Video synthesis device, video synthesis method and recording medium

A video synthesis method for generating an augmented reality video image in which an avatar is synthesized with a live-action video image, the method, executed by a mobile terminal held by an operator, comprising:

• detecting a position and an orientation of a first imaging unit configured to capture the live-action video image, in a coordinate system corresponding to a real space;
• controlling the avatar based on an image captured by a second imaging unit configured to capture the image of the operator;
• arranging the avatar in any initial position of the coordinate system in which the avatar is arrangeable, based on an operation by the operator;
• and
• synthesizing the avatar with the live-action video image captured by the first imaging unit,
• wherein the live-action video image in which the avatar is synthesized is configured for distribution to a viewer via a server.

A computer-readable recording medium, storing a video synthesis program for generating an augmented reality video image in which an avatar is synthesized with a live-action video image that causes a processor to execute:

• detecting a position and an orientation of a first imaging unit configured to capture the live-action video image in a coordinate system corresponding to a real space;
• controlling the avatar based on an image captured by a second imaging unit configured to capture an image of an operator;
• arranging the avatar in any initial position of the coordinate system in which the avatar is arrangeable, based on an operation by the operator;
• and
• synthesizing the avatar with the live-action video image captured by the first imaging unit,
• wherein the processes are executed by a mobile terminal held by the operator, and the live-action video image in which the avatar is synthesized is configured for distribution to a viewer via a server.