Individual vs. device-class attribution
Definition
Individual attribution identifies one specific camera body. Device-class attribution identifies only the make or model. PRNU provides individual attribution; metadata and lens-distortion methods typically provide only class attribution.
Related terms
- Anti-forensic PRNU suppression
- Deliberate actions to remove or obscure the PRNU fingerprint, such as adding PRNU-erasing noise, applying heavy lossy compression, or scaling and re-cropping...
- Base rate problem
- The statistical challenge facing any deception-detection method: if only a minority of statements examined are actually deceptive, even a method that is...
- PRNU suppression
- Any processing that reduces the usable PRNU signal in an image: heavy JPEG compression, resolution downscaling, in-camera noise reduction, social-media re-encoding, and...
- Shared device model
- The scenario in which multiple individuals use the same camera. The PRNU fingerprint links an image to the device, not to any...
- Uncertainty quantification in PRNU
- Expressing a PRNU attribution result not just as a binary yes/no but with stated PCE values, false-positive rate at the threshold used,...
Explained in
- PRNU in Casework: Limitations and ReportingIndividual attribution identifies one specific camera body. Device-class attribution identifies only the make or model. PRNU provides individual attribution; m...