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A New Medical Image Watermarking Technique with Finer Tamper Localization
Arda Ustubioglu1, Guzin Ulutas2
1Computer Engineering Department, Karadeniz Technical University, Trabzon, Turkey. ardaustubioglu@ktu.edu.tr.
Journal of Digital Imaging
|March 1, 2017
Summary
This study introduces a novel medical image watermarking technique for enhanced integrity verification. The method accurately detects tampered regions in medical images using 4x4 blocks without region of interest restrictions.
Area of Science:
- Medical Imaging
- Information Security
- Digital Watermarking
Background:
- Medical imaging systems require secure transmission over networks.
- Existing watermarking techniques ensure image integrity but have limitations.
- Accurate detection of tampered regions is crucial for medical data authenticity.
Purpose of the Study:
- To propose a new medical image watermarking technique for improved tamper detection accuracy.
- To authenticate small 4x4 pixel blocks for finer tamper localization.
- To develop a method without restricting the region of interest (ROI) size.
Main Methods:
- Combines Modified Difference Expansion (MDE) and Least Significant Bit (LSB) embedding.
- Embeds authentication bits into corresponding 4x4 pixel blocks.
- Utilizes a small 4x4 window for marking tampered regions.
Main Results:
- The proposed method achieves high accuracy in detecting tampered regions.
- It successfully marks 4x4 blocks with even a single tampered pixel.
- Demonstrates finer accuracy and no ROI size restriction compared to existing methods.
Conclusions:
- The new watermarking technique offers superior tamper detection for medical images.
- It is applicable across all medical imaging modalities.
- Provides enhanced accuracy and flexibility for medical image authentication.
