[Insight-users] Questions about ImageRegistrationMethod - How tokeep user-defined image origin?

[Fucang Jia]

Hi, Jian,

Because m_Metric->GetFixedImage() return a constant object which could not be changed, the origin could not be set.
HTH,
Fucang


  



On 2006-06-26 11:19:21 Jian Wu
Subject:    [Insight-users] Questions about ImageRegistrationMethod - How tokeep user-defined image origin?

Dear ITK users:

I'm working on a 2D-3D image registration projection. The input 2D image has a user-specified image origin. The origin was set by using the following code.

    imageReader2D->GetOutput()->SetOrigin( origin2D); 

The change was successful and it has been verified in debugging. However, I noticed the origin was slightly changed by the code during the initialization of the registration. That was happened in Line 210 in itkImageRegistrationMethod.txx (version 1.24). The code is

    m_Metric->Initialize();

I also noticed the author did try to recover the user-specified orgin in the code immediately following above one.

  // Recover user-defined image origin 
  const short Dimension = GetImageDimension<FixedImageType>::ImageDimension;
  double fixedOrg[Dimension];
  for(int i = 0; i < Dimension; i++)
    fixedOrg[i] = fixedOrigin[i];
  //m_FixedImage->SetOrigin(fixedOrg); 
  //m_Metric->GetFixedImage()->SetOrigin(fixedOrg);

I don't know why the last two lines were commented out. I removed the comment characters and recomplied the codes. But I got the following compiling errors. 

error C2663: 'itk::ImageBase<VImageDimension>::SetOrigin' : 3 overloads have no legal conversion for 'this' pointer
        with
        [
            VImageDimension=3
        ]

I'm using Microsoft Visual C++ 2005 standard edition and Window XP professional. 

Any help and suggestions will be appreciated!

Jian Wu
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