我记得几天前在示例中的某处看到了一个高通滤波器的代码，但是我现在在任何地方都找不到它！有人可以记得我的高通滤波器实现代码在哪里吗？

还是更好地发布算法？

谢谢！

解决方案

从idevkit.com论坛：

#define kFilteringFactor 0.1
static UIAccelerationValue rollingX=0, rollingY=0, rollingZ=0;

- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {

    // Calculate low pass values

    rollingX = (acceleration.x * kFilteringFactor) + (rollingX * (1.0 - kFilteringFactor));
    rollingY = (acceleration.y * kFilteringFactor) + (rollingY * (1.0 - kFilteringFactor));
    rollingZ = (acceleration.z * kFilteringFactor) + (rollingZ * (1.0 - kFilteringFactor));

    // Subtract the low-pass value from the current value to get a simplified high-pass filter

    float accelX = acceleration.x - rollingX;
    float accelY = acceleration.y - rollingY;
    float accelZ = acceleration.z - rollingZ;

    // Use the acceleration data.

}

万一有人想知道，可以在加速计图示例中找到高通滤波器。