Motion Analysis 2D

Installation

Download latest release from here.

Importing Videos

Known supported video formats: mp4, avi, mkv

• File > Open Video File Ctrl+O

• Alternatively, drag and drop into “Files”. Videos can be navigated by clicking, or by using D for the next video, and E for previous.

Batch Processing: Enables running automatic motion analysis of consecutive video files.

Video Adjustment

Orientation:

When opening video files, orientation might differ.

• Rotates the video. It can be clicked multiple times.

• Mirrors the video. Likewise, it can be clicked multiple times for mirroring vertically and horizontally.

Lens Distortion:

Perspective Correction and Scale:

Preparation for Motion Analysis

Once a valid video file is opened, buttons for trackers, angles, and distances will be enabled.

Tracker:

• Enables tracking placement. The first click places the tracking point. Subsequent clicks delimit the tracking box. After placement, a pop up window will appear, allowing the user to name the tracker, choose tracking algorithm and colour. The R key on the keyboard resets the trackers.

^{Tracking algorithms: CSRT is set as default. Median Flow, KCF, Boosting, MOSSE, MIL are other available options. Please check other documentation on specificities of each tracker. Making the tracking point static is also an option.}

Angle:

• Prompts angle selection. Three tracking points are needed to enable an angle. This process is done in a succession of 4 clicks:

1. The first click will define which tracking point will be the vertex used to calculate the angle.
2. Defines the first line.
3. Should be placed in the coinciding* vertex.
4. Defines the second line.

^{*Vertexes do not necessarily need to coincide. Calculating angles between two disconnected lines is also possible.}

Distance:

• Adds a distance. Distances can be set between two tracking points.

Delete:

• After clicking this button, click on any tracking point you would like to delete.

Items:

• All trackers, angles, and distances are listed here. They can be disabled and enabled. Clicking with the right button over an item allows the user to edit or delete it.

Running Motion Analysis

Once trackers are placed, click the button to enable automatic motion tracking T using the defined algorithms.

• Will play the video G. If automatic motion tracking is enabled, the software will analyse every frame onwards.

• Is used to navigate the footage frame by frame (F for the next frame, S for previous). If automatic motion tracking is enabled, frames will be analysed.

• For adjustments in tracker placement and for reviewing already analysed video, please disable the automatic motion tracking.

Data Plots:

• This tab shows values for y and x throughout the analysed footage for trackers, angles, and distances.

Saving and Exporting Data

The software will create a temporary .json file within the folder where the analysed video is located. This file is used by the program as a log.

• Enabling Auto Save A maintains the temporary .json file, even after finishing processing a video. This file can be used to process data, and can be dragged and dropped into new videos to use the same, already set, tracking points.

• Will export V tracking point coordinates and calculated angles and distances as a .csv file.

Menu

Edit > Shortcuts Ctrl+Shift+S: Lists all keyboard shortcuts.

Edit > Visual Preferences Ctrl+Shift+P: Allows for editing default colours of items and width of visible lines.