[vtkusers] 8 bit data volume rendering (yet again)

[Jérôme]

Since your files are 1024x512 and you have about 800, you should set an
extent of (0,1023,0,511,0,799). But maybe I am wrong, because I am not used
to stack images loading. You possibly have to set the extent of one file
(i.e. SetDataExtent(0,1023,0,511,0,0)), the multiple files loader may be
able to set the z-extent to the number of concerned files.

SetDataExtent( int xMin, int xMax, int yMin, int yMax, int zMin, int zMax );

Cheers,

Jerome

2009/4/23 Divya Rathore <divyarathore at gmail.com>

> Thanks Jerome!
>
> Is:
>
> virtual void SetDataExtent<http://www.vtk.org/doc/release/4.2/html/classvtkImageReader2.html#z2403_0>(int, int, int, int, int, int)
>
> the one to be used to set dimentions? What is the exact usage? which int is
> what? :)
> All that the docs mention is "Get/Set the extent of the data on disk."
>
>
>
>
> On Thu, Apr 23, 2009 at 11:33 AM, Jérôme <jerome.velut at gmail.com> wrote:
>
>> Hi,
>>
>> Sorry for my last answer, my understanding of your problem was wrong. If I
>> am right, you should use the vtkImageReader (or vtkImageReader2) that allow
>> you to load a stack of raw images as a volume. The member functions
>> SetDataScalarTypeToChar( ) and SetFileDimensionality( 2 ) should do the
>> trick for your 8bit stack. Set other information (file prefix, size, etc.)
>> and you will have as output an 8bit volume with dimension on z equal to the
>> number of files and x,y dimensions to the image size you set.
>>
>> Yes, keep hope! What you wish is possible with VTK!
>>
>> Best regards,
>> Jerome
>>
>> 2009/4/23 Divya Rathore <divyarathore at gmail.com>
>>
>>> Hi All,
>>>
>>> Kind of my last attempt looking for a solution for this..
>>>
>>> How do I do volume rendering (one may call it skin extraction as in
>>> Medical1 sample) for 8 Bit dataset in VTK?
>>> Image format could be multiple Tiff files or multiple raw 8-bit files.
>>>
>>> Medical1 sample takes 16bit images. But I have around 800 files with
>>> 1024*512 resolution so 16 bit data for that is a bit too much for Medical1
>>> sample to handle. Hence the need to render 8 Bit data set.
>>>
>>> I guess this would be my last attempt to seek suggestions regarding VTK
>>> before I try other options. But am still hopeful..
>>>
>>> regards,
>>> D Rathore
>>>
>>>
>>> On Sun, Apr 19, 2009 at 7:24 PM, Divya Rathore <divyarathore at gmail.com>wrote:
>>>
>>>> Hi All,
>>>>
>>>> I was using Medical sample with Visual C++.
>>>> It takes 16 bit files in the format xxx.1, xxx.2, xxx.3 etc. All works
>>>> to taste.
>>>>
>>>> The Problem - How can I supply it 8 bit files? I have around 800 files
>>>> and converting them to 16 bit will double the data size - too huge for my
>>>> graphics card.
>>>>
>>>> regards,
>>>>
>>>>
>>>
>>>
>>> --
>>> "The difference between school and life? In school, you're taught a
>>> lesson and then given a test. In life, you're given a test that teaches you
>>> a lesson."
>>>
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>>
>
>
> --
> "The difference between school and life? In school, you're taught a lesson
> and then given a test. In life, you're given a test that teaches you a
> lesson."
>
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