[Insight-users] Very Basic Questions

[Dženan Zukić]

Reader output is a pointer to in-memory container for pixels (metadata info
and pointer to array with actual pixel values, called pixel intensities).
This container is a class called itk::Image.

To do something with all pixels in an image you can use iterators, there are
many examples <http://itk.org/Wiki/ITK/Examples> about it. There is a filter
which applies a defined mathematical operation to all pixels in an image,
called UnaryFunctorImageFilter. See this
example<http://itk.org/Wiki/ITK/Examples/ImageProcessing/UnaryFunctorImageFilter>
.

The normal way to store some computed image values is in an instance of
itk::Image class.

HTH


On Tue, Sep 13, 2011 at 17:13, Abayiz <abayiz at yahoo.com> wrote:

> I know these questions are too much basic, but being a fresh, I have to
> make sure I understand them correctly at the early step, so here they are:
>
> 1. If I use itk to read a file, does that mean the reader output port gives
> me the pixel values of the image? or intensity values of pixels?
> 2. If I want to implement a kind of mathematical equation with itk, how do
> I perform the same computation for each pixel of the whole image? (I mean
> like a loop)
> 3. And, how can I store the computed values for the whole pixels for later
> use? (like making a kind of container to load each and every computation
> result for pixels, and use that container as the final result?)
>
> Since I am really fresh to implement mathematical equations in itk, these
> basic questions are crucial to me. Hope you won't be bothered with them.
>
> Waiting for helpful answers. Thanks in advance.
>
> Abayiz
>
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