If you click on the image for the full version you can see the photo in all its Cooper-esque glory. It’s dated 1976, which is apparently shortly before Cooper was hospitalised to treat his alcohol problems.
Even with an enlarged image the writing remains quite hard to read but according to this autograph auction page the text reads:
A b&w 8″ x 10″ photo inscribed “Eugene from Both of Me to all 15 of You” and signed “Alice Vincent Cooper” in black ink by the original shock rocker. the date “8-76” is printed above the inscription. “Eugene” refers to psychologist Eugene Landy, with whom Cooper was a patient in the 1970s. (Lundy also treated Brian Wilson of the Beach Boys.)
To say Lundy ‘treated’ Brian Wilson is a bit like saying Napolean ‘toured’ Europe as he eventually lost his license after it was found out that he had taken over Wilson’s business affairs while supposedly working with him as a responsible clinician.
The situation lasted several years and has become a notorious episode in Wilson’s life.
Link to photo on Flickr.