motion

I'm trying to calculate a new camera position based on the motion of corresponding images. the images conform to the pinhole camera model. As a matter of fact, I don't get useful results, so I try to describe my procedure and hope that somebody can help me. I match the features of the corresponding images with SIFT, match them with OpenCV's FlannBasedMatcher and calculate the fundamental matrix with OpenCV's findFundamentalMat (method RANSAC). Then I calculate the essential matrix by the camera intrinsic matrix (K): Mat E = K.t() * F * K; I decompose the essential matrix to rotation and

I saw that someone has made an app that tracks your feet using the camera, so that you can kick a virtual football on your iPhone screen. How could you do something like this? Does anyone know of any code examples or other information about using the iPhone camera for detecting objects and tracking them? I just gave a talk at SecondConf where I demonstrated the use of the iPhone's camera to track a colored object using OpenGL ES 2.0 shaders. The post accompanying that talk, including my slides and sample code for all demos can be found here . The sample application I wrote, whose code can be

I need suggestion about how to detect the amount of movement of an android device. Suppose I have put the phone on a table or bed and then if somebody taps the table or sits or laydown on the bed then I want to detect the movement of the android device. Actually I know that android has motion sensors APIs but I don't know which sensor to use and what sensor type is best for this type of movement detection. I would be glad if someone can share some basic demo code. Definitely work with the accelerometer: // Start with some variables private SensorManager sensorMan; private Sensor accelerometer;

I am running into a bit of a problem when I attempt to use (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event in order to capture a shake event. The problem is that the function isn't even running, even when I override canBecomeFirstResponder and set it to return YES. I have seen some other people's posts with this problem, but I have not found an answer. Thanks for any help! First Example .h (class inherited from UIView - Is "called" from the app delegate class) { @class TestApplicationView; @interface TestApplicationView : UIView { IBOutlet UIView *view; } } First Example .m