Affine-Invariant Image Watermarking Using the Hyperbolic Chirp
| Autor: | Peter Fletcher, Stephen James Hardy, Kieran G. Larkin |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Radon transform
business.industry Data_MISCELLANEOUS ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Digital image Robustness (computer science) Computer Science::Multimedia Chirp Computer vision Affine transformation Artificial intelligence business Digital watermarking Image restoration Computer Science::Cryptography and Security Mathematics Feature detection (computer vision) |
| Zdroj: | DICTA |
| DOI: | 10.1109/dicta.2009.12 |
| Popis: | Image watermarking is the robust, imperceptible embedding of a small quantity of data into a digital image, and the subsequent recovery of this data, perhaps after the watermarked image has been distorted. We present a new watermarking technique which is robust to many image distortions, in particular arbitrary affine transformations of the image. The method achieves its robustness through the use of one-dimensional chirp functions. An affine-invariant detection method exists for such functions using a Radon transform, yet they are not detected trivially by a malicious attacker. The method also provides a way to determine any affine transformation applied to the watermarked image by using an affine-invariant property of groups of intersecting lines. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|