General ⇒ How to make a PDF

[vietnam]

I want to make a worksheet in the PDF format for my students that they can download, fill up some tables, and be able to download a picture from the PDF, edit it with whatever software they like, then upload it into the PDF so it replaces the current picture, then save their PDF, so they can turn it in.

I managed to make the tables editable by using
CODE: [SELECT ALL] [EXPAND/COLLAPSE] [DOWNLOAD] ({UNTITLED.TEX}) OPEN IN OVERLEAF
\usepackage{hyperref}
then putting a
CODE: [SELECT ALL] [EXPAND/COLLAPSE] [DOWNLOAD] ({UNTITLED.TEX}) OPEN IN OVERLEAF
\TextField
in each cell. But I have no clue how to proceed for the picture.
Is that possible?

Thank you!

[Johannes_B]

No. What you want is not what the pdf format is supposed to be able to do.
Apart from simple forms, a pdf is a very very static and undynamic format.