[MINC-users] Classify

[Jon Erik Ween]

May I trouble the list with another question? (Guess I'll do so  
anyhow...)

So, I've created a tagfile with some classifications that seem  
reasonable, BUT, Display didn't seem to want to record tags with  
value"0", hence Background is labeled as CSF in the next step. What am  
I missing here?

I set the user_mask_value below to "0" as my mask is a lesion mask  
which I don't want to classify. (Picture1)

Then, I feed classify with the following:

bash-3.2$ classify -clobber -user_mask_value 0 -tagfile tags.tag -mask  
14017_083005_combo_lbl2_tal.mnc 14017_083005_3dvol_tal.mnc  
14017_083005_3dvol_cls.mnc

and get the attached output in Picture2.

This procedure still over-classifies grey matter volumes by including  
the lesion areas that I was trying to mask out. How come?

Cheers!

Jon

Soli Deo Gloria




On 26-Mar-09, at 10:14 AM, Jason Lerch wrote:

>
> On 26-Mar-09, at 10:10 AM, Claude LEPAGE wrote:
>
>>> That looks correct - and yes, the value does matter: you want it to
>>> be
>>> an integer which will give the corresponding value to the classified
>>> file. We usually use 0 for background, 1 for CSF, 2, for WM, 3 for
>>> GM.
>>> But that's merely convention - though a few scripts assume these
>>> values.
>>
>> Jason,
>>
>> Isn't it GM=2 and WM=3?
>
> Right you are - my bad.
>
>>
>>
>> Claude
>> _______________________________________________
>> MINC-users at bic.mni.mcgill.ca
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>
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>