Tag: quantization technique

Discrete Wavelet Transform Method: a New Optimized Robust Digital Image Watermarking Scheme

In this paper, a wavelet-based logo watermarking scheme is presented. The logo watermark is embedded into all sub-blocks of the LLn sub-band of the transformed host image, using quantization technique. Extracted logos from all sub-blocks are mixed to make the extracted watermark from distorted watermarked image. Knowing the quantization step-size,