Darth Mallwalker said:

There's some ambiguity in the phrase "when Imgburn makes the image". It depends on which method used.
One method is to copy the image from an optical disc into a file on the hard disk. That's the (off)topic of this thread.
Another method would be to generate a new image from a folder that happens to be on an optical disc, in the same fashion as one might generate an image of a folder on a hard disk. That's not what we want this time.
Can you see the distinction?

I'm confident Imgburn can do either method, but being a Linux guy I don't know Imgburn's name for either one.

Yes, I see the distinction.

From ImgBurn's Ez-Mode Picker, you can either
Create image file from disc
or
Create image file from files/folders.