公开(公告)号：US20180040111A1

公开(公告)日：2018-02-08

申请号：US15550732

申请日：2016-02-12

Applicant: Light Blue Optics Ltd.

Inventor： Raul BENET BALLESTER ,  Eyal KATZ ,  Barak MAOZ ,  Adrian James CABLE ,  Euan Christopher SMITH ,  Gareth John MCCAUGHAN ,  Shane Thornton

IPC: G06T5/00 ,  G06T7/254

Abstract: We describe a method of capturing writing or drawing on a whiteboard. The method comprises: inputting camera data for a succession of image frames, wherein the camera data is from a camera directed towards the whiteboard and the image frames comprise successive images of the whiteboard from the camera; and 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. The user-filter processing comprises filtering to distinguish between motion of the user/user pen parts in the image frames and writing/drawing image information in the image frames which appears or changes during said writing or drawing but which is thereafter substantially unchanging. The method outputs writing/drawing data from the user filter-processing, this defining captured writing or drawing from the whiteboard.

公开(公告)号：US11494882B2

公开(公告)日：2022-11-08

申请号：US16709099

申请日：2019-12-10

Applicant: Light Blue Optics Ltd.

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

IPC: G06T5/00 ,  G06T7/254

Abstract: An image capture system comprises a camera configured to capture an image of a whiteboard, or similar, viewed from an acute angle. A linear polarizer has a surface substantially perpendicular to a plane of the board and an axis of polarization substantially perpendicular to the plane of the board or within 30° of the perpendicular to the plane of the board. The camera is configured to capture the image of the board through the polarizer. A normal to the polarizer is directed in a different direction to a direction defined by an optic axis of the camera.

公开(公告)号：US10540755B2

公开(公告)日：2020-01-21

申请号：US15550732

申请日：2016-02-12

Applicant: Light Blue Optics Ltd.

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

IPC: G06T5/00 ,  G06T11/60 ,  H04N5/04 ,  G06T7/254

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.