A. Latif

E. Kokabifar, G. B. Loghmani, A. Latif

In this paper, we present methods for image compression on the basis of eigenvalue decomposition of normal matrices. The proposed methods are convenient and self-explanatory, requiring fewer and easier computations as compared to some existing methods. Through the proposed techniques, the image is transformed to the space of normal matrices. Then, the properties of spectral decomposition are dealt with to obtain compressed images. Experimental results are provided to illustrate the validity of the methods.

E. Kokabifar, G. B. Loghmani, A. Latif

This paper presents techniques for digital image watermarking based on eigenvalue decomposition of normal matrices. The introduced methods are convenient and self-explanatory, achieve satisfactory results, as well as require less and easy computations compared to some current methods. Through the proposed methods, host images and watermarks are transformed to the space of normal matrices, and the properties of spectral decompositions are dealt with to obtain watermarked images. Watermark extraction is carried out via a procedure similar to embedding. Experimental results are provided to illustrate the reliability and robustness of the methods.