3 ms·
Depends on the watermark. The current watermark uses a DCT to add a bit of undetectable noise around the edges. It survives resizing but tends to fail after rot
by TheOtherHobbes 3y ago
Depends on the watermark. The current watermark uses a DCT to add a bit of undetectable noise around the edges. It survives resizing but tends to fail after rotation or cropping.
A robust rotationally invariant repeating-but-not-obviously micro watermark would be quite a neat trick.
- esperent 3y agoAn orthogonally rotational invariant watermark would cover 90%+ of real world image transforms - think flips, mirrors, and 90 degree rotations - and would probably be much easier to create.