How to Obtain Filename of Image Taken by Camera for use in Deluge Script

How to Obtain Filename of Image Taken by Camera for use in Deluge Script

I have a Form that stores a photo taken by an Android phone's camera in an Image field ("Photo_Field"). The URL of a sample photo in a Report ("Donations_Report") is shown below:
How do I obtain the filename of the image (jpg) file to include it in a Deluge script? (The script will display the Image in a Note field when I open the Form for editing.)