过滤掉来自Android的倾斜（加速度计和磁场）的传感器的噪声？
所以，我已经实现了Android上的一个简单的应用程序，使得我倾斜手机的方向球滚动。然而，它是不可能让球还是由于传感器值continously改变，即使我想我还拿着它。
So I have implemented a simple app on Android that makes the ball roll in the direction I tilt the phone. However it is impossible to keep the ball still since the sensor values are continously changing even if I think I am holding it still.
所以我猜我想要的那朵过滤掉小的变化？使用某种lowpassfilter的？
So I guess what I want tis filter away small changes? Using some sort of lowpassfilter?
所以，我会怎么做呢？保留旧rotationMatrix而不做任何修改，如果差不大于某一阈值更大？
So how would I do that? Keep the old rotationMatrix and not do any changes if the difference is not bigger than some threshold?
如果你想在方向的球滚动你倾斜我建议使用在X和Y方向陀螺仪试图电话。然而，加速度计和陀螺仪的组合，可以给你更好的结果。
If you want to make the ball roll in the direction you tilt the phone I suggest trying using the gyroscope in x and y directions. However, a combination of accelerometer and gyroscope can give you better results.
这是一个不错的视频，了解传感器如何工作的。它解释了如何传感器收购移动设备，以及如何最大限度地减少使用sensorfusion和滤波技术，错误的数据。
This is a good video to understand how the sensors work. It explains how the sensors acquire the data in mobile devices and how to minimize the error using sensorfusion and filtering techniques.