Still photos remind me of haiku in the sense that they capture a moment, a look, a sound, a scent. I think this is the key to writing good haiku. When I encounter newcomers on some of my haiku lists, they often start off writing little three line speeches instead of taking the more imagist approach that I think is necessary for a good haiku.
For example, if I were to write something about Yvette’s last day home before leaving for college, I could write:
he takes photos of my daughter
before she leaves
This does describe the morning but it isn’t a photograph, a snapshot for my memory photo album, like this would be:
sun in her hair
my daughter’s smile
the day she leaves
This second one somehow recaptures the moment and I can see my daughter in my mind, wearing her white graduation dress, with the morning sun shining on the natural blond highlights in her hair, with a radiant smile on her face. As a poem for others, it may not make as much of a difference, but as a keepsake, as a memory saved, as a "word photograph" it works better for me.
There are many reasons to write a poem. Some we write to share, but some we simply write to treasure for ourselves.