Re: [WM]: medical image watermarking

[diwu8@cs.tamu.edu]

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


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