How to fix touch input accuracy on Android commercial tablets

How to Calibrate the Touchscreen on RK3288 android commercial Tablet

1. Tools prepare

    a) Calibrate prepare app
    b) eGalaxCalibrator Calibrate app
    c) USB interface Mouse

2. Install the  apps

    a) Calibrate prepare app install
    b) eGalaxCalibrator Calibrate app install

3. Run "Prepare Calibrator app"

4. Run eGalaxCalibrator Calibrate app

    a). Before run "eGalaxCalibrator Calibrate app", You need plug the usb mouse and then click the right button to exit  "Prepare Calibrator app".