Camera DORI calculator

Calculate target pixel density and ideal distances for the legacy DORI reference levels or your own density requirement.

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Horizontal image resolution (pixels)

Horizontal field of view (degrees)

More inputs and assumptions

Target distance (metres)

Custom required density (pixels/metre)

Answer

…

Calculate target pixel density and ideal distances for the legacy DORI reference levels or your own density requirement.

More results

Precision and calculation record

Decimal places in numeric results and text downloads

Rounding changes displayed numbers, not the calculation. Text, fractions, matrices and CSV schedules keep their own formatting. Automatic keeps up to 12 significant digits, with money shown to cents where applicable.

Saved scenario

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Formula and assumptions

Pinhole geometry with constant horizontal field of view. Reference levels follow Axis's April 2026 explanation of IEC 62676-4:2014: 25, 63, 125 and 250 pixels/metre. These are legacy model values, not a claim of compliance with IEC 62676-4:2025. Lighting, compression, motion, lens distortion and recognition performance require a site test. Thermal imaging and automated analytics need different requirements.

Automatic precision shows numbers to 12 significant digits. Thousands separators such as 1,000 are accepted; use a dot for decimals.

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Updated 2026-09-29

Using Camera DORI calculator

Calculate target pixel density and ideal distances for the legacy DORI reference levels or your own density requirement.

Next: Display viewing angle calculator

Next: Lens formula calculator

A worked example

For horizontal image resolution (pixels) = 1920, horizontal field of view (degrees) = 90, target distance (metres) = 10, custom required density (pixels/metre) = 250, pixel density at target (pixels/metre) = 96.

Before you use the result

Example results for horizontal image resolution (pixels)

These examples use Horizontal field of view (degrees): 90; Target distance (metres): 10; Custom required density (pixels/metre): 250. They are reference calculations, not recommended settings.

Horizontal image resolution (pixels)	Pixel density at target (pixels/metre)
960	48
1920	96
3840	192

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