Sharing physical writing surfaces in videoconferencing
AssigneeDolby Laboratories Licensing Corporation
InventorsTimothy Alan Port, Richard J. Cartwright
Life of this patent
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Abstract
An apparatus and method relating to use of a physical writing surface (132) during a videoconference or presentation. Snapshots of a whiteboard (132) are identified by applying a difference measure to the video data (e.g., as a way of comparing frames at different times). Audio captured by a microphone may be processed to generate textual data, wherein a portion of the textual data is associated with each snapshot. The writing surface may be identified (enrolled) using gestures. Image processing techniques may be used to transform views of a writing surface.
Claims17
A method of generating a record of content appearing on a physical surface and captured on video, the method comprising:
- generating, by a video camera, video data that includes image data of the physical surface;
- identifying, in an identifier component, by applying a difference measure to the video data, at least one period of interest in the video data by receiving an uncompressed video stream representing the video data and performing encoding on the uncompressed video stream to generate a compressed video stream in an encoder component, transmitting the compressed video stream from the encoder component to a decoder component, and performing decoding of the compressed video stream in the decoder component to generate decompressed video data, wherein the encoder component is placed in a transmitting endpoint and the decoder component placed in a receiving endpoint, wherein the decompressed video data includes a plurality of intra-frames;
- for each period of interest of the at least one period of interest, selecting, in an image selector component, a still image of the image data of the physical surface;
- wherein the still image is selected from the plurality of intra-frames of the period of interest;
- and
- generating a set of images that includes each still image for the at least one period of interest in the video data, wherein the set of images provides snapshots of the content appearing on the physical surface.
A system for generating a record of content appearing on a physical surface and captured on video, the apparatus comprising:
- a transmitting endpoint;
- a receiving endpoint;
- wherein the transmitting endpoint comprises a video camera configured to generate video data, wherein the video data includes image data of the physical surface;
- and an encoder component configured to generate a compressed video stream from an uncompressed video stream representing the video data;
- wherein the receiving endpoint comprises a decoder component configured to generate decompressed video data, wherein the decompressed video data includes a plurality of intra-frames, an identifier component executed by a processor configured to control the system to identify, by applying a difference measure to the video data, at least one period of interest in the video data, and an image selector component executed by the processor configured to control the system to select, for each period of interest of the at least one period of interest, a still image of the image data of the physical surface, wherein the still image is selected from the plurality of intra-frames of the period of interest, wherein the intra-frames correspond to still images;
- wherein the processor is configured to control the system to generate a set of images that includes each still image for the at least one period of interest in the video data,
- wherein the set of images provides snapshots of the content appearing on the physical surface.
Dependencies are inferred from the claim text.