Since most of you wont have a PlayStation Eye the easiest method will be an in-game photo.
You can take a photo at any time by pressing
and selecting the bottom option of the camera.
Now open the Pod Controller and open 'Me - My Moon' then hover over any level you have created, press
and at the top hover over the blank level badge.
to edit the badge and select one of your custom photos you will then need to publish the level to unlock the trophy