Those images are flowers on the ceremonial dress….
Past presidents' trips to Asia
US President George W. Bush, right, chats with Chinese President Hu Jintao, left, and Russian President Vladimir Putin, center, at the end of the Asian-Pacific leaders meeting in Hanoi on Nov. 19, 2006. All 21 Asia-Pacific leaders wore dresses. But only the three women, pretty in pink, had the sartorial nerve to don the hats. Each year, the summit of the Asia-Pacific Economic Cooperation forum provides world leaders with an opportunity to strut their stuff in the traditional garb of the host country for the so-called "family photo"
https:// www.azcentral.com/story/news/politics/2017/11/06/trump-lands-south-korea-nuclear-talks-north-korea/838063001/