US 10,540,755 B2Granted

Image processing systems and methods

AssigneeLight Blue Optics Ltd.

InventorsRaul Benet Ballester, Eyal Katz, Barak Maoz, Adrian James Cable, Euan Christopher Smith, Gareth John McCaughan, Shane Thornton

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Abstract

A method of capturing writing or drawing on a whiteboard comprises inputting camera data for a succession of image frames of the whiteboard, and processing data from said image frames to remove parts of the image frames corresponding to parts of a user or user pen writing or drawing on the whiteboard. The processing involves filtering to distinguish between i) motion of the user/user pen parts in the image frames, and ii) writing/drawing image information in the image frames which appears or changes during said writing or drawing but which is thereafter substantially unchanging. The filtered data defines captured writing or drawing from the whiteboard.

Claims19

Dependent claims

A method of capturing writing or drawing on a whiteboard, the method comprising:

inputting camera data for a succession of image frames, wherein said camera data is from a camera directed towards said whiteboard and said image frames comprise successive images of said whiteboard from said camera;
user filter processing data from said image frames to remove parts of said image frames corresponding to parts of a user or user pen writing or drawing on said whiteboard;
wherein said user filter processing comprises:
temporally filtering said image frames with a user filter time constant to distinguish said user/pen from said writing or drawing on said whiteboard;
and filtering to distinguish between motion of said user/user pen parts in said image frames and writing/drawing image information in said image frames which appears or changes during said writing or drawing but which is thereafter substantially unchanging;
and
outputting writing/drawing data from said user filter processing, wherein said writing/drawing data defines captured writing or drawing on said whiteboard.

4 more elements

Whiteboard sharing apparatus comprising:

a camera to be directed to capture an image from a whiteboard;
and
signal processing apparatus, coupled to said camera and configured to:
input camera data for a succession of image frames, wherein said camera data is from a camera directed towards said whiteboard and said image frames comprise successive images of said whiteboard from said camera
user filter process data from said image frames to remove parts of said image frames corresponding to parts of a user or user pen writing or drawing on said whiteboard;
wherein said user filter processing comprises:
temporally filtering said image frames with a user filter time constant to distinguish said user/pen from said writing or drawing on said whiteboard;
and filtering to distinguish between motion of said user/user pen parts in said image frames and writing/drawing image information in said image frames which appears or changes during said writing or drawing but which is thereafter substantially unchanging;
and
output writing/drawing data from said user filter processing, wherein said writing/drawing data defines captured writing or drawing on said whiteboard.

7 more elements

Dependencies are inferred from the claim text.