A series teaching the principles of Visual3D so you can better understand how to achieve your goals.
For more information or to request a topic visit the Visual3D Principles main page.
One of the most common ways to process your data in biomechanics is to use a Butterworth filter. Before you apply one using the pipeline command, you should know what the filter is actually doing to your data. In this tutorial, we talk about the theory of how Butterworth designed this filter and the effect it has on the frequency response in the passband.
Filters on your data as applied in a number of different ways. One common method is to use a specific section of data for each frame, this is called a filter window. In this tutorial, we explain what a filter window is and advantages and disadvantages of the size you set it to.
Within Visual3D there are many ways to perform mathematical operations. In this tutorial, we give you an introduction to the options you have to perform signal math. Whether you are using constants, adding or multiplying signals, using derivatives, or performing more complex calculations through evaluate expressions, the tools are most likely available to you in Visual3D.
As biomechanics is used to study human motion, kinematics are a fundamental building block. In this tutorial, we talk about velocity and acceleration and how to obtain them from position using derivatives. You can also watch our tutorial on how to perform these operations directly from the pipeline.
Signal magnitude is often a necessary calculation, but it is not always clear what the operation is doing. In this tutorial, we explain the math behind the signal magnitude calculation. You can also watch our tutorial on how to perform this operation directly from the pipeline.
Reviewing your data in Visual3D is an excellent way to troubleshoot or gain a better understanding. If you are looking over already processed data, you may be interested in knowing what calculations have been performed. Visual3D keeps a record of the calculations that were done, but you can also label your data for an easy way to keep track. In this tutorial, we show you an option we naming your processed signals to track the math history.
Understanding the sequence of how human locomotion occurs is an important part of biomechanics. In this tutorial, we discuss various gait events that define the phases of normal walking.
Categorizing sections of your data is a key to be able to analyze it, and be able to compare one trial to another, even across subjects. In this tutorial, we discuss what events are, why use them, and how to view them in Visual3D.
When processing non-standard biomechanical motions, it is necessary to establish reference points in your data. Using max and min events you can identify peaks and valleys in your signals.
A common function within many commands in Visual3D is the threshold. In this tutorial, we explore what a threshold is. An example you might find, is to define events using a threshold.
