Hello, 

I have been working on the ImageView class since I wanted to be able to add 
multiple PolyLineROIs to the view and display the roiCurves alltogether in 
the view below. These two features work well. 

However, when I change the handles of an individual roi, or add an handle, 
the roiCurve does diplay false values. Something must be in the getArrayRegion 
function or around. I am not quite sure where to start looking and would 
appreciate any hint. 

The behavior can be tested by running  roiAnalysis.py here : 
https://github.com/mgraupe/pyqtgraph

Thanks a lot in advance.

Cheers,
Michael 

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