[Insight-users] a question about ShapeDetection.

[Lydia Ng]

Hi,

The ShapeDetection app was originally intended to serve as
an example to how to use the fast marching algorithm in ITK -
as such the user interface is very rudimentary.

Although the underlying code works for 2 or 3D,
the ShapeDetection app has been hard-wired to require the input
to be a single raw volume and in signed short (16 bits).
The other constraint is that it can only handle 3D data
(with at least 4 slices).

>         c. Input image big endian? [y|n]: Y (What's the meaning of
"image endian"?
> something like edge?)

Endian-ness refers to how multi-byte numbers are stored.
There should be numerous article on the web. e.g.
http://www.cs.umass.edu/~verts/cs32/endian.html

- Lydia

> -----Original Message-----
> From: =D5=D4=B3=BF=B9=E2 [mailto:zhaocg@eyou.com]
> Sent: Sunday, March 03, 2002 11:36 PM
> To: insight-users@public.kitware.com
> Subject: [Insight-users] a question about ShapeDetection.
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> Hi everyone,
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> I am a new user to ITL. I got two questions to ask.
> (1) I have downloaded the ITL source code, configed it with CMake, and
> compiled it with MSVC++6.0 sucessfully. But I can not run=20
> ShapeDetection
> example correctlly. Here is my operation steps:
> 	a. run ShapeDetection.exe (It's a DOS executable program) =20
>          b. Input file name: bt.001.pgm
> 	c. Input big image endian? [y|n]: Y (What's the meaning=20
> of "image endian"?
> something like edge?)
> 	d. Input image size: 512 512 1 (I want to input a 2-d image)
>          e. PGM output directory: c:\
> 	f. Writing PGM files of the output volume=20
> but I can find nothing under the directory of C:\. What's the=20
> problem? Thanks
> for your feedback.
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> (2) I want to understand related sourcecode of ITK, including=20
> some basic
> functions or classes, such as image reading and writing=20
> functions. I think ITK
> has a wonderful programming style. To learn from it will=20
> greatly facilitate my
> research and communication with other domain experts. Where=20
> shall I start
> from? Waiting for your help. thanks.
>     My research interest is in Content-based image retrieval=20
> in medicine.
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