View source for Documentation/Nightly/FAQ/Scripting

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== How to grab full slice image (+-volume, +-model) ? ==

=== A Few General Approaches ===

There are multiple ways to access image data from one or all of the slice views.  

==== VTK Window to Image Function  (vtk.vtkWindowToImageFilter() ====

: #   Example to grab image from red slice view and output as TIF

: lm = slicer.app.layoutManager()
: redWidget = lm.sliceWidget('Red')
: redView = redWidget.sliceView()	
: wti = vtk.vtkWindowToImageFilter()
: wti.SetInput(redView.renderWindow())
: wti.Update()
: w = vtk.vtkTIFFWriter()
: w.SetInputConnection(wti.GetOutputPort())
: w.SetFileName('tmp/test.tif')
: w.Write()

==== Direct access to widget data using ====

: #    Example grabs image from red slice view and outputs as PNG

: lm = slicer.app.layoutManager()
: redWidget = lm.sliceWidget('Red')
: im = redWidget.imageData()
: w = vtk.vtkPNGWriter()
: w.SetInput(im)
: w.SetFileName('tmp/test.png')
: w.Write()


==== QImages using the qt.QPixmap.grabWidget function ====
      
: #   example to grab all views and store in 'image'
          image = qt.QPixmap.grabWidget(slicer.util.mainWindow()).toImage()

: #   example to grab 3d view, store in tdv, then output as a png image file
          tdv = lm.threeDWidget(0).threeDView()
          qt.QPixmap().grabWidget(tdv).toImage().save('/tmp/test.png')

=== Notes ===

This is also useful for slicing up whatever is shown (eg. voxelizing model data) by iterating this over the dimensions of the volume/model 

In order to view models in the slice view make sure to activate the "Slice Intersections Visible" property of the model


=== Specific Example ===

The following script iterates through the red slice view and outputs each slice as a .png image.  
It was originally designed to output volume+model data together slice-by-slice

: https://gist.github.com/gortscizz/5060517