[vtkusers] Creating a 3D vtkStructuredPoints with a series of bmp images

[anast.jm at pg.com]

Thomas, try vtkImageLuminance instead of vtkImageExtractComponents  (or do you
only want one color channel???)  ......john


                                                                
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From: Thomas Deschamps <tdeschamps at lbl.gov>@public.kitware.com on 11/13/2002
02:28 PM PST
                                                                                              
   Thomas Deschamps <tdeschamps at lbl.gov>           To:   vtkusers at public.kitware.com          
                     @public.kitware.com           Cc:    (bcc: John Anast-JM/PGI)            
                                           Subject:      [vtkusers] Creating a 3D             
                                                vtkStructuredPoints with a series of bmp      
                                Sent by:        images                                        
       vtkusers-admin at public.kitware.com                                                      
                     11/13/2002 05:28 PM                                                      
                                                                                              
                                                                                              




Hi vtkUsers,

I have several bmp images which represent slices of the same volume.
I would like to create a vtkStructuredPoints with all these files, but
with the following code I obtain a 3D datasets of color data

------------------------------------------------------
vtkBMPReader reader
    reader SetDataByteOrderToLittleEndian;
    reader SetFileDimensionality 2;
    reader SetNumberOfScalarComponents 1;
    reader SetFilePrefix $filePrefix;
    reader SetFilePattern $filePattern
    reader SetFileNameSliceOffset 1
    reader SetDataExtent 0 $xSize 0 $ySize 0 $zSize
    reader SetDataSpacing $pixelWidth $pixelHeight $pixelDepth
    reader Update

vtkImageExtractComponents extract
    extract SetInput [reader GetOutput]
    extract SetComponents 1

vtkImageToStructuredPoints i2sp
    i2sp SetInput [extract GetOutput]

vtkStructuredPointsWriter writer
    writer SetInput [i2sp GetOutput]
    writer SetFileName $outputFileName
    writer SetFileTypeToBinary
    writer Update
------------------------------------------------------

I thaught maybe the vtkImageExtractComponents would b enough.
But at the end the header of my file contains

------------------------------------------------------
# vtk DataFile Version 3.0
vtk output
BINARY
DATASET STRUCTURED_POINTS
DIMENSIONS 326 211 30
SPACING 1 1 1
ORIGIN 0 0 0
CELL_DATA 1979250
POINT_DATA 2063580
COLOR_SCALARS scalars 1  <------------Pb
------------------------------------------------------

Does someone know how to handle that?
Thank you.

Thomas (TDeschamps at lbl.gov)

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