Handwriting input system
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United States of America Patent
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Nov 3, 2015
Grant Date -
Mar 6, 2014
app pub date -
Aug 30, 2013
filing date -
Sep 4, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
Dot mark decoding circuitry sets an initial value of a relative position of each of dot marks with respect to a corresponding lattice point; and then sequentially executes, in repetition, a calculation process of calculating a projective transformation matrix based on a position of each dot mark in a pixel coordinate system and a position obtained by adding the relative position to the position of a corresponding lattice point; a transformation process of transforming the position of each dot mark from the position in the pixel coordinate system to a position in a L coordinate system using the projective transformation matrix; a generation process of generating the relative position information based on the post-transformation position of each dot mark and the position of the corresponding lattice point; and an update process of updating the relative position in accordance with the relative position information.
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Cited Art Landscape
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