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Published in:
2014 | OriginalPaper | Chapter
2DKLT-Based Color Image Watermarking
Author : Paweł Forczmański
Published in: Image Processing and Communications Challenges 5
Publisher: Springer International Publishing
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The paper presents a digital image watermarking algorithm realized by means of two-dimensional Karhunen-Loeve Transform (2DKLT). The information embedding is performed in the two-dimensional specturm of KLT. Employed two-dimensional approach is superior to standard, one-dimensional KLT, since it represents images respecting their spatial properties, resulting in a lower noise and better adaptation to the image characteristics. The principles of 2DKLT are presented as well as sample implementations and experiments, which were performed on benchmark images. We propose a measure to evaluate the quality and robustness of the watermarking process. Finally, we present a set of experiments related to the color-space, embedding variants and their parameters.The results show that the 2DKLT employed in the above application gives obvious advantages in comparison to certain standard algorithms, such as DCT, FFT and wavelets.