[Insight-users] Simple-ITK installation Tutorial for C#

[Federico Lopez Bertoni]

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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