[Insight-users] contributions to insight applications

[Lino Ramirez]

Hi Luis,

Here is a small modification for
InsightApplications-1.8.0/ThresholdSegmentationLevelSetFltkGui that I
found useful. I added a small eraser check button to
SegmenterConsoleGUI.fl
and made these changes in the file
SegmenterConsole.cxx
in void SegmenterConsole::GetClickPoints(float x, float y)
add the line

  WriteImageType::PixelType initialValue2 = 255;

at the top of the method

and change the line
m_guessImage->SetPixel(pixelIndex2, 0);

with


if (eraseGuess->value() < 1)
{
  m_guessImage->SetPixel(pixelIndex2, 0);
}
else
{
  m_guessImage->SetPixel(pixelIndex2, initialValue2);
}

These small changes are useful when you are new to ITK and you just want
to test the applications.

You can download the modified source code from

http://www.ece.ualberta.ca/~ramirez/itk/NewThresholdSegmentationLevelSetFltkGui
note that the modified CMakeLists.txt file is available at
http://www.ece.ualberta.ca/~ramirez/itk/


I also did a small modification that consisted in adding a method to
deleteLastClickedPointsStored in
C:\InsightApplications-1.8.0\Auxiliary\FltkImageViewer\SliceView.h
as the name indicates, this method adds the capability of deleting only
the latest clicked point from the buffer. The actual implementation only
lets you clear the buffer.

I wrote a small application to test the method. The source code is
available at
http://www.ece.ualberta.ca/~ramirez/itk/SquareCornersPointSelection/

In this application, you select the 4 corners of a vertebra (or a square
region) and click show body and you get the selection highlighted and the
area in pixels computed.

Notes:
1.- This application is based on the GUI of
ThresholdSegmentationLevelSetFltkGui.
2.- In the image viewer GUI I added a reset button. It does the same that
the ‘r’ key
3.- This application is part of a larger application that I am developing
for my research: the segmentation of vertebrae from x-ray images of
patients with scoliosis
4.- one image you could use for testing the code is available at
http://www.ece.ualberta.ca/~ramirez/itk/
This image is an x-ray of my lumbar spine so no worries about freely
distributing it

I think these small contributions could be useful for other itk users.

Please, let me know if you need more information or if you have any
problem with the files

Have a nice day

Lino