[Rtk-users] Forward Projection

[vincent]

Hi Yoonho,

my guess would be that FWDType possesses a SetInput method, from what  I 
understand from the inheritance diagram.

Also make sure to define a geometry using an instance 
ofrtk.ThreeDCircularProjectionGeometry.

I encourage you to have a look at the class documentation: 
http://www.openrtk.org/Doxygen/classrtk_1_1ForwardProjectionImageFilter.html

Hope it helps,

best regards,

Vincent

On 27.04.20 09:59, 나윤호 wrote:
> Hi I'm trying to make an sinogram of shepp logan phantom.
>
> But I don't know how to do it using RTK...
>
> Do I need to define geometry for this?
>
> Here's what I did so far
>
>
> image = itk.imread('C:\\Users\\USER\\Jupyter 
> Notebook\\ITK-RTK\\shepp_logan_phantom.png', itk.F)
> array = itk.array_from_image(image)
> expand = np.expand_dims(array, axis=2)   # just to make it into 3 
> dimension ( ForwardProjectionImageFilter only supports 3D )
> expand = itk.image_from_array(expand)
>
> ImageType = itk.Image[itk.F,3]
>
> FWDType = rtk.ForwardProjectionImageFilter[ImageType, ImageType]
> fwd = FWDType.New()
>
>
> For the last line I have tried both
>
> fwd = FWDType.New(expand)   ---> AttributeError: No method found to 
> set the input.
> and
> fwd = FWDType.New(Input = expand)    ---> AttributeError: 'itkObject' 
> object has no attribute 'SetInput'
>
> they both had error like this.
>
> How can I make an sinogram of shepp logan phantom?
>
>
> Yoonho.
>
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