[Insight-users] Re: Volume Data Headsq in ITK VTK Example

[Karthik Krishnan]

Hi Sharef:

Try using

vtkImageReader *reader = vtkImageReader::New();

reader->SetDataMask(0x7fff);

Thanks
Regards
karthik


alqatarneh at netscape.net wrote:

>Hello Luis and all again,
>
>Thank you Luis for your fast reply.
>I agree that Google is a good search engine but it did not help me much in this case.
>I found the link that you directed me to and many other links but that was not the dataset that I was referring to.
>
>Maybe I did not make myself clear..
>There are 2 different Headsq datasets in ITK (Quarter, Half).
>There is also one more dataset of HEADSQ Images (headsq.1, headsq.2,.... headsq.94) that is used to demonstarte the example:(InsightApplications/vtkITK/Scripts/DemoMutual.tcl).
>
>That dataset I downloaded from:
>ftp://public.kitware.com/pub/vtk/VTKTextbook/FullHead.tgz
>
>To my understanding it has different format from the Headsq Quarter and Half format. 
>The ReadMe of this HEADSQ dataset says: "Warning: this dataset has a connectivity bit set (unlike the half and quarter resolution cases). Set the data mask in vtkVolume16Source to mask out the high-order bit."
>
>Am I wrong? is the format of this dataset similar to the Quarter and Half datasets?
>If it is different from the others , can you tell me how I can convert my images to the same format as the HEADSQ Image format, and add the connectivity bit set " As mentioned above: this dataset has a connectivity bit set "?
>
>
>Kind regards,
>Sharef
>Luis Ibanez <luis.ibanez at kitware.com> wrote:
>
>  
>
>>Hi Sharef,
>>
>>
>>         Google is an amazing tool.
>>
>>If you type:
>>
>>
>>              "headsq itk"
>>
>>
>>The third link is the following email of the ITK users list
>>http://public.kitware.com/pipermail/insight-users/2003-May/003894.html
>>
>>Where you will find the MetaImage header that allows you to read
>>the headsq dataset with an itk::ImageFileReader.
>>
>>filename="quarter.mhd":
>>
>>
>>NDims = 3
>>DimSize = 64 64 93
>>ElementSpacing = 1 1 1
>>Position = 0 0 0
>>ElementByteOrderMSB = False
>>ElementType = MET_USHORT
>>ElementDataFile = quarter.%d 1 93 1
>>
>>
>>
>>
>>Note that the actual demo that you are looking at is an early
>>experiment where ITK filters where wrapped inside VTK filters.
>>In that situation, the reading of the image is done with VTK
>>filters.
>>
>>
>>I would suggest you to use the MetaImage header attached and
>>look at the ITK registration applications such as
>>
>>
>>    InsightApplications/
>>         LandmarkInitializedMutualInformationRegistration
>>
>>
>>Once you load an image in ITK you can save it in any
>>of the formats listed on the FAQ
>>
>>http://www.itk.org/Wiki/ITK_FAQ#What_3D_file_formats_can_ITK_import_and_export.3F
>>
>>
>>
>>
>>  Regards,
>>
>>
>>     Luis
>>
>>
>>
>>----------------------------------
>>alqatarneh at netscape.net wrote:
>>
>>    
>>
>>>Hi Luis, Hi all,
>>>
>>>There is a dataset of HEADSQ Images (headsq.1, headsq.2,.... headsq.94)
>>>
>>>that is used to demonstarte the example (InsightApplications/vtkITK/Scripts/DemoMutual.tcl).
>>>
>>>I understand that the format of such data is different from the Quarter and Half Headsq data as pointed out in the ReadMe:
>>>"Warning: this dataset has a connectivity bit set (unlike the half and
>>>quarter resolution cases). Set the data mask in vtkVolume16Source to
>>>mask out the high-order bit."
>>>
>>>Can someone tell me how to produce similar format to the HEADSQ.n format from my own images?
>>>
>>>I searched quite alot but I found most info available is mostly about the Headsq Quarter dataset.
>>>
>>>Thank you very much in advance!
>>>
>>>Regards,
>>>Sharef
>>>
>>>
>>>      
>>>
>>
>>
>>    
>>
>
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