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Add random noise does not make noise analysis pointless? #4

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opened 2024-03-04 15:10:23 +01:00 by Benjamin_Loison · 5 comments
Benjamin_Loison commented 2024-03-04 15:10:23 +01:00
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As evaluating fixed patterns is difficult or even some biased random patterns are impossible to correct?

Like manufacturer/OS could implement it for privacy but at the same time they want the best quality?

In general are there physical and software methods to avoid PRNU?

As evaluating fixed patterns is difficult or even some biased random patterns are impossible to correct? Like manufacturer/OS could implement it for privacy but at the same time they want the best quality? In general are there physical and software methods to avoid PRNU?
Benjamin_Loison commented 2024-03-23 17:58:45 +01:00
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Or only if a few pixels are concerned, then could just interpolate them, as I did in another context:

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Or only if a few pixels are concerned, then could just interpolate them, as I did in another context: ``` -----BEGIN PGP MESSAGE----- hF4DTQa9Wom5MBgSAQdAbHlEvPzyXyRH1Nw6SmVsSiLvl7d0LTTUM/nTV5bAwW0w m/CLjHbSZXU1qPVChUSSDIb6LTrQnZkH3nFLPbX1kqBnQajgJs/ep9PLqfHLYfft 0ooBANgHqFjpZBc1DF1vOLkI4dNVwESlYc+WQgcKwsLdkBZwpcwrUYXDM9FfT5zA X7jqK7GgmKveWpKXvnshLxMEpbfgV+bOjxbxDrxkdalJp4EGEzEEddYtNw7xV09O rH7LTpPu50tHdl+VN0EszFBiky2dyxZkARd/MGf0OfRxAnplKGBSfUS45FQ= =pRBS -----END PGP MESSAGE----- ```
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Benjamin_Loison commented 2024-04-09 20:11:23 +02:00
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In theory could just mean added noise and it would converge to 0, no?

In theory could just mean added noise and it would converge to 0, no?
Benjamin_Loison commented 2024-05-02 20:53:39 +02:00
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Related to Benjamin-Loison/android_packages_apps_Aperture/issues/7#issuecomment-2091275633.

Related to [Benjamin-Loison/android_packages_apps_Aperture/issues/7#issuecomment-2091275633](https://github.com/Benjamin-Loison/android_packages_apps_Aperture/issues/7#issuecomment-2091275633).
Benjamin_Loison commented 2024-05-30 12:19:40 +02:00
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See section V. of src/commit/ec9f6e7acaaeb6b1ffe14d3841e87bf8cc7e526b/articles/Digital%20Camera%20Identification%20from%20Sensor%20Pattern%20Noise.

See section V. of [src/commit/ec9f6e7acaaeb6b1ffe14d3841e87bf8cc7e526b/articles/Digital%20Camera%20Identification%20from%20Sensor%20Pattern%20Noise](https://gitea.lemnoslife.com/Benjamin_Loison/Robust_image_source_identification_on_modern_smartphones/src/commit/ec9f6e7acaaeb6b1ffe14d3841e87bf8cc7e526b/articles/Digital%20Camera%20Identification%20from%20Sensor%20Pattern%20Noise).
Benjamin_Loison commented 2024-06-22 00:08:41 +02:00
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In theory the manufacturer could establish the PRNU of each camera to then recognize what device thanks to a given image and find who buy it etc.

In theory the manufacturer could establish the PRNU of each camera to then recognize what device thanks to a given image and find who buy it etc.
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Reference: Benjamin_Loison/Robust_image_source_identification_on_modern_smartphones#4
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