Data processing

Linear Envelope

Working with EMG data, you will most likely encounter the need to use a Linear Envelope. In this tutorial, we explain what this type of data processing is doing to your signals.

Smoothing data can be necessary as part of your processing workflow. This tutorial discusses some options for smoothing your motion capture data before you export it to C3D format. Moving average and Butterworth filters are both valid options that could be employed, and we go over the differences between them.

Pipeline: Linear Envelope

Motion capture data is often used alongside synchronized electromyography (EMG) data, so you will most likely find a need to process muscle activations. In this tutorial, we show you how to create a pipeline to perform linear envelope smoothing of your data. We show you the steps to implementing high-pass, rectify, and low-pass commands on EMG signals.

Pipeline Commands: High-Pass & Low-Pass Filters

As you automate your data processing in the pipeline, you will likely need to implement high-pass and low-pass filters. As you determine the best ways to use these filters, customizing the pipeline commands will give you full control over your data processing.

High-Pass & Low-Pass Filters

Processing your data is an essential part of obtaining valuable information from your motion capture measurements. Two of the key ways to clean up your data are to use high-pass and/or low-pass filters. In this tutorial, we talk about what these filters actually do. As we touch on high and low-frequency components of a signal, we explain how to remove them using filters.

Pipeline commands: Interpolate

Although we often process our data for gaps before it gets to Visual3D, it happens that we need to interpolate our data from the pipeline. In this video, we walk through the steps and options to fill gaps in your trajectory data.

Interpolation

Gaps in motion capture data can happen. Occlusions can be fixed as long as we understand what we are doing. In this tutorial, we talk about what a gap in data is, and ideal ways of fixing them, particularly using the principle of interpolation.

Command Editor

Each command in a Pipeline can be customized to perform the specific task you need it to. In this tutorial, we give an overview of how to make changes to how a command behaves by using the command editor.

Pipeline Commands: Divide by Constant

This tutorial shows you how to divide a signal by a constant in the pipeline. Although there are many possible applications for this command, we will use a simple example of converting weight to mass by dividing by the acceleration of gravity.

Pipeline Workshop

In this tutorial, we focus on the various parts of the Pipeline Workshop so that you can learn the principles of how it works. From finding the right commands to arranging them in the desired order, we show you how to use this interface within Visual3D to automate your data processing.