Energy Based Wavelet Domain Medical Image Watermarking
|K.Anusudha1 and N.Venkateswaren2
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Modern healthcare systems are based on managing diagnostic information of patients in a digital way. To guarantee the security, authenticity and management of medical images and information through storage and distribution, the watermarking techniques are used. This paper aims at developing a watermarking technique in wavelet domain which uses the Electronic Health Record (EHR) as watermark and hospital logo as the reference image. Embedding of the EHR data is based on energy band selection and in reference to the bit location in the reference image. Performance of the proposed method was tested for four modalities of medical images; MRA, MRI, Radiological, and CT. Simulation results show no visible difference between the watermarked and the original image. Moreover, the proposed watermarking method is robust against a wide range of attacks such as JPEG compression, Gaussian noise addition, histogram equalization, contrast adjustment, sharpening and rotation.