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Index/Topics/Photo-Response Non-Uniformity (PRNU) Analysis

Photo-Response Non-Uniformity (PRNU) Analysis

A technique used to analyze the sensor noise fingerprint of an image to determine its origin.

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Jan 24, 2026
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What forensic methods do investigators use to attribute AI‑generated images to a specific model like Grok?

Investigators use a layered playbook—metadata inspection, pixel- and frequency-level analysis, sensor-noise fingerprinting, learned “model fingerprints,” and investigatory triangulation (reverse-searc...

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