Pixel density on target
Detection (D)
25 px/m
Confirm a person or vehicle is present. Distinguish from background.
EN 62676-4 · IEC 62676-4 · 2026
EN 62676-4 CCTV Calculator (2026): DORI Compliance for European Integrators
A defensible DORI calculation per camera, in the browser, with the same pixel-per-metre ladder cited by EU public tenders, insurance auditors, and the harmonised IEC 62676-4 international edition. No install. No spreadsheet wrangling. No guesswork.
What the standard actually says
EN 62676-4 turns CCTV from opinion into measurement.
EN 62676-4 is the application-guideline part of the EN 62676 video surveillance series. Where parts 1–3 cover system, transmission, and image-quality requirements, part 4 is the practical part: it tells the designer how to size cameras for an actual operational task. It does this by anchoring four named tasks to four pixel densities on the target plane: Detection at 25 px/m, Observation at 62.5 px/m, Recognition at 125 px/m, and Identification at 250 px/m. These are the only thresholds an EU auditor will accept as evidence of fitness for purpose.
The 2025 IEC 62676-4 amendment adds OODPCVS — a parallel seven-step pixel-density ladder (Overview 20, Outline 40, Discern 80, Perceive 125, Characterise 250, Validate 500, Scrutinise 1500 px/m) running alongside the four classic DORI thresholds. The numerical DORI ladder is unchanged, so existing designs remain valid. OODPCVS adds three coarser tiers below DORI Detect for wide-area awareness, overlaps DORI in the middle (Perceive ≈ Recognize, Characterise ≈ Identify), and introduces two new tiers above DORI Identify for facial verification and passport-grade capture. New EU tenders published from 2026 onwards increasingly specify OODPCVS levels in addition to (or instead of) DORI.
Critically, the standard says nothing about brand. A 4 MP IP camera from any compliant vendor delivering 250 px/m on the licence plate plane gives you EN 62676-4 Identification. A 12 MP fisheye dewarped to 60 px/m at the perimeter gives you Observation, not Recognition. The maths does not care about the logo on the housing — it cares about lens, sensor, distance, tilt, and corridor mode.
The DORI ladder, with operational meaning
Pixel density on target
Observation (O)
62.5 px/m
Discern characteristic details such as clothing, posture, ongoing actions.
Pixel density on target
Recognition (R)
125 px/m
Decide with high certainty whether a person already known to the viewer is the one shown.
Pixel density on target
Identification (I)
250 px/m
Establish identity beyond reasonable doubt. Required evidentiary level for many jurisdictions.
Numbers from EN 62676-4 § Operational requirements. Identical thresholds in IEC 62676-4. CCTVplanner colours each camera by the highest DORI band it satisfies on its target plane.
OODPCVS — the 7-step ladder (IEC 62676-4:2025)
The 2025 amendment adds a parallel seven-step pixel-density ladder. The four classic DORI thresholds are unchanged; OODPCVS adds three coarser tiers below DORI Detect and two finer tiers above DORI Identify, giving procurement teams finer-grained coverage targets — including levels for facial verification and passport-grade biometric capture.
| px/m | DORI (4 steps) | OODPCVS (7 steps) | Typical use |
|---|---|---|---|
| 20 | — | Overview | Crowd watch, wide-area awareness |
| 25 | Detect | — | Perimeter, motion-trigger cameras |
| 40 | — | Outline | Yard-level shape recognition |
| 62.5 | Observe | — | Activity & clothing colour |
| 80 | — | Discern | Object category & broad activity |
| 125 | Recognize | Perceive | Read posture, recognise a familiar person |
| 250 | Identify | Characterise | Identify a known person, read EU plate |
| 500 | — | Validate | Facial verification, ANPR off-axis |
| 1500 | — | Scrutinise | Passport-grade biometric capture |
Rows shaded green: OODPCVS and DORI share the same px/m threshold and you can quote either label in a tender. Unshaded rows are unique to one ladder.
Worked example: licence-plate capture at a vehicle gate
Brief. Single-lane vehicle entry, 6 m from camera mount to the plate-read line, plate width 0.52 m, requirement: Identification (250 px/m) on the plate.
Required pixels across the plate. 250 px/m × 0.52 m = 130 px across the plate width.
Lens choice. A 4 MP camera with a 1/2.8-inch sensor and a 12 mm lens delivers an HFOV of roughly 25° at the plate distance. At 6 m that gives a horizontal scene width of about 2.66 m, with 2560 horizontal pixels — i.e. 962 px/m on the target plane. The plate occupies ~500 px, easily clearing 130 px and the 250 px/m floor with margin.
Tilt correction. Mount the camera at 2.4 m with 15° downward tilt — pixel density on the actual licence-plate plane drops by the cosine of the included angle. CCTVplanner does this trigonometry for you, on every camera, every time.
Result. Camera passes EN 62676-4 Identification on the plate plane. The export PDF shows the px/m number, target distance, lens used, and tilt — exactly what an auditor or insurance inspector will ask to see.
Why every European integrator now needs an EN 62676-4 calculator
Public-sector tenders across Germany, France, the Nordics, Poland, Italy, and Spain reference EN 62676-4 in the technical specification. Without a per-camera DORI table, the bid is simply non-conformant — there is no second-place argument.
