Digital Watermark Embedding Algorithm with Discrete Cosine Transform

MATLAB 1K 211 views 0 downloads 1 credits
Tags:

Resource Overview

A digital watermark embedding algorithm utilizing Discrete Cosine Transform (DCT) with improvements over conventional approaches, implementing frequency-domain coefficient modification through quantization-based embedding

Detailed Documentation

This paper introduces a novel digital watermark embedding algorithm that enhances previous methods by leveraging Discrete Cosine Transform (DCT) technology. The proposed algorithm employs DCT coefficient quantization where watermark bits are embedded by modifying middle-frequency coefficients to balance robustness and visual imperceptibility. Implementation involves partitioning the host image into 8×8 blocks, applying DCT transformation, and embedding watermark data through quantization index modulation. This improved approach enables more precise watermark embedding while maintaining integrity and reliability during extraction. The algorithm's core functionality includes adaptive threshold selection for coefficient modification and error correction coding for enhanced robustness. Research and application of this algorithm hold significant importance for digital copyright protection and information security, particularly in multimedia content authentication systems.

You May Also Like