[Insight-users] Simple-ITK installation Tutorial for C#
Bradley Lowekamp
blowekamp at mail.nih.gov
Mon Jun 18 18:09:35 EDT 2012
You need to extract a component from the vector image, not just a simple cast.
The name of the filter you need is VectorIndexSelectionCast.
http://www.itk.org/SimpleITKDoxygen/html/classitk_1_1simple_1_1VectorIndexSelectionCastImageFilter.html
On Jun 18, 2012, at 5:08 PM, Federico Lopez Bertoni wrote:
> Dan,
>
> Thanks for the reply.
>
> Your advice did help me out. I'm able to run SimpleITK with C#. I still have a couple of
> questions for you since I'm stuck in another place now.
>
> 1. When I try to run the example below I get the following error:
>
> sitk::ERROR: Pixel type: vector of 8-bit unsigned integer is not supported in 2D byclass
> itk::simple::BinaryThresholdImageFilter
>
> I understand that the file I'm reading (a regular PNG) is a 8-bit unsigned integer
> vector and that I need to cast it to some type that the filter supports.
>
> I try this:
> var testImage = SimpleITK.Cast(input, PixelIDValueEnum.sitkUInt8.swigValue);
>
> and get the following error:
>
> Exception thrown in SimpleITK Cast: C:\Users\Bradley
> Lowekamp\Documents\Source\SimpleITK\Code\BasicFilters\src\sitkCastImageFilter.cxx:75:
> sitk::ERROR: Filter does not support casting from casting vector of 8-bit unsigned
> integer to 8-bit unsigned integer
>
> Sorry if the question is a little basic, but I can't get it to run/cast my images.
>
> 2. Is it ok for me to post your response in the stackoverflow site?
>
> Thanks again for the help,
>
> Federico
>
>
>
> On Sat, 16 Jun 2012 11:36:58 +0930, Dan Mueller wrote
>> Hi Federico,
>>
>> The error you are receiving gives the hint:
>> "An attempt was made to load a program with an incorrect format."
>>
>> This error occurs when a .NET program tries to access functions in a
>> dll which was built using a different architecture; see for example
>> here:
>> http://blogs.msdn.com/b/arvindsh/archive/2009/06/21/tip-of-the-day-an-
>> attempt-was-made-to-load-a-program-with-an-incorrect-format-net-p-invoke-issue.aspx
>>
>> The easiest way to resolve this is to use the same building settings
>> as SimpleITK. For example, if you downloaded
>> "SimpleITK-0.4.0-CSharp-Win64-anycpu.zip" then your calling program
>> should be built with x64 AnyCPU settings. If you downloaded
>> "SimpleITK-0.4.0-CSharp-Win32-x86.zip" you should use x86 Win32
>> settings.
>>
>> To answer your other question: you only need to add
>> "SimpleITKCSharpManaged.dll" to your program references, but
>> "SimpleITKCSharpNative.dll" must be in the probe path (the easiest way
>> of achieving this is to put it in your binary directory next to your
>> program executable and the managed dll). This is explained at the
>> following page (this page is for Linux, but the same approach is
>> needed for Windows also):
>>
> http://www.itk.org/Wiki/ITK/Release_4/SimpleITK/GettingStarted/Visual_guide_to_building_
> on_Linux#A_simple_C.23_program
>>
>> Please let us know how you get on.
>>
>> HTH
>>
>> Cheers, Dan
>>
>> On 15 June 2012 23:33, Federico J. Lopez Bertoni <fjlb at pol.una.py> wrote:
>>> Hi,
>>>
>>> I'm transcribing my post on stackoverflow where I couldn't get any
>>> help. http://stackoverflow.com/questions/10826487/simple-itk-installation-tutorial-
> for-c-sharp
>>>
>>> I've used ITK with c++ some time ago and I'm trying to use simple itk in c#
>>> now. I've looked at the MICCAI 2011 tutorial and I'm trying to get started.
>>> I'm using a Windows 7 64 bit machine and Visual Studio Ultimate 2010.
>>> According to this wiki I should be able to just unzip and reference the
>>> .dlls to my project and it should be working. I'm able to add the
>>> SimpleITKCSharpManaged.dll to my references. However I'm not able to add the
>>> SimpleITKCSharpNative.dll to my references. It gives me the error: Please
>>> make sure the file is accesible, and that it is a valid assembly or COM
>>> component.
>>>
>>> I then try to run a simple console app
>>>
>>> using System;
>>>
>>> using System.Collections.Generic;
>>>
>>> using System.IO;
>>>
>>> using System.Linq;
>>>
>>> using System.Text;
>>>
>>> using itk.simple;
>>>
>>>
>>> namespace TestSimpleItk
>>>
>>> {
>>>
>>> class Program
>>>
>>> {
>>>
>>> static void Main(string[] args)
>>>
>>> {
>>>
>>> string inputFilename = "001.png";
>>>
>>> if (File.Exists(inputFilename))
>>>
>>> {
>>>
>>> try
>>>
>>> {
>>>
>>> var input = SimpleITK.ReadImage(inputFilename);
>>>
>>> var binary = SimpleITK.BinaryThreshold(input, 100, 255,
>>> 255, 0);
>>>
>>> SimpleITK.WriteImage(binary, "cthead1-binary.png");
>>>
>>> }
>>>
>>> catch (Exception ex)
>>>
>>> {
>>>
>>> Console.WriteLine("{0}", ex);
>>>
>>> }
>>>
>>>
>>> }
>>>
>>> else
>>>
>>> {
>>>
>>> Console.WriteLine("File '{0}' does not exist",
>>> inputFilename);
>>>
>>> }
>>>
>>> }
>>>
>>> }
>>>
>>> }
>>>
>>>
>>> The exception thrown is: {"The type initializer for
>>> 'itk.simple.SimpleITKPINVOKE' threw an exception."} and the inner exception
>>> is: {"An attempt was made to load a program with an incorrect format.
>>> (Exception from HRESULT: 0x8007000B)"}
>>>
>>> I've tried to copy the SimpleITKCSharpNative.dll to my bin/debug directory
>>> and I'm still getting the same error.
>>>
>>> Any ideas on how to solve this, or how to get SimpleItk up and running
>>> without actually building it locally from the source code using CMAKE?
>>>
>>> Thanks
>>>
>>>
>>> Federico
>
>
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