[ITK-users] SimpleITK | BinaryMorphologicalClosing, filter noise

[Bradley Lowekamp]

Hello,

This is likely due to how you are defining a binary image.

SimpleITK has the established convention that for binary images/ masks, that 0 are the background and 1 is the foreground [1]. This is reflected in the default parameters of many filters, including the binary morphological filters.

Most likely you need to check the value of the ForegroundValue.

HTH,
Brad

[1] http://www.itk.org/SimpleITKDoxygen/html/ConventionsPage.html

On May 7, 2015, at 11:10 AM, Wookyung An <aqualiquid1 at gmail.com> wrote:

> Hi ITK users, 
> 
> I am pretty fresh of SimpleItk. I tried to use BinaryMorphologicalClosing to filter some noises that are smaller than the structuring element. I noticed that the default kernel type is "ball" which is ok. However, after I applied the function, there is no change at all.
> For example, I tried to filter which smaller than 10(radius).
> after_morp = SimpleITK.BinaryMorphologicalClosing(binarized_img, 10); 
> 
> 
> 
> But I found that nothing changed at all. Do you have any idea what was the problem?
> 
> 
> 
> Thank you in advance.
> 
> 
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