The image shows a glass door with three signs on it. The signs are white with black text and have the words "ALGO 2017" and "REGISTRATION info desk" written on them. The sign on the right side of the door has an arrow pointing to the right, indicating that the registration information desk is for the Algo 2017 event. In the background, there are people walking through the room and a table with various items on it, suggesting that the event is taking place in an indoor space.