Re: [WM]: medical image watermarking

["F Tushabe" <tushabe@cit.mak.ac.ug>]

it really depends on the reason for research. Mathematical morphological filtering has been used to filter out sickle cells, cells
infected with malaria parasites, it has been used to show some infected bones, to improve visibility in the veins/ arteries, to
locate tumours etc. 

in otherwords, the filtering operation can be used to highlight an aspect or attribute of the imgae which will be interpreted
meaninfully. 

florence 


diwu8@cs.tamu.edu writes: 

> 
> I am also hoping to know which image processing operations are allowed 
> with medical images for watermarking purposes, meaning that medical 
> images processed by these operations still preserve their qualities 
> for diagnosis?
> 
> If mathematical morphological filteringi is applied to images for 
> segmentation, it will change the images and the embedded watermarks. 
> Geomettric transformations (rotation, scaling and translation), on the 
> other hand, don't change the image content, and the watermark in the 
> image if the watermark is designed to be robust to these 
> transformations. The transformed images therefore, I think, can still 
> be used for original purposes.
> 
> Although the following distortions were tested for robustness of 
> watermking in some papers, I am not sure if it is reasonalbe to let a 
> watermarking system robust to them too, when watermarking medical 
> images?
> additive noise (salt-pepper, gaussian, etc); low-pass filtering 
> (gaussian, mean, etc); Jpeg compression (with different quality 
> factor); and/or others.
> 
> I am looking forward to hearing your comments. Thank you very much. 
> 
> Di
> 
> 
> Quoting F Tushabe <tushabe@cit.mak.ac.ug>: 
> 
>> these are very good questions. i would like to hear the answers.
>> What i know is that mathematical morphological filtering is veery 
>> popular in medical images.
>> florence Frank Luck writes:
>>> hi,
>>>   I am new in this field and I'll need your help.
>>> Does anyone know which image processing operations are allowed with 
>>> medical images? By this I mean on compression, filtering, geometric 
>>> distortion etc..
>>>  Which requirements should watermark satisfy  to be applied for 
>>> medical image watermarking?
>>> Thank you in advance,
>>>     Frank
>  


______________________________________________________________________________

Watermarking Mailing List - http://www.watermarkingworld.org/ml.html
To unsubscribe send email to "majordomo@watermarkingworld.org" with
"unsubscribe watermarking YOURMAIL" in the body.
______________________________________________________________________________