Server and operating method thereof

A server comprising:

• a session management device configured to establish a video call session between a first electronic apparatus of a first user and a second electronic apparatus of a second user;
• a communication device configured to receive match satisfaction calculated from the first electronic apparatus through the video call session;
• an image analysis device configured to obtain first feature point distribution information from a face image of the first user and configured to obtain second feature point distribution information from a face image of the second user;
• a processor configured to train a machine learning model by using the first feature point distribution information, the second feature point distribution information, and the match satisfaction and configured to estimate the match satisfaction of the first user for each of standby users by using the trained machine learning model when a video call connection between the first electronic apparatus and the second electronic apparatus is terminated;
• and
• a user management device configured to select a third user, who becomes a next video call counterpart of the first user, from among the standby users by using the estimated match satisfaction.

An operating method of a server, the method comprising:

• receiving a request for a video call connection from a first electronic apparatus of a first user;
• establishing a video call session between the first electronic apparatus and a second electronic apparatus of a second user;
• obtaining first face information of the first user and obtaining second face information of the second user;
• receiving at least one or more satisfaction factors of the first user for the second user;
• training at least one or more machine learning models by using the first face information, the second face information, and the at least one or more satisfaction factors;
• estimating the at least one or more satisfaction factors of the first user for each of standby users by using the first face information, face information of each of the standby users, and the trained machine learning model, when the video call connection between the first electronic apparatus and the second electronic apparatus is terminated;
• calculating match satisfaction of the first user for each of the standby users by using the estimated at least one or more satisfaction factors;
• and
• selecting a third user, who becomes a next video call counterpart of the first user, from among the standby users by using the calculated match satisfaction.