He participated in a parade in Washington in relation to Roosevelt's second inauguration. This landed him an audience with the President, in which he asked for the pardon of himself and his fellow prisoners of war. Roosevelt rejected him personally.
He was happy to parade him in front of the nation as a symbol of national unity though.
I suspect it could be from an old postcard, which might indeed have had some artistic retouching done to improve upon the original photograph. If so, the version hosted on Wikimedia might be more true to the original. :)