Calibrating a physical space for multi-camera video stream selection for in-person conference participants

A non-transitory computer readable medium storing instructions operable to cause one or more processors to perform operations comprising:

• identifying matched points using a first camera and a second camera as a person moves within a physical space;
• solving multiple candidate physical space calibration matrices, each corresponding to a set of the matched points selected at random;
• counting a number of inliers for each candidate physical space calibration matrix using the matched points not used for solving the candidate physical space calibration matrix;
• selecting a physical space calibration matrix having a highest number of inliers from the multiple candidate physical space calibration matrices;
• and
• using, during a video conference, the physical space calibration matrix to determine whether a first bounding box of a first person captured by the first camera and a second bounding box of a second person captured by the second camera identify a single conference participant within the physical space.

An apparatus, comprising:

• a memory;
• and
• a processor configured to execute instructions stored in the memory to:
• identify matched points using a first camera and a second camera as a person moves within a physical space;
• solve multiple candidate physical space calibration matrices, each corresponding to a set of the matched points selected at random;
• count a number of inliers for each candidate physical space calibration matrix using the matched points not used for solving the candidate physical space calibration matrix;
• select a physical space calibration matrix having a highest number of inliers from the multiple candidate physical space calibration matrices;
• and
• use, during a video conference, the physical space calibration matrix to determine whether a first bounding box of a first person captured by the first camera and a second bounding box of a second person captured by the second camera identify a single conference participant within the physical space.