Research on Multi-Point Calibration and Touch Pressure of Touch-Screen

Abstract:

In view of the inaccuracy and low sensitivity of resistive touch-screen in small point target environment, two measures were proposed. First, based on the existing three-point calibration algorithm, more points were sampled to improve coordinate conversion precision, greedy algorithmm reduced the random calibration point set, and least squares algorithm fit the final calibration coefficients. Another measure was to utilize the touch pressure measurement and pressure threshold decision to remove invalid click. Finally, test results show that multi-point calibration with greedy algorithm can improve the precision of coordinate calibration, and the adoption of pressure decision can effectively enhance the system’s adaptability to touch intensity.

• Periodical: Applied Mechanics and Materials (Volumes 198-199)
• Pages: 1290-1293
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.198-199.1290
• Online since: September 2012
• Authors: Xiu Hong Jiang, Fu Hai Duan, Rui Guo
• Keywords: Greedy Algorithm, Least Square (LS), Touch Pressure, Touch-Screen

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