RE: [WM]: Allowable operations on medical images

["Mohammad Awrangjeb" <g0201721@nus.edu.sg>]

Sorry, I wanted to know what are the allowable operations (may be attacks: scaling, rotation,...) on medical images when we use
watermarking for content authentication (fragile watermarking) and ownership proof (robust watermarking)?
 
Awrangjeb
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	-----Original Message----- 
	From: Randleff, Lars [mailto:LRRANDLEFF@bksv.com] 
	Sent: Mon 3/3/2003 5:00 PM 
	To: Mohammad Awrangjeb; watermarking@watermarkingworld.org 
	Cc: 
	Subject: RE: [WM]: Allowable operations on medical images
	
	

	Hi Awrangjeb
	
	These are my suggestions (written for non-watermarkers). If you add to list,  would you please send me the additions?
	
	Lars
	
	-----------
	The requirements to steganographic methods should be established before applying steganography to medical imaging. Some
requirements are:
	
	* Medical information in an image should remain valid. It is necessary to change the image data to embed data into the
image. These changes should not change the perception of the image. If a steganographic method changes the diagnosis based on a
medical image, neither the image nor the steganographic method is usable.
	
	* Steganography must preserve the quality of images.  The medical staff must have confidence in what they see, when using
medical images with hidden data. It is therefore essential that methods in use have successfully been tested on a large amount of
medical images.
	
	* Medical images come in a lot of different modalities, such as X-ray, CT, MT, and ocular fundus images. A method
complying with the requirements in one modality does not necessarily comply with requirements in other modalities. Therefore the
steganographic method should be tested on all of the target modalities.
	
	* Commercial products now use algorithms on digital medical images to help the medical staff. A steganographic method
should not result in a different diagnosis when these algorithms are used on an image containing hidden data.
	
	* The field of medical imaging today has a number of standards in both image and data formats. The use of steganographic
methods should integrate with systems supporting these standards.
	
	* Steganographic methods should comply with the legislation within the field of medical imaging.
	
	
	
	
	-----Original Message-----
	From: Mohammad Awrangjeb [mailto:g0201721@nus.edu.sg]
	Sent: 3. marts 2003 05:28
	To: watermarking@watermarkingworld.org
	Subject: [WM]: Allowable operations on medical images
	
	
	
	Can anyone tell what are the required allowable operations (may be attacks) on medical images?
	Thanks in advance..
	
	Awrangjeb
	********
	


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