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2014/10/16 ¤W¤È 08:11:00
android Programming Glossary: calibrationhttp://stackoverflow.com/questions/2232074/opencv-ndk-android-help the new API is C . A port of this interface and sample calibration app are here http code.google.com p android opencv It took me..
Getting decibel from an android microphone http://stackoverflow.com/questions/4271989/getting-decibel-from-an-android-microphone without ALC. From then on its basically all about the calibration and log magnitude. Essentially you will multiply or convolve.. you will multiply or convolve by a frequency dependent calibration and then take 10 the log magnitude over all or some of the frequency.. some of the frequency range. Then you'd have to take some calibration measurements for example frequency sweeping a lab source of..
android compass seems unreliable http://stackoverflow.com/questions/6256256/android-compass-seems-unreliable beyond me and in limited testing on a single device after calibration this will appear to work but in the field using many devices.. but many of those took 2 10 try's we verified after each calibration attempt with a high precision compass and more than a few times.. local magnetic fields. Fith cold starts always require the calibration step on every phone we tested which includes the X the incredible..
Android accelerometer accuracy (Inertial navigation) http://stackoverflow.com/questions/7829097/android-accelerometer-accuracy-inertial-navigation in the X and Y directions. I would expect given the calibration that these accelerations should add up to 0 roughly in each.. in advance. android physics accelerometer acceleration calibration share improve this question You get position by integrating..
http://stackoverflow.com/questions/2232074/opencv-ndk-android-help C interface OpenCV actually considers it deprecated done with the new API is C . A port of this interface and sample calibration app are here http code.google.com p android opencv It took me a while to get sold on the new C but I had to admit it was..
Getting decibel from an android microphone http://stackoverflow.com/questions/4271989/getting-decibel-from-an-android-microphone to look to find out how to record samples from the microphone without ALC. From then on its basically all about the calibration and log magnitude. Essentially you will multiply or convolve by a frequency dependent calibration and then take 10 the log.. all about the calibration and log magnitude. Essentially you will multiply or convolve by a frequency dependent calibration and then take 10 the log magnitude over all or some of the frequency range. Then you'd have to take some calibration measurements.. calibration and then take 10 the log magnitude over all or some of the frequency range. Then you'd have to take some calibration measurements for example frequency sweeping a lab source of controlled known spl and recording the resulting amplitude vs..
android compass seems unreliable http://stackoverflow.com/questions/6256256/android-compass-seems-unreliable sensor why they could not do this on the newer method is beyond me and in limited testing on a single device after calibration this will appear to work but in the field using many devices I have found that for the most part the reliability is always.. were pretty close to accurate IF you could calibrate properly but many of those took 2 10 try's we verified after each calibration attempt with a high precision compass and more than a few times they would simply NOT calibrate at all. NOTE you do have.. not an issue anyway since it will also be effected by local magnetic fields. Fith cold starts always require the calibration step on every phone we tested which includes the X the incredible the Aria the Nexus and the Thunderbolt. In other words..
Android accelerometer accuracy (Inertial navigation) http://stackoverflow.com/questions/7829097/android-accelerometer-accuracy-inertial-navigation placing it on the table and sampling 5000 accelerometer readings in the X and Y directions. I would expect given the calibration that these accelerations should add up to 0 roughly in each direction. However this is not the case and the total acceleration.. that I've made some errors in my coding Thanks for your help in advance. android physics accelerometer acceleration calibration share improve this question You get position by integrating the linear acceleration twice but the error is horrible...
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