2014/10/15 下午 10:04:34

iphone Programming Glossary: bias

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.. 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 0.004651 0.002527 temperature 31.554688 My question s Is there chance to block..

Check if UIColor is dark or bright?

http://stackoverflow.com/questions/2509443/check-if-uicolor-is-dark-or-bright

color brightness calculation above. If it is below 125 use white text. If it is 125 or above use black text. edit 1 bias towards black text. edit 2 The formula to use is Red value 299 Green value 587 Blue value 114 1000. share improve this..

PCM audio amplitude values?

http://stackoverflow.com/questions/5890499/pcm-audio-amplitude-values

canonical way to randomize an NSArray in Objective C

http://stackoverflow.com/questions/791232/canonical-way-to-randomize-an-nsarray-in-objective-c

to do it @interface NSMutableArray ArchUtils_Shuffle void shuffle @end Chooses a random integer below n without bias. Computes m a power of two slightly above n and takes random modulo m then throws away the random number if it's between.. throws away the random number if it's between n and m. More naive techniques like taking random modulo n introduce a bias towards smaller numbers in the range. static NSUInteger random_below NSUInteger n NSUInteger m 1 Compute smallest power..

Is there any way to remove the small bias along the gravity axis in the accelerometer data

http://stackoverflow.com/questions/9074947/is-there-any-way-to-remove-the-small-bias-along-the-gravity-axis-in-the-accelero

there any way to remove the small bias along the gravity axis in the accelerometer data Similar to this question CMDeviceMotion userAcceleration drift I'm using.. x and y components are centering along zero 0.005 0.005 when my iPhone 4s is sitting on a flat surface. This small bias keeps adding up to the estimated velocity which I compute by integrating the acceleration data even when my phone is not.. by integrating the acceleration data even when my phone is not moving a bit. Is there any known way to remove this bias from the accelerometer data I cannot simply subtract the bias from z component because it seems that the bias spreads over..