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This study presents a method of scheming colour image by using fuzzy watermarking through Discrete Wavelet Transform (DWT) and histogram stretching methods. This study aims further at achieving and developing robustness, imperceptibility and available capacity of cover image for the watermarked image, which can withstand against various attacks. Digital watermarking techniques are used to protect the copyrights of multimedia data by embedding secret information in the host media, for example, embedding in images, audios, or videos. Many watermarking techniques have been proposed in the literature to solve the copyright violation problems, but most of these techniques failed to satisfy both imperceptibility and robustness requirements. In this research, adaptive RGB colour image fuzzy watermarking technique is proposed. The host image is converted from RGB to YCbCr colour space to preserve imperceptibility and robustness, then, Cb component is extracted and partitioned into four quadrants. While the Histogram Stretching will be used to convert the Watermark image to 4-bits plan to preserve the capacity for watermarking.

Fuzzy Watermarking for Colour Images based on Fusion of Discrete Wavelet Transform (DWT) Technique and Histogram Stretching