A long standing goal within information security in broadcast monitoring has been the ability of the image watermark operation to be resilient to passive alterations that do not make the image inoperative for recovering hidden data. This question, known as watermark robustness, requires a consistent process to keep image feature unchanged, while allowing attachment of additional data in the image. This study investigates the potential for using steerable wavelets to specify essential image features in watermark operation. Four types of wavelets with gradient property were examined and evaluated to this end. Here, we use wavelets design based on the Riesz transform to investigate ability of recovering hidden data in host images associated with scaling and rotation after data insertion. We evaluate the invisibility of hiding operation and resilience of the hidden data again image scaling and rotation, which show feasibility and efficiency of the method.
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