Calibration in Touch-Screen Systems
By Rend at 10 March, 2010, 5:35 am
This application note explains about Calibration in touch-screen systems. The issue about Calibration in touch-screen systems is presented inside the introduction. The main topic of this application notes is divided into 6 section : Introduction, Touch-coordinate errors, Mathematical expression, Calibration methods, Calibration algorithms, and Algorithm implementation.
The section Touch-coordinate errors explains about a measurement of the X and Y coordinates, the Touch-coordinate errors, and Electrical noise. The Mathematical expression and Calibration of the touch screen translates the coordinates are explained in the section Mathematical expression. Calibration methods presents Three-point calibration and Five-point calibration explaination. Calibration algorithms section explain about Cramer’s rule, Three-point calibration algorithm and n-point calibration algorithm. How to implement the preceding calibration algorithms is explained is section Algorithm implementation.
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