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CCTV DORI Distance Calculator (EN 62676-4)

Calculate EN 62676-4 CCTV DORI detection, observation, recognition, and facial identification reach distances based on sensor resolution and lens optics.

Input Parameters

Try Example:
m

Calculation Results

targetDistM
10
resolution
1080p
focalMm
4
horizontalFovDeg
80
coverageWidthM
16.5
ppmAtTarget
116
currentStatus
Observation (62+ PPM - Observasi Aktivitas)
currentStatusEn
Observation (62+ PPM - Activity Observation)
detectionDistanceM
46.5
observationDistanceM
18.8
recognitionDistanceM
9.3
identificationDistanceM
4.7
summaryText
Kalkulator Standar DORI CCTV (EN 62676-4) – InfraCalc.id Kamera & Lensa : 2 MP (1080p Full HD - 1920×1080) @ Lensa 4mm (FoV ~80°) Jarak Pantau : 10 meter (Lebar Pandang FoV: 16.5 m) Kerapatan Riil : 116 PPM (Observation (62+ PPM - Observasi Aktivitas)) Jangkauan Standar DORI: - Deteksi (25 PPM) : s/d 46.5 m - Observasi (62 PPM) : s/d 18.8 m - Pengenalan (125 PPM) : s/d 9.3 m - Identifikasi (250 PPM): s/d 4.7 m

How to Use This Tool

  1. Specify your intended surveillance target distance in meters from the camera.
  2. Select camera sensor resolution (1080p Full HD, 4MP 2K QHD, or 4K 8MP Ultra HD).
  3. Choose lens focal length (2.8mm, 4mm, 6mm, or 12mm) to evaluate boundary distances across all DORI tiers.

Worked Example: Standard 1080p Lens 4mm @ 10m Distance

Worked example: A 1080P camera with a 4mm lens at 10 meters delivers an effective density of 116 PPM (Observation (62+ PPM - Activity Observation)). Standard DORI distance thresholds: Detection up to 46.5m, Observation up to 18.8m, Recognition up to 9.3m, and Facial Identification up to 4.7m.

Example Input
{
  "targetDistM": 10,
  "resolution": "1080p",
  "focalMm": 4
}
Calculated Output
targetDistM:
10
resolution:
1080p
focalMm:
4
horizontalFovDeg:
80
coverageWidthM:
16.5
ppmAtTarget:
116
currentStatus:
Observation (62+ PPM - Observasi Aktivitas)
currentStatusEn:
Observation (62+ PPM - Activity Observation)
detectionDistanceM:
46.5
observationDistanceM:
18.8
recognitionDistanceM:
9.3
identificationDistanceM:
4.7
summaryText:
Kalkulator Standar DORI CCTV (EN 62676-4) – InfraCalc.id Kamera & Lensa : 2 MP (1080p Full HD - 1920×1080) @ Lensa 4mm (FoV ~80°) Jarak Pantau : 10 meter (Lebar Pandang FoV: 16.5 m) Kerapatan Riil : 116 PPM (Observation (62+ PPM - Observasi Aktivitas)) Jangkauan Standar DORI: - Deteksi (25 PPM) : s/d 46.5 m - Observasi (62 PPM) : s/d 18.8 m - Pengenalan (125 PPM) : s/d 9.3 m - Identifikasi (250 PPM): s/d 4.7 m

Core Concept & Engineering Notes

The international standard EN 62676-4 establishes an authoritative, objective engineering benchmark for designing, auditing, and validating video surveillance camera deployments through physical pixel density metrics. Widely recognized across the global physical security engineering industry by the acronym DORI, this framework categorizes optical acuity into four distinct operational criteria: Detection, Observation, Recognition, and Identification. The baseline tier is Detection, strictly defined at 25 PPM (pixels per meter). At this threshold, security personnel or automated computer vision detection pipelines can reliably verify human presence against outdoor background terrain, though distinguishing personal identity remains impossible. The second tier, Observation (62.5 PPM), yields sufficient scene resolution to examine characteristic attributes such as apparel coloration, carried baggage, or directional body movement. The third tier is Recognition (125 PPM), empowering operators to verify whether an individual matches a previously known acquaintance, coworker, or registered authorized staff member beyond reasonable doubt. The paramount tier is Identification (250 PPM). This stringent threshold serves as the authoritative forensic benchmark for presenting undeniable evidence in judicial proceedings, enabling unequivocal facial identification of unfamiliar criminal suspects. Pixel density correlates directly with sensor horizontal pixel resolution and inversely with physical scene width at target distance. This calculator models optical focal lengths and sensor dimensions to deliver rigorous DORI operational boundary distances for any surveillance installation.

How It Was Calculated (Formulas & Steps)

Frequently Asked Questions (FAQ)

What is the key legal difference between Recognition (125 PPM) and Identification (250 PPM)?

Recognition (125 PPM) suffices to determine whether an individual is someone already known to the observer (such as an employee). Identification (250 PPM) represents the forensic legal standard enabling law enforcement to identify unfamiliar suspects from criminal registries with definitive certainty.

How can I extend DORI identification reach without rerunning existing cabling?

You can either upgrade the camera body to a higher sensor resolution (e.g., from 2MP to 4K) to multiply available horizontal pixels, or swap to a narrower telephoto lens (such as from 2.8mm to 6mm or 12mm) to concentrate optical resolving power on distant subjects.

Does night-time infrared (IR) illumination affect DORI standard compliance?

While geometric PPM thresholds remain identical, night-time monochrome IR introduces sensor noise and risks facial overexposure (white-out) from proximity LEDs. Engineers recommend budgeting a 20–30% pixel safety margin or adopting Smart IR / full-color low-light sensors for critical night surveillance.

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References & Notes

Last updated: Content Status: Draft (Pending Editorial Review)

Note: Results above are mathematical estimates based on standard formulas. Always verify against official vendor documentation and site conditions before production deployment.