watermarking medical image 3d
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Hello, can any one help me to with a malab code that help me watermarking a medical image with 3 dimensions (3d) ana thanks
2 commentaires
Peter Eze
le 10 Mar 2017
Actually I am interested in this too. However, I think we need to treat 3-D medical image as several 2-D slices. We might just replicate the method used for 3-D. I have not written actual codes for 3-D.
Walter Roberson
le 10 Mar 2017
Peter Eze,
We have to ask again what the real purpose is? What problem is attempting to be solved?
Réponses (3)
Walter Roberson
le 14 Mar 2012
I would be worried about the watermark affecting the diagnostic quality of the image.
The people who proved that JPEG could be used acceptable for bone x-rays had to go through a series of blind tests with highly-skilled x-ray image readers in order to prove that there was a safe level of lossy image compression for their purposes. Without those concerted peer-reviewed studies, lossy JPEG would still be banned for clinical use.
What is the purpose of watermarking a medical image when you could instead watermark the DICOM headers?
3 commentaires
Image Analyst
le 30 Avr 2012
That contradicts what Walter said. Not sure who is right. Maybe it depends on the jurisdiction.
Walter Roberson
le 8 Juin 2012
Reference:
Quality assessment of DSA, ultrasound and CT digital images compressed with the JPEG protocol. Demetrios Okkalides and Stavros Efremides. Phys. Med. Bio. 39 (1994) 1407-1421
Stephen
le 14 Mar 2012
Do you mean the image is several 2-d slices or the actual composite into voxels? either way, I imagine you'd have to alter the intensity values to create your watermark somewhere in the background of the image. Try drawing something in mspaint or have your logo and creating a binary image from that with the same dimension as your image, then directly add it to the existing intensity data and scale it until it reasonably appears. There's probably something out there that does this for you though. good luck
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slama najla
le 29 Avr 2012
3 commentaires
Image Analyst
le 6 Mai 2012
I'd suggest you search the vision bibliography (http://iris.usc.edu/Vision-Notes/bibliography/contents.html) or internet for watermarking. I could be wrong but I don't think theft of medical images is prevalent, such that you need to watermark images and then try to get digital copies of your stolen images and try to see if they have your watermark in them. First of all, where is the profit motive for people to steal your images? How will they make money off them? Secondly using/stealing medical images without permission of the patient and medical practice violates privacy laws (HIPPA in the US) and there are substantial penalties. Thirdly, image owners should have safeguards in place to prevent theft or unauthorized use of images. So with all that, can you tell me how much of a problem this is?
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