augmented-reality

Android getOrientation Azimuth gets polluted when phone is tilted

For complete code see https://github.com/hoananguyen/dsensor Keep a history and average out, I do not know the correct interpretation of pitch and roll so the following code is for azimuth only. Class members private List<float[]> mRotHist = new ArrayList<float[]>(); private int mRotHistIndex; // Change the value so that the azimuth is stable and fit your requirement … Read more

ARKit – What do the different columns in Transform Matrix represent?

ARKit, RealityKit and SceneKit frameworks use 4 x 4 Transformation Matrices to translate, rotate, scale and shear 3D objects (just like simd_float4x4 matrix type). Let’s see how these matrices look like. In 3D Graphics we often use a 4×4 Matrix with 16 useful elements. The Identity 4×4 Matrix is as following: Between those sixteen elements … Read more

augmented reality framework [closed]

For ideas, you could look at the following: Existing Apps and their APIs: There are number of Augmented Reality applications in the Android market of which Layar and Wikitude are well known. Others like SomaView and GeoVector also exist. AFAIK, Wikitude and Layar have made their API’s public. Toolkit: There is also a toolkit named, … Read more

Computing camera pose with homography matrix based on 4 coplanar points

If you have your Homography, you can calculate the camera pose with something like this: void cameraPoseFromHomography(const Mat& H, Mat& pose) { pose = Mat::eye(3, 4, CV_32FC1); // 3×4 matrix, the camera pose float norm1 = (float)norm(H.col(0)); float norm2 = (float)norm(H.col(1)); float tnorm = (norm1 + norm2) / 2.0f; // Normalization value Mat p1 = … Read more