[Insight-users] crashes N-D Linear Time Exact Signed Euclidean Distance Transform

[Oleksandr Dzyubak]

Hi Bill,

Now I am a bit confused by what you are saying.

1) You say that it works for 3D but does not for 2D.
I cannot understand that since 2D dimensionality is a particular case of 3D.
Lets say 2D is a 3D with just one z-component. From my prospective, it 
has to work
for 2D if it does for 3D. Opposite is not necessary true though.

2) If I comment the writer out, the program still crashes with the same 
error.

3) All my images are in the Analyze75 format
and while using the other ITK filters I have not had any problems so far.
(I mean with ITK Analyze reader/writer, except orientations, of course).

Do you mean that even though my executables did not complain,
the results I was getting could be wrong since I used ITK Analyze 
reader/writer?

If so, in what fashion could the final results be wrong?

Is it error-prone for some particular platform/compiler
(Linux Debian with gcc 4.1.2 in my case) or it is more general case?

How severe does it affect the final results?

Thanks for your help,

Alex


Bill Lorensen wrote:
> Oleksandr,
>
> There are some known problems in the ITK Analyze reader/writer when
> the images are 2D and not 3D. I think the read part has been fixed
> recently. However, the write part still has problems. If your images
> are 3D, then all should be fine. Until we fix this 2D Analyze image
> problem, I'm afraid you cannot run the filters.
>
> Bill
>
> On Sun, Jun 1, 2008 at 1:07 PM, Oleksandr Dzyubak <adzyubak at gmail.com> wrote:
>   
>> Hi Bill,
>>
>> This time I try to be more accurate.
>>
>> 1) I downloaded ITK from CVS, compiled with the RelWithDeb flag, and
>> installed on my Linux box.
>> 2) I have Debian Etch with gcc 4.1.2
>> 3) The example itkSignedMaurerDistanceMapImageFilterTest.cxx was taken
>> from ITK distro and not from IJ.
>>
>> Insight/Testing/Code/BasicFilters/itkSignedMaurerDistanceMapImageFilterTest.cxx
>>
>> 4) Example was compiled in debug mode.
>> 5) As you advised, the example was run on both SquareBinary201.png and
>> SquareBinary201.hdr.
>>
>> Results.
>> As you predicted, the example has processed the *.png image taken from ITK
>> distro resulting
>> in a nice looking map.
>>
>> dzyubak at debian: /BUILD$ ./SignedMaurerDistanceMapImageFilterTest
>> SquareBinary201.png test_png.hdr
>> WARNING: In /root/Insight/Code/IO/itkAnalyzeImageIO.cxx, line 1280
>> AnalyzeImageIO (0x8169a98): ERROR: Analyze 7.5 File Format Only Allows RPI,
>> PIR, and RIP Orientation
>>
>> However when I tried to run it on a real stuff (all my images in Analyze75
>> format), the same image but
>> taken from IJ archive (SquareBinary201.hdr), it crashes.