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As the internet is rapidly evolving, communication technologies have become insecure, so several techniques is produced to solve this issue. The digital watermark technique is one of these techniques which provides the protection of property rights. This paper present a technique for image watermarking images that aim to improve the degree of robustness of the watermarking system against noise attacks, also to enhance the quality of the watermark image. In addition, logistic map chaotic is used in this technique to make sure the watermark image where the watermark is available only to a authorize user. This scheme is considered as a blind scheme for both cover image and watermark. Firstly, the watermark logo is encrypted with the logistic map chaotic and then encoded into a string of binary values, the secret image is embedded within another image, i.e. cover image by decomposition of the host image using Haar wavelet transform. The experimental results of the presented work indicate that elevated values of imperceptibility have been indicated via MSE and PSNR parameters. The robustness of image watermark have been evaluated via NC, also it has been indicated for having high robustness against attacks.

BLIND ROBUST WATERMARK BASED ON CHAOTIC MAP AND FREQUENCY TRANSFORM IN A COLORED IMAGE