[Insight-users] Segmentation question

[µ/*CT*/ser]

µ/*CT*/ser wrote:
> 
> Hi
> 
> Maybe i´m late and/or this may not serve you, but anyway i´m gonna suggest
> you to invert the pixel values in order to get the pixels of low value
> segmented as if they were of high value.
> 
> 
> 	OtsuThresholdImageFilterType::Pointer    otsuFilter    =
> OtsuThresholdImageFilterType::New();
> 
> 	otsuFilter->SetInsideValue(255);
> 	otsuFilter->SetOutsideValue(0);
> 
> kind regards.
> 
>  
> 
> devil20 wrote:
>> 
>> Hi
>> 
>> I tried already with otsu method but it gives me outer region of object
>> because there is large area of white pixels and only small area of this
>> black defects.
>> 
>> Any suggestion for the change in otsu method to ignore white area ?
>> 
>> Alex
>> 
>>  
>> 
>> From: Sergio Vera 
>> Sent: Tuesday, January 10, 2012 7:02 PM
>> To: alex Dowson 
>> Cc: itk ; Luis Ibanez 
>> Subject: Re: [Insight-users] Segmentation question
>> 
>> Look for otsu method. 
>> http://www.itk.org/Doxygen/html/classitk_1_1OtsuThresholdImageFilter.html  
>> or its cousin
>> http://www.itk.org/Doxygen/html/classitk_1_1OtsuMultipleThresholdsCalculator.html 
>> 
>> It should be pretty straightforward, looking at that image.
>> 
>> Best regards
>> 
>> 
>> On Tue, Jan 10, 2012 at 1:49 PM, alex Dowson <alexdowson at hotmail.com>
>> wrote:
>> 
>>   Hi
>> 
>>   I am doing MicroCT application using ITK.  I want detecting defects in
>> material with automatic threshold. Please check attached image that I
>> shown two defects in materials.
>> 
>>   My question is using which filters I can detect this defects ?  I tried
>> with LabelImage but it need threshold as input. I want to do automatic
>> segmentation of this defects.
>> 
>> 
>>   Any help will be appreciated ...
>> 
>> 
>>   Alex
>> 
>> 
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>> 
>> 
>> 
>> 
>> 
>> -- 
>> Sergio Vera
>> 
>> Alma IT Systems
>> C/ Vilana, 4B, 4º 1ª
>> 08022 Barcelona
>> T. (+34) 932 380 592
>>  www.alma3d.com
>> 
>> _____________________________________
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>> 
>> Visit other Kitware open-source projects at
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>> 
>> Kitware offers ITK Training Courses, for more information visit:
>> http://www.kitware.com/products/protraining.html
>> 
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> 
> 

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