Share:
Glossary Forensics

PRNU

PRNU (photo response non-uniformity) is the tiny, fixed pattern of noise unique to a camera's image sensor, which can act as a fingerprint linking a photo to the camera that took it.

Last reviewed:

AdSense Placeholder
Slot: header_reference_page

In more detail

Manufacturing imperfections make each sensor pixel respond very slightly differently. Averaging many photos from one camera reveals that pattern, and a questioned photo can be tested for it. Heavy compression, resizing and editing weaken the match, so results are probabilistic, not proof.

Try these tools

Image Forensics

Analyze photos for tampering with ELA, noise analysis, clone detection and EXIF metadata extraction.

See also

  • Glossary Error level analysis (ELA)
    Error level analysis (ELA) is a technique that recompresses a JPEG image at a known quality and maps how much each area changes.
  • Glossary Metadata
    Metadata is data about data: the hidden or secondary information a file carries about itself, such as its author, creation date.
Back to Glossary
AdSense Placeholder
Slot: footer_leaderboard