Watermark interference is a threat to reliable detection in multiple re-watermarking scenarios. The impact of using disjoint frequency bands and/or different embedding domains in limiting those interferences is evaluated and compared. Employing disjoint frequency bands for embedding different watermarks turns out to be more effective and is capable of maintaining reasonable detection correlation in multiple embedding applications.

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The successive and segmented watermarking techniques are in the division of multiple watermarking techniques. The proposed method, comparison of multiple watermarking techniques by using discrete wavelet transforms. In successive watermarking technique, the watermarks are embedded one after the other. In segmented watermarking technique, one watermark is embedded into odd-numbered rows and another watermark is embedded into even-numbered rows. The extraction process multiple watermarks are extracted from the watermarked images. The proposed scheme shows good performance on original colour images in terms of imperceptibility. The segmented watermarking has better visual quality on watermarked image when compared with successive watermarking.

PP Restricted to other programme participants (including the Commission services) RE Restricted to a group specified by the consortium (including the Commission services) CO Confidential, only for members of the consortium (including the Commission services)

Abstract not found