[ITK-users] Ignore background pixels for gaussian filter computations

[Albert Gubern Mérida]

Thanks Matt! I was not aware of this filter. However, instead of masking an
image after filtering, I would like that the filter itself ignores a
specific region (i.e. background) for any calculation. Masking is not
enough if I apply large sigmas. I am also interested in making the filter
faster by ignoring computations in specified voxels.

Best,

Albert



On May 1, 2017 17:22, "Matt McCormick" <matt.mccormick at kitware.com> wrote:

> Hi Albert,
>
> The result could be masked. Here's an example of one approach:
>
>   https://itk.org/ITKExamples/src/Filtering/LabelMap/
> MaskOneImageGivenLabelMap/Documentation.html
>
> HTH,
> Matt
>
> On Mon, May 1, 2017 at 8:59 AM, Albert Gubern Mérida <
> agubernmerida at gmail.com> wrote:
>
>> Hi,
>>
>> I want to compute voxel features using Gaussian filters such as
>> LaplacianRecursiveGaussianImageFilter in breast x-ray images. However, I
>> get very strong responses at the skin line due to the large intensity
>> difference between tissue and backgound. I do have the segmentation of the
>> background. Is there anyway to exclude/ignore the background voxels from
>> the computation using a mask or setting a specific intensity value?
>>
>> Thanks!
>>
>> Best,
>>
>> Albert
>>
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