initialize vtkBorderWidget with the click of the mouse

Support
1

Dear all,
I want to obtain a ROI over an vtkimagedata (dicom) to perform certain statistics in that area (e.g., mean, std…). So i am using vtkBorderWidget. But i found out that it is always initialzed at the left bottom side of the image. And i do not understand why, it would be more logical to start the rectangle around the left click of the mouse.

So i tried to change the position in the widget representation to position it initially around the mouse position. But if i do that the mouse interaction is disabled. So i am not able to translate it anymore.

Has someone the same problem?. Is there any other widget that solves this issue?

Thanks

2

I have tried to use a bounding box instead as i read it is a bug from vtkborderwidget and it works but as it is a 3d representation i get a divided rectangle to show a 3d bounding box so the visualization is very ugly. What i want to obtain is something similar to the image. Is there any widget in vtk to do that, or i have to implement it by myself redoing the vtkBorderWidget considering the mouse position in the initialization and removing the behavour to ignore the observers if a coordinate is defined? Thanks

screenshott area

3

Would you like to implement manual image segmentation?

4

Hi, thank you for answering.i am not implementing the segmentation of the image. It is only to show some statistics of the region selected in a text widget.

Thanks

5

hello, what i would like to acheive is this but a rectangle instead of a bounding box. Any sugestion?. Thanks

Screenshot_4

6

I will make it with vtklinewidgets if someone is interested please let me know. It might be incorporated in vtk. As i think it can be very useful.

Thanks