[vtkusers] about vtkGDCMImageReader

[Lic. José M. Rodriguez Bacallao]

well, digging around I have found vtkImageDataStreamer but it seems
that doesn't work with vtkGDCMImageReader. Does vtkGDCMImageReader
support streaming? How to do streaming with vtk and gdcm readers?

this is a testing code, what is wrong here:

import vtk, vtkgdcm
from imagis.dicom.utils.series_scanner import SeriesScanner
from imagis.dicom.utils.series_sorters import IPPSorter
from imagis.vtk.utils import to_vtk_string_array

scanner = SeriesScanner()
scanner.scan('/home/jmrbcu/temp/dicom/BRAIN')
files = scanner.series[0].files

sorter = IPPSorter()
sorted_files = sorter.sort(files)

reader = vtkgdcm.vtkGDCMImageReader()
reader.SetFileNames(to_vtk_string_array(sorted_files))
reader.UpdateInformation()

imageStreamer = vtk.vtkImageDataStreamer()
imageStreamer.SetInputConnection(reader.GetOutputPort())
imageStreamer.SetNumberOfStreamDivisions(8)
imageStreamer.UpdateInformation()
imageStreamer.GetExtentTranslator().SetSplitModeToBlock()

color_mapper = vtkgdcm.vtkImageMapToWindowLevelColors2()
color_mapper.SetInputConnection(imageStreamer.GetOutputPort())

actor = vtk.vtkImageActor()
actor.SetInput(color_mapper.GetOutput())

renderer = vtk.vtkRenderer()
renderer.AddActor(actor)

rwi = vtk.vtkRenderWindowInteractor()
rw = vtk.vtkRenderWindow()
rwi.SetRenderWindow(rw)

rw.AddRenderer(renderer)
rw.Render()

rwi.Initialize()
rwi.Start()

PS: changing the reader from the vtkGDCMImageReader to this it seems to work.

reader = vtk.vtkImageReader()
reader.SetDataByteOrderToLittleEndian()
reader.SetDataExtent(0, 63, 0, 63, 1, 93)
reader.SetDataSpacing(3.2, 3.2, 1.5)
reader.SetFilePrefix("/home/jmrbcu/installs/development/c/vtk/5.4.2/VTKData/Data/headsq/quarter")
reader.SetDataMask(0x7fff)

On 1/28/10, Lic. José M. Rodriguez Bacallao <jmrbcu at gmail.com> wrote:
> hi folks, right now I am using vtkGDCMImageReader to read series of
> images, until now, everything is ok but one small problem (I think
> this is an small problem). When I try to read a serie of images, the
> reader load all of my images at one time and, if the serie is a big
> one, it may take time to load, then I show the images using vtk. The
> problem I am facing is that I need to show images even if the complete
> serie is not completly loaded at that time(this is a user
> requirement), I need to show the images already loaded by the reader,
> something like a streamed reader that if has loaded one image, the
> display it and continue loading the rest. Is this posible?
>
> PS: sorry for my english.
>
> --
> Lic. José M. Rodriguez Bacallao
> Centro de Biofisica Medica
> -----------------------------------------------------------------
> Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo
> mismo.
>
> Recuerda: El arca de Noe fue construida por aficionados, el titanic
> por profesionales
> -----------------------------------------------------------------
>


-- 
Lic. José M. Rodriguez Bacallao
Centro de Biofisica Medica
-----------------------------------------------------------------
Todos somos muy ignorantes, lo que ocurre es que no todos ignoramos lo mismo.

Recuerda: El arca de Noe fue construida por aficionados, el titanic
por profesionales
-----------------------------------------------------------------