4 ms·
Maybe you could compute the spectrum or some other characteristic of the noise and compare it to the type of noise you would expect from a camera. I guess you
by d_tr 4y ago
Maybe you could compute the spectrum or some other characteristic of the noise and compare it to the type of noise you would expect from a camera.
I guess you can always mimic these things to some degree if you are determined enough though.
- Kubuxu 4y agoYeah, this is what you do, for example re-encode the image with Gray code (avoids the Hamming cliff), you split the bit-planes into 8x8 blocks, compute the entropy within them and encode the data for that block in such a way that it has same/very similar entropy, re-encode from Gray back into normal binary. See https://web.archive.org/web/20120905034757/http://www.eece.maine.edu/~eason/steg/SPIE98.pdf https://web.archive.org/web/20120905034757/http://www.eece.m...
- GoblinSlayer 4y agoThat too, say, 3-state modulation. Ethernet uses extra degree of freedom to increase entropy, but it can decrease entropy too, create a fake bias and approximate desired statistics. As a bonus stretch the key the second time and use it as a running bias for the modulation.