Explore MATLAB source code curated for "dct系数" with clean implementations, documentation, and examples.
Implementation of a digital watermarking algorithm based on DCT coefficients in MATLAB environment, featuring frequency-domain embedding techniques and configurable robustness parameters
A video watermark embedding program based on DCT coefficients that reads YUV files, extracts multiple frames, performs DCT transformation on each frame, modifies mid-low frequency coefficient values, applies inverse DCT, and reconstructs frames into YUV format for playback.
Image Steganography and Digital Watermarking. Implements spatial domain hiding by embedding data in the least significant bits (LSB) of each pixel. Also employs DCT coefficient manipulation for information attachment.
1. First, implement Discrete Cosine Transform (DCT) to eliminate data redundancy through frequency domain conversion; 2. Quantize DCT coefficients using predefined quantization tables with adjustable compression ratios; 3. Apply Huffman encoding to quantized coefficients for entropy reduction. The complete implementation consists of a main program coordinating two subroutines: DCT Quantization and Huffman Encoding modules.
MATLAB-based face recognition program utilizing Hidden Markov Models (HMM), implementing DCT coefficients as facial recognition features with optimized feature extraction algorithms