# Tagged Questions

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18 views

### Accelerometer - coordinate system transformation

I'm getting some accelerometer readings from an Android phone, but it comes in on the phone's coordinate system. I want to apply a transformation to put the acceleration in the world coordinate system ...
8 views

### How to Evaluate Eigen Background Subtraction without groundtruth

I have performed background subtraction to detect motion in video sequences. I have performed experiments with different values of no of frame sequences to be analysed and top eigen values to be used. ...
50 views

### Capturing images on fast moving conveyor belt

This may or may not be an image processing problem. I am developing a simple system that captures images of a part as they are being manufactured and sent out along the conveyor belt. I've solved ...
70 views

### Diamond search block-matching algorithm

I want to compare a few adjacent frames in a video and find redundant objects in those frames. After a few searches I've found that the Diamond Search Algorithm is a good choice. I'm new to this ...
22 views

### Motion vectors and motion estimation

I want to compare 2 or more frames in video and need to extract redundant objects from that frames.I'm going to use block matching algorithm for this.But I'm not clear about what are motion ...
84 views

### How to form Kalman filtering matrices for a problem with variable acceleration?

Assuming we have time vector $T$ with constant time step $dt$ position vector $X$ velocity vector $V$ acceleration vector $A$ All vectors $X, V, A$ have noise on their measurement ( $n_x$ , $n_v$ ...
232 views

### Analyzing accelerometer data: appropriate use of rotation matrices?

I'm working on a project in which a rod is attached at one end to a rotating shaft. So, as the shaft rotates from 0 to ~100 degrees back-and-forth (in the xy plane), so does the rod. I mounted a ...
39 views

### Decimation of motion

I have a motion signal that you can think of as a sequence of pairs (x,y); what would be the best approach to decimate this sequence at real time? I haven't found anything similar on the web and I'm ...
288 views

### Correlating accelerometer data

I am getting a signal from a device. This signal contains a non-random noise signal in it. I want to remove that noise from the signal. This noise is correlated to the motion the device is having. So ...
197 views

### Estimating device height from 3-axis accelerometer data (possibly by supervised learning)

I'm trying to estimate the height of my device using an cheap integrated Freescale accelerometer. First, I estimate the earth direction when measured acceleration is close to 1g, then I project the ...
26 views

### How can I improve my motion capture system?

Please excuse me if this is not the proper place to ask this. I just need some general advice. I have set up a very basic homemade motion capture system where I put three TrackIR cameras from ...
248 views

### 'Best fit' motion curve for an unachievable profile

I have a discrete function that represents a 1d position in space over time. I have a motion system that would like to achieve this curve, but, due to constraints on jerk (3rd derivative) and ...
64 views

### How to get translation and roation data using 6DOF MPU6150

I am trying to get the position data from an IMU 6 Degrees of Freedom (MPU-6150) board using an Arduino Uno. I am trying Jeff Rowberg’s example MPU6050_DMP6.ino that may be found here. This is the ...
517 views

### Deconvolution: Richardson-Lucy vs Wiener

I am studying some deconvolution techinques (to remove motion blur) like: Richardson-Lucy Wiener Are there any pros/cons of using one versus another? For example which are the pros/cons of ...