我记得几天前在示例中的某个地方看到了高通滤波器的代码,但是我现在在任何地方都找不到它!有人能记得我高通滤波器实现代码在哪里吗?
或者更好地发布算法?
谢谢!
#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,高通滤波器可以在Accelerometer Graph sample中找到。
这是链接,我也在找这个。这是自适应/非自适应高通和低通滤波器的示例:Apple iOS Reference Library - AccelerometerGraph Example