I Agree with Paul U, especially for duplicated Pictures, it would be good to select the file and Duplicate finder show a preview of the photo/picture, similar to windows functionality, there is enough room in the UI to show this on the right side of the results.
The Preview should be shown when clicking on the name, then user can select if to be deleted later in the process.
This would be fantastic functionality and extremally helpful.
Thanks for your consideration.
Kind Regards
Steve