Selecting multiple regions of interest with roipoly

I intend on using roipoly to select regions of interest in a plot. My question is; is it possible to select multiple separate ROI on the same plot? I also intend on applying a mask to the roipoly so that i can apply the same ROI to multiple matrices without plotting them. Because a mask works by setting every point outside the ROI to 0 and inside to 1, does this mean that the actual values inside the ROI are overwritten? Thanks in advance to anyone with clarification on this

[Marco Beccarini]

Did you ever find the code to do this? I have the same exact problem and can't find anything on the internet.

Answer 1

[Image Analyst]

I haven't heard back from you so it seems like you weren't able to do it. I'm attaching a demo for you.

[Marco Beccarini]

Even though I wasn't the one who posted the question, thank you so much!!!!! It's working perfectly!

[Paul Safier]

Excellent demo, thanks!

Answer 2

[Image Analyst]

You have to create multiple mask and OR them together.

Answer 3

[Ruggero G. Bettinardi]

Great, thanks a lot!

Answer 4

[Amir Azadeh Ranjbar]

thanks you Image Analyst