An Android app to stabilize text or other screen content in case of shaking. Three implementations to choose from:
- Naive physics implementation--it uses the linear accelerometer data to integrate displacement of the phone and adjusts the text in the opposite direction, with adjustable friction factors.
- Lin Zhong's NoShake paper, which models a spring-dampener system on the screen on the x and y axes.
- Another system model using the recurrent least-squares estimation algorithm, based on paper by Wei, Hsiao, Jiang.
You can switch between the versions by changing the mImplType variable at the top of MainActivity. Adjustable constants for each implementation are in *Constants.java. The two system model implementations use a circular buffer C++ API and some other C++ APIs via the Android NDK. Rendering is done using OpenGL ES code.
Compare to this test version in C, which interacts directly with the Direct Rendering Manager to draw on the screen.