Method of replaying game video using camera information calibration
Provided is a method of replaying a game video using camera information calibration, and more particularly, to a method of replaying a game video using camera information calibration, in which a game video is replayed by calibrating information related to operation of a camera in a virtual space so as to provide users with game videos that are convenient to view. According to the method of replaying a game video using camera information calibration, movement of a camera that captures a video of a virtual space may be effectively controlled when replaying a game play situation so that inconvenience caused to a viewer who views the replay video is minimized and the viewer may conveniently view the game replay video for a long period of time.
1. A method of replaying a game video using camera information calibration, the method comprising:
(a) storing, by a processor, a maximum variation over time of at least one of a location, an angle, and an angle of view of a camera, as a camera operation limit, wherein the camera captures a video of a game play situation in a virtual space;
(b) defining, by the processor, a thing, a character, and a background appearing in a three-dimensionally defined virtual space of a game as objects and storing movements of the objects in the virtual space over time during a game play, as object replay information;
(c) storing, by the processor, locations, angles, and angles of view of the camera over time, as cameras information, wherein the camera captures a video of a game play situation in the virtual space;
(d) when a variation over time of at least one of the location, the angle, and the angle of view of the camera of the camera information exceeds the camera operation limit, calibrating, by the processor, the camera information to a value within a range of the camera operation limit; and
(e) after performing (d), generating, by the processor, image frames in real time by incorporating the object replay information and the camera information calibrated in (d) and displaying the image frames on a screen continuously for replaying a game play situation.
2. The method of claim 1 , wherein
in (a), the camera operation limit is set and stored in the form of an upper limit of a first derivative of the location, the angle, and the angle of view of the camera with respect to time, and
in (d), when an absolute value of a first differential coefficient with respect to time of at least one of the location, the angle, and the angle of view of the camera information exceeds the camera operation limit, the camera information is calibrated to a value of the camera operation limit.
3. The method of claim 1 , wherein
in (a), the camera operation limit is set and stored in the form of an upper limit of a second derivative with respect to time of the location, the angle, and the angle of view of the camera, and
in (d), when an absolute value of a second differential coefficient with respect to time of at least one of the location, the angle, and the angle of view of the camera information exceeds the camera operation limit, the camera information is calibrated to a value of the camera operation limit.
4. The method of claim 1 , wherein (d) is performed only when a game replay video to be generated in (e) is a virtual reality (VR) video.
5. The method of claim 2 , wherein (d) is performed only when a game replay video to be generated in (e) is a virtual reality (VR) video.
6. The method of claim 3 , wherein (d) is performed only when a game replay video to be generated in (e) is a virtual reality (VR) video.