What this tool does
See how much of a recorded image is available to show a person or object. Use it to understand the trade-off between covering a wide area and capturing small details.
How to use it
- Enter the width of the saved video in pixels. For a 3840 × 2160 recording, enter 3840.
- Enter the scene’s width in metres at the distance of the person or object you care about.
- Add that person or object’s width to estimate how many pixels span it.
Reading your result
Pixels per metre tells you how much image detail is allocated to each metre of the scene. For the same recorded resolution, a narrower view gives more pixels to a subject.
Example: 3840 pixels across a 20 m view gives 192 pixels per metre. A 0.5 m-wide subject spans about 96 pixels.
Keep in mind
Use the resolution actually recorded, which may differ from the camera’s advertised maximum. Use the scene width at the subject, not at a closer point.
More pixels do not guarantee a recognisable face or readable plate. Lighting, movement, focus and video quality still matter; check real recordings.
Use Download results or Print to keep your inputs and estimate. The tool uses the values you enter; it does not read your equipment’s settings.
Reference: Axis camera documentation: bitrate, storage and pixel counting