Robust custom watermark algorithms?

1. What is robust watermarking algorithm?
2. Which algorithm is used in digital watermarking?
3. What is watermark algorithm?
4. What is robust and fragile watermarking?

What is robust watermarking algorithm?

Robust watermarking is the watermarking algorithm that can survive not only such general operations such as compression, adding noise, filtering, A/D or D/A conversion, and so forth, but also such geometric attacks such as rotation, scaling translation, shearing, and so forth. It is often used in ownership protection.

Which algorithm is used in digital watermarking?

The developed algorithm is a blind watermarking technique that meets the requirements of invisibility and robustness. Watermarking is performed by embedding a watermark in the middle-frequency coefficient block of three DWT levels. The PNN is used during watermark extraction.

What is watermark algorithm?

The algorithm is based on a special type of watermarking called reversible data hiding that guarantees the exact recovery of the original image after the embedded data have been extracted. The main advantages of using the frequency domain in the proposed algorithm are the high embedding capacity it provides.

What is robust and fragile watermarking?

Semifragile watermark is robust for acceptable content-preserving manipulations (compression, enhancement, etc.) whereas fragile watermark is robust for malicious distortions such as feature adding or removal. Therefore it is suitable to verify the trustworthiness of data.