Patent
Optical stylus and passive digitizing tablet data input system
William E. Bennett,Stephen J. Boies,Anthony Robin Davies,Karl-Friedrich Etzold,Todd Kanner Rodgers +4 more
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TLDR
In this paper, a stylus and table X-Y data input system for a video display system is presented, where absolute positional information is encoded in binary form in the tablet in such a fashion that the pen position upon the tablet is automatically determinable by illuminating a particular area of the tablet and reading off the digitized XY coordinate data stored therein.Abstract:
A stylus and table X-Y data input system for a video display system. The pen includes an optical styling having a suitable pickup mechanism and the tablet is passive in nature and provides direct digitized data readout. Absolute positional information is encoded in binary form in the tablet in such a fashion that the pen position upon the tablet is automatically determinable by illuminating a particular area of the tablet and reading off the digitized X-Y coordinate data stored therein. The pen and supporting hardware/software are rotationally insensitive so that the pen may be held in any desired position comfortable to a user. The system provides greatly improved resolution, sampling rate accuracy and general robustness particularly for such applications as text recognition as well as a wide variety of other graphical input uses.read more
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References
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Dynamically variable machine readable binary code and method for reading and producing thereof
TL;DR: In this paper, a machine readable binary code which is dynamically variable in size, format and density of information is provided, where the binary code is formed as a matrix having a perimeter and data contained therein.
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Code and reading system
TL;DR: In this article, a code reading system is disclosed utilizing a novel, multicolored, densely packed code read by a scanner which is placed over the code and held in place while the scanner performs its reading function.
Patent
Method and apparatus for capturing information in drawing or writing
TL;DR: In this article, the authors used the Baum-Welch algorithm to calculate the probability that the vertical and horizontal components of the pen tip and the contacts between pen tip with the writing area could have been produced from the hidden Markov model.
Patent
Memory card comprising an optical memory disc and microelectronic memory component, and apparatus for transferring information to and from such card
TL;DR: In this article, the authors present an approach for transferring data and other information between a data processing unit and a rectangular memory card which includes an optically readable data memory unit having a succession of concentric data storage tracks thereon, the card also including at least one microelectronic component which stores further information.
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Optical cursor control device
TL;DR: In this article, an optical cursor control device or "optical mouse" is disclosed for use with an interactive display oriented computer system to provide movement for a visible cursor from position to position on a display screen of such a system.