but miss a person standing immediately beneath its mount. A wall, open door or parked vehicle can conceal another area. These examples show why a wide angle and a high resolution do not by themselves establish complete usable coverage.
What to check
Inspect the real installation at relevant positions and times, including darkness and changing obstacles. Walk the intended route with an authorized test participant and review the actual recording. Compare coverage with the task rather than only the live preview. Adjust position or lens where appropriate and verify overlapping cameras without assuming overlap is automatically useful.
Limits and safe use
More cameras do not always solve the problem: poor lighting, placement or privacy restrictions still matter. A diagram is a planning aid rather than proof of identification quality. Avoid promising total coverage from one specification. Preserve the distinction between areas intentionally excluded for privacy and areas accidentally missed, and document remaining limitations after testing.