Robust Reversible Colour Image Digital Watermarking Using Offset Coefficient Technique
By using offset coefficient of a host block, we design a robust reversible digital watermarking for color images. Based on pixel-value-offset of a host block, a watermark can be effectively embedded in a host image without noticeable visual distortion. Experiments indicate that the perceived quality generated by the proposed method is good while the payload size is superior to existing techniques. Moreover, the marked images generated by our method are resisting from manipulations such as brightness, contrast, color quantization, equalized, (edge) sharpening, inversion, JPEG, JPEG2000, noise additions, pixel-truncation, and winding.
KeywordsData hiding Color image digital watermarking Offset coefficient
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