Please help with flipping a polygon ROI (horizontal and/or vertical axis)

[Andres_Illanes (Andrés Illanes)]

Hi everyone,

I need to flip a polygon roi in the horizontal axis but I do not know how to do that.

[Ajay_Zalavadia]

Did you try the suggestion posted here:

Flip image or annotation

There is probably a better way to do this now, but this should at least work. Note the commented out line for vertical flips. import qupath.lib.objects.PathAnnotationObject import java.awt.geom.AffineTransform // Get selected object & its ROI def selected = QPEx.getSelectedObject() def roi = selected?.getROI() if (roi == null) { print 'No ROI selected!' return } // Create the relevant transforms, incorporating the image dimensions def server = getCurrentImageData().getServer() def f…

[Andres_Illanes (Andrés Illanes)]

Thank you so much, it works perfectly.

I tried some scripts from some years ago but they didn’t work.

Thank you so much again.