A portrait can speak volumes about its subject. It can massively support or can utterly undermine a person’s business image. Sunburnt holiday snapshot? A scan of a long-since faded school photo? Or even a picture of one of the kids covered in chocolate? We've all seen them as profile pictures on social media.
It creates a first and lasting impression and I don't think I am going out on a limb by saying that in the corporate world, your chosen image will speak about you as a professional.
A single portrait, or a set of images of the board is one of the ways in which you can communicate and manage a whole host of perceptions to do with culture, mood, brand, context, the list goes on.
And don't be afraid to go beyond conventional. You could argue that there are already too many board tables in board photos. It is rarely the table that defines the company.