There's actually been some work to reverse the original PhotoDNA hash, with much more precise results than for Apple's NeuralHash: https://www.hackerfactor.com

There's actually been some work to reverse the original PhotoDNA hash, with much more precise results than for Apple's NeuralHash: https://www.hackerfactor.com/blog/index.php?archives/931-PhotoDNA-and-Limitations.html https://www.hackerfactor.com/blog/index.php?archives/931-Pho... https://anishathalye.com/inverting-photodna/ https://anishathalye.com/inverting-photodna/