公开(公告)号：US20140362052A1

公开(公告)日：2014-12-11

申请号：US14369085

申请日：2013-01-17

Applicant: Light Blue Optics Ltd

Inventor： Gareth John McCaughan ,  Adrian James Cable ,  Euan Christopher Smith ,  Paul Richard Routley ,  Raul Benet Ballester

IPC: G06F3/042

CPC classification number: G06F3/0421 ,  G06F3/0418 ,  G06F3/0425 ,  G06F3/0426

Abstract: We describe a touch sensitive image display device. The device comprises: an image projector to project a displayed image onto a surface in front of the device; a touch sensor light source to project light defining a touch sheet above the displayed image; a camera directed to capture a touch sense image comprising light scattered from the touch sheet by an object approaching the displayed image; and a signal processor to process a the touch sense image to identify a location of the object relative to the displayed image. The camera is able to capture an image projected by the image projector, the image projector is configured to project a calibration image, and the device includes a calibration module configured to use a calibration image from the projector, captured by the camera, to calibrate locations in said captured touch sense image with reference to said displayed image.

Abstract translation: 我们描述一种触敏图像显示设备。 该装置包括：图像投影仪，用于将显示的图像投影到装置前面的表面上; 触摸传感器光源，用于投影在显示图像上方定义触摸板的光; 一种照相机，用于捕获包含从​​接触片散射的光的触摸感测图像，该对象接近所显示的图像; 以及信号处理器，用于处理所述触摸感测图像以识别所述对象相对于所显示的图像的位置。 相机能够捕获由图像投影仪投影的图像，图像投影仪被配置为投影校准图像，并且该装置包括校准模块，该校准模块被配置为使用来自投影仪的校准图像，由相机拍摄，以校准位置 参考所述显示的图像在所述捕获的触摸感测图像中。

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.