how to calibrate accelerometer

increases the computing time. The process is as follows: Coordinate Conversion for Android: this implementation is a linear transformation using 7 Parameters(A, B, C, D, E, F and S) to transform the device coordinates (XD, YD) into screen coordinates (XS, ys) using the following equations: S * xs = A * XD + B * YD + cS * ys = D * XD + E * YD + FWhere: XS, YS: LCD coordinates; XD, YD: Touch screen coordinates. (2) debugging: Touch screen positioning is always inaccurate, there will be offset. Af

11 sensors in Android operating system In the Android2.3 gingerbread system, google provides 11 sensors for the application layer. # Define SENSOR_TYPE_ACCELEROMETER 1 // Acceleration # Define SENSOR_TYPE_MAGNETIC_FIELD 2 // magnetic # Define SENSOR_TYPE_ORIENTATION 3 // direction # Define SENSOR_TYPE_GYROSCOPE 4 // Gyroscope # Define SENSOR_TYPE_LIGHT 5 // light sensing # Define SENSOR_TYPE_PRESSURE 6 // pressure # Define SENSOR_TYPE_TEMPERATURE 7 // Temperature # Define SENSOR_TYPE_PROXIMITY

usually obtain data by measuring attributes of special environments, such as changes in gravity acceleration, geomagnetic intensity, or azimuth angle. Software-based sensors do not rely on physical devices, though they mimic hardware-based sensors. Software-based sensors usually obtain data through one or more hardware sensors, and sometimes call virtual sensors or artificial sensors, linear accelerometer and gravity sensor are examples of software-b

Cocos2DLearning notesUIAccelerometerCase implementation is the content to be introduced in this article, mainly to understandUIAccelerometer.UIAccelerometerIt is used to detect the acceleration of the iphone on the x. y. Z axis. To obtain such calls. UIAccelerometer*accelerometer=[UIAccelerometersharedAccelerometer]; At the same time, you need to set its delegate. UIAccelerometer*accelerometer=[

Interval corresponding to 60000 microseconds * SensorManager. SENSOR_DELAY_NORMAL = 3: Update Interval corresponding to 200000 microseconds * when you type a custom int value x: Update Interval corresponding to x microseconds **/mSensorManager. registerListener (this, mSensor, SensorManager. SENSOR_DELAY_NORMAL);}/*** Step 5: unregister the sensor when the focus is lost */@ Override protected void onPause () {super. onPause (); mSensorManager. unregisterListener (this );}} To sum up, there are

1. Cell phone's coordinate chart The Core Motion Motion Manager lets you specify how often (in seconds) to receive updates from the accelerometer and gyroscope, and lets you specify a handler block directly (handle block), which executes the handler block whenever the update is ready. The actual acceleration is broken down into two parts in core motion: Gravity and Useracceleration. Gravity represents gravity 1g in the distribution of equipment, us

. fillrect (rect (), QT: White ); Qpoint point = data. screenpoints [presscount]; // Map to logical coordinates in case the screen is transformedQsize screensize (qt_screen-> devicewidth (), qt_screen-> deviceheight ());Point = qt_screen-> mapfromdevice (point, screensize ); P. fillrect (point. X ()-6, point. Y ()-1, 13, 3, QT: Black );P. fillrect (point. X ()-1, point. Y ()-6, 3, 13, QT: Black );}//! [5] //! [6]Void calibration: mousereleaseevent (qmouseevent * event){// Map from device coordin

Android open-source project Sensors The android open-source project (aosp) provides three software-based mobile sensors: gravity sensor, linear acceleration sensor, and rotation vector sensor. These three sensors are updated in android4.0 and both use Gyroscope (except for other sensors) to improve stability and performance. If you want to try these sensors, you can identify them by using the getvendor () method and getversion () method (vendor: Google Inc; version: 3 ). It is necessary to ident

There are two methods for the current program to detect mobile phone shaking. The first method is to override the gesture method in the UIResponder class (which can be simulated by a simulator ), the second method is to use Accelerometer to check whether the mobile phone is shaking (you can only test it on a real machine ). Method 1: It takes only three steps: let the current ViewController support shaking gestures, make the current View the first res

Win7 system how to set up and debug game handles 1, first in the computer host insert handle, such as the computer installed its own drive, in the "Start" menu, select "Equipment and Printers" to set; 2, open "equipment and printers" after the selection of computer-connected game handle icon; 3, right key game handle's icon to set up. Then click the "Properties" button in the lower-right corner of the "game controller" setting interface. 4. Under the "Test

cvstereocalibrate, which is used to calibrate the relative positions and rotation angles of two cameras. Of course, to call this function requires a lot of preparation in advance. First, opencv uses the method in Zhang zhengyou's paper to calibrate the camera. Therefore, a black and white board is required. You only need to print one and paste it on the plane. I used a chessboard under the opencv installat

1, first in the computer host insert handle, such as the computer installed its own drive, in the "Start" menu, select "Equipment and Printers" to set; 2, open "equipment and printers" after the selection of computer-connected game handle icon; 3, right key game handle's icon to set up. Then click the "Properties" button in the lower-right corner of the "game controller" setting interface. 4. Under the "Test" tab, we can test whether the buttons of the hand

that there is no end. But every time you pass a level, it will cause more trouble to the player after you because he or she will get another ball! Isn't it funny? This is the life in the maze. This game is perfect for those who are in the same place, and everyone has a mobile phone team. This is very common today. There is also a video explaining the requirements of the game system. The most important condition for system operation is the accelerometer