|
Invention relates to input devices for generating uniform electronic tags. The universal input device provides a general user interface with different computer platforms which include printed documents. Using this system, is possible to use the universal input device to control different computer devices, as well as capturing handwritten electronic tags and association of the electronic tags with new or stored documents. The universal input device can be identified through unique identification, providing many users with the possibility to work with a document and/or with one application program at the same time or in turns. The shifted optical system with infrared illumination processes the viewpoint and helps detect position coding, which when illuminated with visible light may be covered with existing ink. |
|
Imaging between camera and tip of pen and calibration Invention relates to input devices. The x-y positions of a digital pen can be determined using a calibration parametre for imaging the x-y position of corresponding image centres, captured by the camera of the pen. The calibration parametre can be generated from iterative calculation of calibration parametre evaluations. Input calibration data can be obtained when a user places the tip of the pen into a fixed position on a surface, which can be a carrier with position coding, such as paper, with subsequent rotation of the pen and/or movement of the opposite end of the pen in different directions, for capturing several images, meant for use when generating the calibration parametre. |
Another patent 2513377.