Hybrid watermark techniques for skin cancer images
The aims of this study are to reveal the potentials of digital watermarking in medical datamanagement issues, and proposes a hybrid watermark technique for skin cancer to enforce integrity,authenticity and confidentiality of the medical information. Dermoscopic image dataset (PH2) wasused for testin...
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| Main Author: | |
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| Format: | thesis |
| Language: | eng |
| Published: |
2019
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| Subjects: | |
| Online Access: | https://ir.upsi.edu.my/detailsg.php?det=17 |
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| Summary: | The aims of this study are to reveal the potentials of digital watermarking in medical datamanagement issues, and proposes a hybrid watermark technique for skin cancer to enforce integrity,authenticity and confidentiality of the medical information. Dermoscopic image dataset (PH2) wasused for testing purpose, which includes 200 different images. The hybrid watermark is proposedbased on chaotic embedding. The hybrid watermarking includes robust and fragile watermarks embeddedin the region of non interest of the image. The robust watermark utilizes the discrete wavelettransform to hide the patient information in the frequency domain. The fragile watermark utilizesthe least significant bit to hide the authentication data in the spatial domain. The findings ofthis study shows high watermarked image quality and promising robustness under different attacks,and when compared with other techniques including discrete cosine transform and 2LSB. The PeakSignalto-Noise Ratio (PSNR) of the watermarked image is 37.64 dB and the Mean Square Error (MSE)is 36.7507 dB, which indicate good image equality. In general, the hybrid watermark did not degradethe image quality and enhanced medical data security and authentication. The proposed hybridwatermarking can help health organizations todeal with medical information effectively, especially during storage and transmission. |
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