[vtkusers] re ad a raw file (32-bit signed integers) with vtkImageReader

[Orlinn]

hello Jeremy,

i will try to use your version with the class vtkImageCast maybe it works. 
I used SetDataMask of vtkImageReader but it did not work but maybe with
vtkImageCast

thank you

Jérôme-2 wrote:
> 
> Hi again,
> 
> I never used that but it may be what you want: there is a SetDataMask
> function in vtkImageReader. Try to set it as you want. Then, connect your
> reader to a vtkImageCast filter. This should do the trick.
> 
> HTH,
> Jerome
> 
> 2009/10/19 Orlinn <MeinDatenLaufwerk at googlemail.com>
> 
>>
>> hello jerome,
>>
>> i use the data from vtkImageReader show the the MIP (maximum intensity
>> projection) but i see not the right result. With other raw files it
>> works.
>> i
>> have to use  SetDataScalarTypeToUnsignedShort() or
>> SetDataScalarTypeToUnsignedChar() because vtkVolumeRayCastMapper can only
>> render data of type unsigned Short or unsigned char.
>>
>> i use 32-bit signed integer so i have 4 bytes and i need the last 2
>> bytes.
>> but i have no ideas how can cast these data into unsigned Short or
>> unsigned
>> Char.
>>
>> thank you
>>
>>
>>
>> Jérôme-2 wrote:
>> >
>> > Hi,
>> >
>> > First of all, I thought that unsigned short are 2 bytes integers.
>> Correct
>> > me
>> > if I mistake!
>> > Then, could you give more precision on what doesn't work? Do you get a
>> VTK
>> > error message, an empty volume, a segfault, or something else?
>> >
>> > Best regards,
>> > Jerome
>> >
>> > 2009/10/19 Orlinn <MeinDatenLaufwerk at googlemail.com>
>> >
>> >>
>> >> hello VTK world,
>> >>
>> >> i have a raw(32-bit signed integers) file which contains my images.
>> >> From the 4 bytes i need only the 2 last bytes, i thought i can set a
>> mask
>> >> like 0x00FF.
>> >> but it does not work. I use the the class vtkImageReader.
>> >> When i try with 16 and 8 bit raw files, it works.
>> >>
>> >> this is my code
>> >>                vtkImageReader rawreader= new vtkImageReader();
>> >>                rawRedaer.SetFileName("C:/Desktop/rawFile.dat");
>> >>                rawReader.SetDataExtent(0, 511, 0, 511, 0, 249);
>> >>                rawReader.SetDataScalarTypeToUnsignedShort();
>> >>                rawReader.SetDataByteOrderToBigEndian();
>> >>                rawReader.SetFileDimensionality(3);
>> >>                rawReader.SetDataSpacing(0.40234375, 0.40234375, 0.5);
>> >>                rawReader.SetNumberOfScalarComponents(1);
>> >>                rawReader.Update();
>> >>
>> >> can somebody tell me what i have to add????
>> >>
>> >> sorry for my english and my VTK knowledge
>> >>
>> >> thank you
>> >> --
>> >> View this message in context:
>> >>
>> http://www.nabble.com/read-a-raw-file-%2832-bit-signed-integers%29-with-vtkImageReader-tp25956561p25956561.html
>> >> Sent from the VTK - Users mailing list archive at Nabble.com.
>> >>
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>> View this message in context:
>> http://www.nabble.com/read-a-raw-file-%2832-bit-signed-integers%29-with-vtkImageReader-tp25956561p25956898.html
>> Sent from the VTK - Users mailing list archive at Nabble.com.
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
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> 
> _______________________________________________
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> 
> Visit other Kitware open-source projects at
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> 
> Please keep messages on-topic and check the VTK FAQ at:
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> 
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