Is there a way to convert all embedded pictures to be references?

[Avraham Makeler]

Hi all,
I have some chapters that have a lot of embedded pictures.
I still have the picture sources (e.g., PNG, JPG) in a particular
directory.

Is there a way, in one fell swoop, to convert all the pictures from being
embedded to being references?

Doesn't seem there is a way, since I notice that an embedded picture loses
its original filename (and path).

tnx

avi