Insurance and risk audits increasingly require evidence of fitness for purpose. "The cameras looked good" is not an answer when a claim is rejected. EN 62676-4 gives the integrator a standardised vocabulary — Detection, Observation, Recognition, Identification — that the underwriter already understands.
Disputes with end customers usually start with mismatched expectations: the customer wanted a face, the integrator delivered a silhouette. Citing the EN 62676-4 ladder up front prevents the argument: "You signed off on Recognition (125 px/m), not Identification (250 px/m)."
And — practically — manual EN 62676-4 calculations across 60 cameras on a multi-floor site take an evening with a spreadsheet. With CCTVplanner the per-camera DORI breakdown is visible the moment you place a camera, recomputed live as you change lens, tilt, or mounting height.
How CCTVplanner implements EN 62676-4 (and IEC 62676-4)
Per-camera DORI, recomputed live
Every camera placed on the canvas reports D / O / R / I distance bands using the EN 62676-4 thresholds. Change the lens, tilt, mounting height, or corridor mode and the bands recompute instantly.
True 3D pixel density on the target plane
Mounting height, tilt, and obstacle Z-ranges all influence the actual px/m at the working plane. CCTVplanner does the trig in 3D, not in flat-floor approximation, so the DORI band shown matches the band an auditor will measure.
Audit-ready PDF export
The exported PDF includes the per-camera DORI table — px/m on target, lens, sensor size, mounting height, tilt — exactly the evidence required by EN 62676-4 § design documentation.
EU-hosted, EU-engineered
DEFENSAR. 100% Engineered and Hosted in the EU. Public-sector tenders that ask the origin question get an answer that does not need an asterisk.
EN 62676-4 compliance checklist
- Define the operational task per camera (Detection, Observation, Recognition, or Identification).
- Verify pixel density on the target plane meets the EN 62676-4 ladder (25 / 62.5 / 125 / 250 px/m).
- Document HFOV, focal length, sensor width, and target distance for every camera in the project file.
- Account for tilt angle and mounting height — DORI on the ground plane drops as cameras tilt down.
- Cross-check storage retention against EN 62676-1 system-level requirements.
- Include the DORI table in the design submission, signed by the integrator of record.
Frequently asked questions
What is EN 62676-4 and who must comply with it?
EN 62676-4 is the European application-guideline part of the EN 62676 video surveillance series. It defines the DORI performance ladder (Detect 25, Observe 62.5, Recognize 125, Identify 250 px/m on target) and gives integrators a defendable framework for sizing lens, sensor, and mounting per camera. Public-sector tenders across the EU, EN-standard markets in the Middle East, and many private security contracts now reference it explicitly. The 2025 IEC 62676-4 amendment adds OODPCVS — a parallel seven-step ladder (Overview 20, Outline 40, Discern 80, Perceive 125, Characterise 250, Validate 500, Scrutinise 1500 px/m) that lets tenders specify both lower-density wide-area coverage and higher-density biometric capture that classic DORI could not address.
How is EN 62676-4 different from IEC 62676-4?
IEC 62676-4 is the parallel international standard with the same numerical thresholds and the same DORI definitions. EN 62676-4 is the harmonised European edition adopted by CEN/CENELEC. For a designer the maths is identical — the DORI numbers, pixel-per-metre thresholds, and worked-example methodology match. The difference matters only at procurement: EU tenders typically cite the EN edition, international tenders typically cite the IEC edition. CCTVplanner reports DORI in a way that satisfies both citations.
Can I claim EN 62676-4 compliance from a CCTVplanner export?
The PDF export contains the per-camera DORI breakdown, target-plane distances, and the lens parameters used to compute them — which is exactly the evidence an auditor expects to see. The integrator of record still signs the submission. CCTVplanner is the calculation engine; the responsible person on the project is the one who certifies the design.
Does the EN 62676-4 calculator work for fisheye and corridor-mode cameras?
Yes. CCTVplanner handles corridor (rotated) mode, dewarped fisheye effective resolution, and the geometric correction for tilt — all of which materially change the px/m on the working plane. A 4 MP camera in corridor mode does not give you 4 MP across the rotated frame, and a 12 MP fisheye does not give you 12 MP at the periphery; the calculator reflects this rather than assuming a flat sensor.
What about the 2025 OODPCVS update?
The 2025 update adds OODPCVS — a seven-step pixel-density ladder (Overview, Outline, Discern, Perceive, Characterise, Validate, Scrutinise) running alongside the classic four-step DORI ladder. The four DORI thresholds (25/62.5/125/250 px/m) are unchanged, so existing EN 62676-4 designs do not need to be reworked. OODPCVS adds three coarser tiers below DORI Detect for wide-area awareness, and two new tiers (Validate 500 px/m, Scrutinise 1500 px/m) above DORI Identify for facial verification and passport-grade biometric capture. CCTVplanner exposes both ladders today — a per-camera toggle in the designer plus dedicated /calculator/dori and /calculator/oodpcvs tools.
Run an EN 62676-4 design in your browser
Free to start. DORI per camera. Audit-ready PDF. EU-hosted. Used by integrators from all over the world.
Also explore: DORI calculator · Pixel density calculator · Johnson Criteria calculator · NDAA §889 compliance
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