'Suites of poetry that featured pictures, photographs, artworks, graphics and/or drawings were frequent. While better works had integrity and coherence without the visual element, many other suites and the individual poems in them were heavily reliant on the visual to make meaning. This was also the case with quotations used as epigrams, structural or framing devices. While they may be integral to the work, the work should offer some new or developed insight or perspective that is linked to the quotation.'
Yes, this is for poetry but the same principle applies. Consider this when thinking of including a picture.