Hewlett-packard Development Company, L.P.

Plantronics, Inc.

Hp (chongqing) Co., Ltd

Poly, Inc.

Tianran Wang

Wenxue He

Hailin Song

Hai Jun Xu

Xi Lu

Yongkang Fan

Hai Xu

Lidan Qin

Systems and methods are provided for identifying and displaying whiteboard text and/or an active speaker in a video-based presentation, e.g., a video conference. Video images of an environment including a whiteboard may be captured by a video camera system. The video images may be analyzed to detect at least one text-containing area in the environment. Each text-containing area may be analyzed to determine whether it is an area of a whiteboard. When a text-containing area is identified as a whiteboard area, an area of view including the text-containing whiteboard area may be selected for display, e.g., a subset of the full frame captured by the video system. A video feed from the video camera system may be controlled to display the selected area of view at a client device, to provide a useful view of the whiteboard text and/or a speaking person located near the whiteboard text.

Systems and methods for detection and display of whiteboard text and/or an active speaker

A method includes receiving, at a conference endpoint, video captured using a wide angle lens. The method further includes selecting a view region in a frame of the video. The method further includes selectively applying, based on a size of the view region, deformation correction or distortion correction to the view region to generate a corrected video frame. The method further includes transmitting the corrected video frame to a remote endpoint.

Selective distortion or deformation correction in images from a camera with a wide angle lens

A method () for operating cameras () in a cascaded network (), comprising: capturing a first view () with a first lens () having a first focal point () and a first centroid (), the first view () depicting a subject (); capturing a second view () with a second lens () having a second focal point () and a second centroid (); detecting a first location of the subject (), relative the first lens (), wherein detecting the first location of the subject (), relative the first lens (), is based on audio captured by a plurality of microphones (); estimating a second location of the subject (), relative the second lens (), based on the first location of the subject () relative the first lens (); selecting a portion () of the second view () as depicting the subject () based on the estimate of the second location of the subject () relative the second lens ().

Optimal view selection in a teleconferencing system with cascaded cameras

A videoconferencing endpoint is described that uses a combination of face detection, motion detection, and upper body detection for selecting participants of a videoconference for group framing. Motion detection is used to remove fake faces as well as to detect motion in regions around detected faces during postprocessing. Upper body detection is used in conjunction with the motion detection in postprocessing to allow saving faces that have been initially detected by face detection for group framing even if the participant has turned away from the camera, allowing the endpoint to keep tracking the participants region better than would be possible based only on an unstable result coming from face detection.

Joint use of face, motion, and upper-body detection in group framing

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Beijing, China

Tianran Wang