[Insight-users] FDF Reader

[Luis Ibanez]

Hi Glen,

First,
The obvious question:  Have you succeded
visualizing this FDF file with any other tool ?
In other words: Do you trust this file ?
Are you sure that the pixel is encoded in floats
in this file ?  a simple verification is that
the file size should have a size of

        256 x 256 x 4 = 250880 bytes



Second:
You may want to simplify your MetaHeader
to be just


    NDims = 2
    DimSize = 256 256
    ElementType = MET_FLOAT
    ElementSpacing = 1.0 1.0
    ElementByteOrderMSB = False
    ElementDataFile = brain.raw


That's the minimum number of entries needed
in the header.



Third:
Please post the section of code where you are
instantiating the MetaImage reader and printing
out its content.  The order of operations may
be important.




Thanks



    Luis


--------------------
Glenn Pierce wrote:

> Hi
> 
> I am currently developing a FDFImageIO class to read Varian FDF files
> which are just raw data with a small header describing the dimensions
> and other attributes.
> 
> I have got to the point where I can display a window of garbage.
> To check my code I also attempted to read my example FDF file as a
> MetaImage by creating the header such as
> 
> NDims = 2
> DimSize = 256 256
> BinaryData = False
> ElementType = MET_FLOAT
> BinaryDataByteOrderMSB = True
> ElementByteOrderMSB = False
> ElementMin = 0.0
> ElementMax = 65000.0
> HeaderSize = -1
> ElementSize = 1 1
> ElementSpacing = 1.0 1.0
> ElementDataFile = brain.raw
> 
> However, I get the same results as my FDF class.
> 
> Although I specify ElementByteOrderMSB = True and
> BinaryDataByteOrderMSB = True 
> 
> after sending the instantiated reader to cout <<
> I see
> 
> BinaryData = True
> BinaryDataByteOrderMSB = False
> 
> Why does BinaryDataByteOrderMSB not get set to true ?
> 
> Also I get the warning Min and Max are not valid ?
> 
> Are there any other likely reasons for the image not displaying
> correctly ?
> 
> I will post the code when I somewhere to upload to.
> 
> Thanks
> 
> 
> ___________________________________________
> 
> Glenn Pierce
> 
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