2014/10/15 下午 10:08:30

iphone Programming Glossary: estimation

http://stackoverflow.com/questions/13613239/drifting-yaw-angle-after-moving-fast

API. Starting with version 5 the magnetometer compass is considered for sensor fusion as well. Console shows that bias estimations from locationd are provided to CoreMotion locationd 41 Notice GYTT inserted bias 0.196419 1.749323 1.828088 variance 0.002644.. but it doesn't affect Core Motion. If not possible what is the alternative workaround Accelerometer based gravity estimation PS As we are dealing with quaternion based models this is not related to Gimbal Lock EDIT After doing some more measurements..

Is there any way at all that I can tell how hard the screen is being pressed

http://stackoverflow.com/questions/2103447/is-there-any-way-at-all-that-i-can-tell-how-hard-the-screen-is-being-pressed

information it gives the major radius of the touch in millimeters. You can therefore give an extremely rough estimation if it's a heavy touch or light touch from the radius. void touchesBegan NSSet touches withEvent UIEvent event GSEventRef..

C/C++/Obj-C Real-time algorithm to ascertain Note (not Pitch) from Vocal Input

http://stackoverflow.com/questions/4062099/c-c-obj-c-real-time-algorithm-to-ascertain-note-not-pitch-from-vocal-input

Try AMDF ASDF autocorrelation or cepstral methods. There are also plenty of academic papers on the subject of pitch estimation. There is another long list of pitch estimation algorithms here . Edited addition Apple's SpeakHere and aurioTouch sample.. There are also plenty of academic papers on the subject of pitch estimation. There is another long list of pitch estimation algorithms here . Edited addition Apple's SpeakHere and aurioTouch sample apps available from their iOS dev center contain..

FFT on iPhone to ignore background noise and find lower pitches

http://stackoverflow.com/questions/7181630/fft-on-iphone-to-ignore-background-noise-and-find-lower-pitches

in the Accelerate framework might give you directly . So any peak frequency detector will not be reliable for pitch estimation. A low pass filter will not help when the note has a missing or very weak fundamental common in some voice piano and guitar..