[Insight-users] Reading multiple images, writing one output

[Luis Ibanez]

Hi  Kathy,


            Welcome to ITK !!


You may want to start by reading the ITK Software Guide

      http://www.itk.org/ItkSoftwareGuide.pdf


and looking at the Tutorials:

     http://www.itk.org/HTML/Tutorials.htm


You will find instructions on how to do (3) in the
DataRepresentation chapter of the ITK Software Guide.

You will find instructions on how to do (4) and (5)
in the "Image Iterators" chapter of the Guide.


Examples on how to use the interpolators for resampling
are in the Section on "Geometrical Transformations", in
the Guide.


Please read this material, and let us know if you
have further questions,


    Thanks


       Luis



================================
smythek at u.washington.edu wrote:
> Hi Luis,
> 
> Thanks for the help, but I am a beginner to ITK and don't know how to do 
> 3,4,5.  I looked at the code you suggested and there are a lot of 
> methods and declarations that I haven't seen and that are not declared 
> in the file.  All the examples of interpolators are used in conjunction 
> with filters.  How do you just use a plain interpolator?
> 
> Does someone have an example of this I could look at since I am so very 
> confused?
> 
> Kathy
> 
>> 3) Fill the buffer with a zero (or a neutral value)
>>
>> 4) Create an iterator for visitig alll the pixels of image C, and
>>   map them into image A. Most of the pixels will fall outside of
>>   image A, and for those you simply don't do anything.
>>
>> 5) Create an iterator for visiting all the pixels of image C, and
>>   map them into image B (using the transform that resulted from
>>   the registration process.). Also here, most of the pixels will
>>   fall outside of image B.
>>
>>
>> At this point you will have composed image A and B into image C.
>>
>> Note that you may have to use an interpolator in order to get
>> intensity values from A and B.  The body of the loops in (4) and (5)
>> is almost identical to the loop in the GenerateData() methods of the
>> itkResampleImageFilter:
>>
>>
>>     Insight/Code/BasicFilters/
>>                      itkResampleImageFilter.txx
>>
>>
>> In lines 256-292.
>>
>>
>>
>> Examples on how to do (1) and (2) are available in the ITK Software
>> Guide in the "Data Representation" Chapter.
>>
>> A full description of the concepts of image resampling is presented
>> in the ITK Software Guide in section 6.9 "Geometric Transformations"
>> pdf-pages 254-285.
>>
>>
>>
>>
>>   Regards,
>>
>>
>>
>>      Luis
>>
>>
>>
>> =============
>> k s wrote:
>>
>>> Hi Luis,
>>>
>>> I read through all the examples, and I didn't see any that were close to
>>> what I want to do.  I want to take two inputs (from two readers), and 
>>> write
>>> them out to one output, where the second image overlaps the first by 
>>> some
>>> specified amount.  For example if image A were dimension [m,n] and B 
>>> were
>>> dimension [x,y], I want to make a composite of them of dimension [m+x-c,
>>> n+y-d] for some c and d.  I tried using an ImageIterator to do so, 
>>> but all I can do is write image A,
>>> and then write image B out below it, without the overlap.  [I simply 
>>> wrote
>>> out Image A while A's iterator was not AtEnd(), then wrote out B.]  To
>>> overlap the images, I tried to specify the SetPosition of my output
>>> Iterator, but got an error.  I am wondering if I should continue down 
>>> the
>>> Iterator path, or whether there are Copy/PasteRegion functions in itk 
>>> I am
>>> not aware of.
>>>
>>> Thanks!
>>>
>>> Kathy
>>>
>>> -----Original Message-----
>>> From: Luis Ibanez [mailto:luis.ibanez at kitware.com] Sent: Wednesday, 
>>> May 10, 2006 6:00 AM
>>> To: smythek at u.washington.edu
>>> Cc: insight-users at itk.org
>>> Subject: Re: [Insight-users] Reading multiple images, writing one output
>>>
>>>
>>> Hi Kathy,
>>>
>>> Please take a look at the examples in the ITK Software Guide,
>>> in the chapter "Reading and Writing Images".
>>>
>>> You will find the source code in the directory:
>>>
>>>
>>>           Insight/Examples/IO
>>>
>>>
>>>
>>> Regards,
>>>
>>>
>>>      Luis
>>>
>>>
>>>
>>> -------------------------------------
>>> smythek at u.washington.edu wrote:
>>>
>>>> Hi,
>>>>
>>>> I'm trying to write multiple inputs to one output.  I thought the 
>>>> itkImageSeriesReader paired with a writer would work, but I get an 
>>>> obscure error when I try to run the program.  Is there another way 
>>>> to do this?
>>>>
>>>> Kathy
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> Insight-users mailing list
>>>> Insight-users at itk.org
>>>> http://www.itk.org/mailman/listinfo/insight-users
>>>>
>>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
> 
> 
> 
>