Method and system for determining reference points in video image frames

摘要

A videoconferencing system for determining alignment information for images captured by two or more cameras is disclosed. The videoconferencing system can include a plurality of endpoints and at least one control unit (CU) such as a multipoint control unit (MCU), for example. An endpoint can include a plurality of cameras and at least one projector. The projector is used to project a pattern at the near end site, which pattern is captured by the plurality of cameras. The image frames produced by the cameras are processed to determine the identity and location coordinates of the images of the projected patterns. The location coordinates can be used as reference points to be used by applications such as telepresence, 3D videoconferencing, and morphing.

主权项

1. A method performed by a control unit (CU) for aligning two or more video image frames received from two or more video cameras at an endpoint, the endpoint communicably connected to the CU via a communication network, comprising:
receiving two or more reference image frames from the endpoint; and determining two or more reference points, each reference point located in at least two of the two or more video image frames, the two or more reference points derived from location coordinates of a same spot of a projected reference image captured in the two or more reference image frames, wherein the projected reference image includes a plurality of patterns, and wherein the same spot corresponds to one of the plurality of patterns.