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fire-keeper / BlindWatermark

使用盲水印保护创作者的知识产权using invisible watermark to protect creator's intellectual property
GNU General Public License v3.0
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Scaling robustness #25

Open skinkie opened 3 years ago

skinkie commented 3 years ago

When an input image is scale towards a different dimension (even remaining aspect ratio) the software is unable to extract the watermark. But when the image is scaled back to its original dimension (even being blurry) the watermark can be recovered. Would there be a way to be scale invariant? For example by using features such as SIFT/SURF/ORB as landmarks for embedding?

3zhang commented 2 years ago

Since you know the original dimension, you can scale back before extraction.