3 ms·
Actually, the thermal noise of a camera is biased so a uniform random distribution of low-order bits will be easy to detect. You need to preserve as much of th
by betterunix2 6y ago
Actually, the thermal noise of a camera is biased so a uniform random distribution of low-order bits will be easy to detect. You need to preserve as much of the thermal noise as possible and try to choose pixels from high frequency regions of the image (where the thermal noise is harder to separate from the image itself).
- berdon 6y agoSo maybe the best approach would be to use a filter/transformation to exclude hard-lined regions (edges) and only embed data within variations/gradations?
- betterunix2 6y agoOther way around: edges are a good place to try to hide stegotext because of the high frequency components (the edge effect, which is also why JPEG artifacts are worse along sharp edges).