Draw principal axes

Support
1

Hello,
I would like to draw Principal axes (segment statistic) using Python console. Is it possible please?

thank you!

2

You can create line or curve markups for the axes and have a control point at (0,0,0) and the other in the coordinate of the axis you got from Segment Statistics.

3

There is an example in the script repository that draws the principal axes using ROI markup. It should not be hard to modify it to use lines instead.

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1 Like
4

Hi,
Thanks for the suggestion given above. I found the Python code and I believe I should change some string names. However, I am not sure with what name I can call the principal axes.
For example: what should I put instead of obb_direction_ras_x within "LabelmapSegmentStatisticsPlugin.obb_direction_ras_x" to obtain the principal x axes?

In the end I would like to obtain a figure as in this post, in the Principal axes and moments figure.

Thanks in advance!

5

The referenced script to generate the bounding boxes still works well. There is no need to change anything. The principal x axis is saved into the obb_direction_ras_x variable.