[Insight-users] Simple registration question (ImageRegistartion1.cxx )

[marco giordano]

Thank you. I see also what is the cause...

Is there a way to avoid setting the defaultFixelValue to 100 and set it in a
way to complete the moving image (e.g. complete the image using the old
values of the moving image or some interpolated version of that). I really
do not have clear if this would be appropriate but I would like not to have
empty/flat spaces in my registered image because they make my slices
unusable for analysis.

I hope I explained me clear.

Thx

2010/9/28 Navneeth Subramanian <navneeth.s at gmail.com>

> The cause is seen in line 600:
> resampler->SetDefaultPixelValue( 100 );
>
> This is the value being applied during the interpolation of the moving
> image based on the computed transform.
> Change it & you're all set.
>
> best,
> navneeth
>
>
> On Sat, Sep 25, 2010 at 1:13 AM, marco giordano <marco.giord at gmail.com>wrote:
>
>> Yes, exactly the last slice of the registered image.
>>
>> Is there anyway to limit this effect?
>>
>> What if one adds empty slices on the lowest (highest) border? does that
>> affect the registration?
>>
>> Thx
>>
>>  2010/9/24 Kishore Mosaliganti <kishoreraom at gmail.com>
>>
>> By last image, did you mean the last slice of the registered (moving)
>>> image?
>>>
>>> If so, I think this is because of the image transform applied that
>>> moves the image totally out of that image plane. It will happen to the
>>> boundary slices usually.
>>>
>>> Kishore
>>>
>>> On Fri, Sep 24, 2010 at 10:56 AM, marco giordano <marco.giord at gmail.com>
>>> wrote:
>>> > Hi,
>>> >
>>> > I have a simple issue that I can not solve neither understand the cause
>>> of
>>> > it.
>>> >
>>> > I run the Example ImageRegistartion1.cxx on 2 3D CT images (256x256x11)
>>> > modyfing the code to take into account the third dimension and float
>>> number
>>> > for representation.
>>> >
>>> > Output looks like this:
>>> >
>>> > ....
>>> > 25 = 104.112 : [0.097946, -0.00159973, 0.00035025]
>>> > 26 = 104.082 : [0.0979543, -0.00155174, 0.000494857]
>>> > Result =
>>> >  Translation X = 0.0979543
>>> >  Translation Y = -0.00155174
>>> >  Translation Z = 0.000494857
>>> >  Iterations    = 28
>>> >  Metric value  = 104.135
>>> >
>>> > Registration runs succeffully but I notice in my registrated image that
>>> the
>>> > last slice (slice Number 11) is all set to the Deafult Value 100.
>>> >
>>> > Is that due to the interpolation or something I did not specify in my
>>> code?
>>> >
>>> > Is it possible to avoid this effect?
>>> >
>>> > Thank you very much.
>>> >
>>> >
>>> > --
>>> > M. Giordano
>>> >
>>> >
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>>
>>
>>
>> --
>> Marco Giordano
>>
>>
>> _____________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Kitware offers ITK Training Courses, for more information visit:
>> http://www.kitware.com/products/protraining.html
>>
>> Please keep messages on-topic and check the ITK FAQ at:
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>


-- 
Marco Giordano
MSN:gilmour812002 at yahoo.it <MSN%3Agilmour812002 at yahoo.it>
ICQ :285-118-610
SKYPE:marcogiord81
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