A study for watermark methods appropriate to medical images

Cho, Yongho; Ahn, Bonghwan; Kim, Jae‐Seok; Kim, In-Young; Kim, Sun I.

doi:10.1007/bf03190332

Cited by 6 publications

(1 citation statement)

References 5 publications

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“…A digital signature is non-repudiation, encrypted version of the message digest extracted from the data. It is usually stored as a separate file, which can be attached to the data to prove integrity and originality [3] . Watermarking techniques consider the image as a communication channel.…”

Section: Introductionmentioning

confidence: 99%

Clinical Assessment of Watermarked Medical Images

Zain¹,

Fauzi²,

Aziz³

2009

J. of Computer Science

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Problem statement: Digital watermarking provides security to medical images. Watermarking in Region Of Interest (ROI) however distorts medical images but it is known that the resulting loss of fidelity is visually imperceptible. Approach: Clinical assessment will objectively evaluate the distortion on medical images to see whether or not medical diagnosis is altered. We used 75 medical images consisting of x-rays, ultrasound and CT scans. Digital watermarking was inserted in ROI and ROI/Region Of Non Interest (RONI) in all of them. Three assessors were randomly assigned 225 images, each receiving 75, a mixture of watermarked and non watermarked images. Results: Chi square test was used and p<0.05 was considered significant. There was no significant difference between original images and those watermarked in ROI or ROI/RONI. There was no comment on image quality in all the images assessed. Conclusion/Recommendations: Digital watermarking does not alter medical diagnosis when assessed by clinical radiologists. The quality of the watermarked images was also unchanged.

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Section: Introductionmentioning

confidence: 99%

Clinical Assessment of Watermarked Medical Images

Zain¹,

Fauzi²,

Aziz³

2009

J. of Computer Science

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Storage and Transmission of Cardiac Data with Medical Images

Acharya

Bhat

Niranjan³

et al.

Advances in Cardiac Signal Processing

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Efficient Storage and Transmission of Digital Fundus Images with Patient Information Using Reversible Watermarking Technique and Error Control Codes

et al. 2008

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Handling of patient records is increasing overhead costs for most of the hospitals in this digital age. In most hospitals and health care centers, the patient text information and corresponding medical images are stored separately as different files. There is a possibility of mishandling the text file containing patient history. We are proposing a novel method for the compact storage and transmission of patient information with the medical images. In this technique, we are using a reversible watermarking technique to hide the patient information within the retinal fundus image. There is a possibility that these medical images, which carry patient information, can get corrupted by the noise during the storage or transmission. The safe recovery of patient information is important in this situation. So, to recover the maximum amount of text information in the noisy environment, the encrypted patient information is coded with error control coding (ECC) techniques. The performance of three types of ECC for various levels of salt & pepper (S & P) noise is tabulated for a specific example. The proposed system is more reliable even in a noisy environment and saves memory.

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A study for watermark methods appropriate to medical images

Cited by 6 publications

References 5 publications

Clinical Assessment of Watermarked Medical Images

Clinical Assessment of Watermarked Medical Images

Storage and Transmission of Cardiac Data with Medical Images

Efficient Storage and Transmission of Digital Fundus Images with Patient Information Using Reversible Watermarking Technique and Error Control Codes

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