Introduction
MATLABSolutions demonstrate In this particular task, Color images have not received as much attention from the watermarking community as grey-level images. One commonly used technique to address color images is to mark only the luminance component. If on one hand this solution is practical due to implementation issues, on the other hand the luminance component represents the most perceptive and sensible information.
Methodology
Consequently for watermark-ing and especially data-hiding methods, it is important not to discard chrominance information because such a channel represents an interesting amount of data that can be used for information embedding. This paper is organised as follows: previous work on color image watermarking is first recalled. In the next section color images and color images transform are revisited using the hypercomplex representation and the Quaternion Fourier Transforms (QFT). In the next section a QFT is constructed considering human perception issues. A watermarking scheme using this transform is afterwards presented and evaluated. Finally concluding remarks outline the different issues of this work.
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What you’ll get
- MATLAB code and sample trajectory data
- SCARA kinematics and simulation files
- Short walkthrough video