[Insight-users] Manual drawing on fltkimage viewer display

[Karthik Krishnan]

Suja S wrote:

> Thanks so much for the detailed answers ,Luis.
> I am developing a tool for brain tumor segmentation using ITK & FLTK.
> Presently it does region growing segmentation, but sometimes it is 
> preferred to have a ROI drawn by the end user to include or exclude a 
> particular region and also to edit the final segmented output. Right 
> now we use a different tool to do the drawing and editing, but it will 
> be a lot easier if it can be done in the fltk image viewer where the 
> seed points are clicked. That will make it a complete tool for the end 
> user.
> I would love to add these capabilities to the image viewer if someone 
> can direct me. Do I change the code in InsightApplications/Auxillary 
> for that?

Some of that capability is already there. GLSliceView stores the list of 
clicked points and their associated intensity values in an std::list.
In fact, If you fire up the ImageViewer, "T" overlays the clicked points 
on the image as you click. "p" saves these clicked points in a file.

Also look at 
LandmarkInitializedMutualInformationRegistration/LandmarkSliceViewer.txx  
The application initializes its ROI from 4 or more clicked points. Its 
rather naive in that it creates a recutangular ROI that is bounded by 
these points. But at least its a starting point ...

I would suggest subclass-ing  GLSliceView to be able to draw closed 
contours. (and contributing the code back, of course :) )

-karthik

> Thanks again,
> Suja.
>
> */Luis Ibanez <luis.ibanez at kitware.com>/* wrote:
>
>
>     Hi Suja,
>
>     The FLTK image viewer is provi! ded as a minimal viewer, but with the
>     decent capabilities of taking into account the pixel size of a medical
>     image and respecting the natural orientation of the image.
>
>
>     There are basic capabilities in the fltk viewer for selecting clicked
>     points, but not for marking regions of interest, or for performing
>     pixel editing.
>
>
>
>     For an application that provides those features, you may want to give
>     it a try to SNAP. This application is also distributed with ITK, in
>     the InsightApplications module. It requres VTK, ITK and FLTK.
>
>
>     SNAP is ultimately intended for performing LevelSet segmentations of
>     your images, but as a way of initializing those level sets, SNAP let
>     you define manual segmentations on a slice-by-slice basis. Of course,
>     you can simply use SNAP as a manual segmentation tool.
>
>     You can get binary versions of SNAP from its web site:
>
>     http://www.itksnap.org/
>
>     as well as Tutorial:
>
>     ! http://www.itksnap.org/docs/Tutorial.html
>
>
>
>
>
>     Another tool that you may want to try is Slicer:
>
>     www.slicer.org
>
>     a tutorial for Slicer is available at:
>
>     http://www.slicer.org/tutorial/
>
>     The source code is open, and binary version are also available
>     for download.
>
>
>
>
>     The capabilities that you describe are commonly requested by end
>     users, and it may be a good idea to put them together in a minimal
>     tool that can be shared with the community.
>
>
>
>     Please let us know if you have other questions.
>
>
>     Thanks
>
>
>     Luis
>
>
>     -------------
>     Suja S wrote:
>     > Hi,
>     > I am using fltk image viewer in my ITK application.
>     > Image viewer shows the 3D image with options of window leveling,
>     zooming
>     > etc.
>     > I would like to know whether it has the capability of user
>     drawing a ROI
>     > over the image and saving it. Also ! is it possible to do the
>     manual
>     > editing on the final segmented image to add/remove pixels? Any
>     answer on
>     > this will be appreciated greatly.
>     > Thanks a lot,
>     > suja.
>     > >
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