[Insight-developers] Image-based Testing in Tcl

[Miller, James V (Research)]

Can we provide this framework to the Cxx tests (so Tcl binding are not required)?

> -----Original Message-----
> From: Brad King [mailto:brad.king@kitware.com]
> Sent: Wednesday, September 04, 2002 11:13 AM
> To: Insight Developers
> Subject: [Insight-developers] Image-based Testing in Tcl
> 
> 
> Hello, all:
> 
> Recently I've been working on image-based testing for ITK.  
> I've written a
> Tcl test that uses a new DifferenceImageFilter to test the
> CurvatureFlowImageFilter.  I generated a valid image and then 
> changed the
> number of iterations in the test to purposely fail.  The 
> results of this
> are available in an experimental dashboard submission:
> 
> http://www.itk.org/Testing/Sites/hythloth.kitwarein.com/Linux-
2.4.18-c++/20020904-1439-Experimental/Results/__Testing_Code_Algorithms_itkCurvatureFlowTestTcl.html

There are some difference image statistics available at the bottom of the
test output:

  MeanDifference = The average pixel difference (absolute value).
  TotalDifference = The sum of all pixel differences.

The difference image has been scaled to the full 0-255 range to make it
easy to see, but the shift/scale parameters used for this adjustment are
displayed as

  DifferenceShift = The shift used to adjust the difference image.
  DifferenceScale = The scale used to adjust the difference image.

The test is in

Insight/Testing/Code/Algorithms/itkCurvatureFlowTestTcl.tcl

and the valid image is in

Insight/Testing/Data/Baseline/Algorithms/itkCurvatureFlowTestTcl.png

Please let me know if you have any suggestions.  Once the testing is
slightly more automated (to reduce per-test code duplication) I'll send
out instructions for writing an image-based test in Tcl.  We can also talk
about this on the next TCON.

-Brad

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