Performing ANORLD Transform on Images

MATLAB 922B 245 views 0 downloads 1 credits
Tags:

Resource Overview

Applying ANORLD transform to images - during watermark embedding, preprocessing the watermark image with scrambling operations can effectively resist cropping attacks, with implementation involving Arnold cat map algorithms for pixel position permutation

Detailed Documentation

When performing ANORLD transform on images, additional security enhancement steps can be implemented. During the digital watermark embedding process, a preliminary scrambling operation can be applied to the watermark image before embedding, which increases the imperceptibility of the embedded watermark. This scrambling operation typically employs Arnold's cat map transformation algorithm that periodically permutes pixel positions through iterative coordinate transformations (x', y') = ((x + y) mod N, (x + 2y) mod N). Such preprocessing effectively resists cropping attacks by distributing watermark information across the entire image spatial domain, making the watermark more difficult to detect and remove. Therefore, incorporating these additional preprocessing steps significantly improves the security and robustness of image watermarking systems, with code implementation requiring careful parameter selection for transformation periodicity and iteration counts.

You May Also Like