Watermark Compression in Medical Image Watermarking Using Lempel-Ziv-Welch (LZW) Lossless Compression Technique

Autor: Siau-Chuin Liew, Jasni Mohamad Zain, Gran Badshah, Mushtaq Ali
Rok vydání: 2015
Předmět:
Health Information Exchange
Theoretical computer science
Teleradiology
Computer science
Data_MISCELLANEOUS
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION
ComputingMilieux_LEGALASPECTSOFCOMPUTING
Data_CODINGANDINFORMATIONTHEORY
02 engineering and technology
Lossy compression
Article
Image Interpretation
Computer-Assisted
0202 electrical engineering
electronic engineering
information engineering
Humans
Radiology
Nuclear Medicine and imaging
Computer vision
Digital watermarking
Computer Security
Lossless compression
Radiological and Ultrasound Technology
business.industry
Payload (computing)
020207 software engineering
Lempel–Ziv–Welch
Watermark
Data Compression
Computer Science Applications
020201 artificial intelligence & image processing
Artificial intelligence
business
Image compression
Data compression
Zdroj: Journal of Digital Imaging. 29:216-225
ISSN: 1618-727X
0897-1889
Popis: In teleradiology, image contents may be altered due to noisy communication channels and hacker manipulation. Medical image data is very sensitive and can not tolerate any illegal change. Illegally changed image-based analysis could result in wrong medical decision. Digital watermarking technique can be used to authenticate images and detect as well as recover illegal changes made to teleradiology images. Watermarking of medical images with heavy payload watermarks causes image perceptual degradation. The image perceptual degradation directly affects medical diagnosis. To maintain the image perceptual and diagnostic qualities standard during watermarking, the watermark should be lossless compressed. This paper focuses on watermarking of ultrasound medical images with Lempel-Ziv-Welch (LZW) lossless-compressed watermarks. The watermark lossless compression reduces watermark payload without data loss. In this research work, watermark is the combination of defined region of interest (ROI) and image watermarking secret key. The performance of the LZW compression technique was compared with other conventional compression methods based on compression ratio. LZW was found better and used for watermark lossless compression in ultrasound medical images watermarking. Tabulated results show the watermark bits reduction, image watermarking with effective tamper detection and lossless recovery.
Databáze: OpenAIRE
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