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polimi-ispl / prnu-python

Python implementation of PRNU extractor
MIT License
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How to extract my own fingerprint #6

Closed JhxxxQ closed 1 year ago

JhxxxQ commented 1 year ago

Hello, @nicobonne I try to extract fingerprint for my own camera and I run the following code which you provide:#1. However, the pixel value of k is small and has some negative values. And I look the image of test/data/prnu1.jpg, these pixel values range from 0 to 255. I would to like how to convert k to a pixel value from 0 to 255? Thank you!

nicobonne commented 1 year ago

PRNU is not an image, it is a noise pattern and it is saved in floating point values. The dynamic range you got is correct. Don't get fooled by the names: test/data/prnu1.jpg is a test image to be used to extract PRNU, it's not the PRNU itself.