<div dir="ltr">Use GetScalarTypeAsString()<br><br>Jothy<br><br><div class="gmail_quote">On Wed, Sep 28, 2011 at 2:21 PM, speedy <span dir="ltr"><<a href="mailto:markenjodsalz@gmx.net">markenjodsalz@gmx.net</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Thanks a lot for your reply Dominique!<br>
It is much faster indeed to use GetScalarPointer() instead of iterating<br>
through the pixels. I still have a problem though: My class doesn't know the<br>
pixeltype of the image beforehand, but I have to cast the pointer to it. How<br>
can I achieve this? I know there's the method<br>
<br>
Image->GetScalarType(),<br>
<br>
but it returns an integer value and I don't know how to proceed with it..<br>
<br>
<br>
Dominique Töpfer wrote:<br>
><br>
> Hi,<br>
><br>
> a similar question was discussed here:<br>
> <a href="http://vtk.1045678.n5.nabble.com/Fast-element-access-of-vtkImageData-td4640137.html#none" target="_blank">http://vtk.1045678.n5.nabble.com/Fast-element-access-of-vtkImageData-td4640137.html#none</a><br>
><br>
> HTH<br>
> Dominique<br>
><br>
> On <a href="tel:27.09.2011%2015" value="+12709201115">27.09.2011 15</a>:47, speedy wrote:<br>
>> Sorry if this question actually has a simple answer, but what is the<br>
>> fastest<br>
>> way to set every pixel of a vtkImageData to zero (or any other value<br>
>> fitting<br>
>> in its pixeltype)?<br>
>> I've tried vtkImageThreshold, but it doesn't seem to do anything or maybe<br>
>> I<br>
>> am using it wrong:<br>
>><br>
>> threshold = vtkSmartPointer<vtkImageThreshold>::New();<br>
>> threshold->SetInput(Image);<br>
>> threshold->ReplaceOutOn();<br>
>> threshold->SetOutValue(Value);<br>
>> threshold->ThresholdByLower(maximum_image_value);<br>
>> threshold->Update();<br>
>><br>
>> --<br>
>> View this message in context:<br>
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><br>
><br>
> --<br>
> Thus spake the master programmer:<br>
> "After three days without programming, life becomes meaningless."<br>
><br>
> -- The Tao of Programming by Geoffry James<br>
><br>
> Dominique Töpfer, Dipl.-Inform.<br>
> Institute of Medical Physics<br>
> University of Erlangen<br>
><br>
> _______________________________________________<br>
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><br>
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<br>
<br>
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</blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr">Jothybasu K Selvaraj<br>PhD Student<br>University of Liverpool<br>Liverpool,UK<br></div><br>
</div>