Learning Kinovea
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School
Brigham Young University, Idaho *
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Course
415
Subject
Health Science
Date
Feb 20, 2024
Type
docx
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5
Uploaded by MOls20003
HRHP 415 Biomechanics assignment: Learning Kinovea (Intro to Kinovea) (10 points)
The purpose of this assignment is to help you become more familiar with Kinovea. We will be using this software repeatedly throughout the semester, and many of you will find it helpful to use this software for your research projects. For this assignment, complete the required parts, and copy and paste your results/images into this document. Please submit your assignment as a word document.
●
Part 1
: Downloading the Software:
○
See here for Windows:
Go to this link: https://www.kinovea.org/
and download the software by clicking this button: ○
See here for Mac
: Go to this link: https://vdi.byui.edu
Access Kinovea by clicking on this option: Enter your BYU-I username and password (the same you would use for Canvas).
Click on “BYUI Software”
Once you see Window’s desktop, search for “Kinovea” from the “start” menu.
●
Part 2
: Opening files into Kinovea:
○
See here for Windows:
In canvas…find video, and download the video to your computer. Upload videos into Kinovea by clicking File>Open Video File>Select Video ○
See here fore Mac
: Open Canvas on the remotely controlled
desktop (
not your Mac desktop
).Find video, and download the video to the proxy desktop. Upload videos into Kinovea by clicking File>Open Video File>Select Video.
Now that you are able to upload videos into Kineovea, we can begin to analyze the video with a variety of tools. In order to do this, ensure that you download each of the videos posted in Canvas. If at anytime you feel you need additional help, you can access the extra resources available in Canvas (Kinovea for dummies, etc.). I would suggest getting familiar with the toolbar (as shown below). This will include the majority of the tools you will need for this assignment and for future data analysis through this semester. ●
Part 3
: Using the video titled: “Walking on a Treadmill” complete the following activities: A.
Crop the video:
Crop the video to one gait cycle. Make sure this is the first gait cycle for the right leg that appears in the video. This is done by clicking the highlighted working zone buttons below. The speed (also highlighted) will help you make it more accurate as you slow it down. B.
Calibrate & Set Frame Rate: Calibrating the video will help Kinovea convert your media pixels to real world units. For this project, we used a camera shooting
at 120 frames per second. Click on the video tab on the top menu. Next select ‘Configure video timing.’ You will see something like the image below pop up.
This is where you type in your appropriate frames per second (120 in both places) and hit ‘
Apply’
. C.
Find the maximum knee flexion: Slow your video down to find the point of maximum knee flexion during the swing phase (between the hamstring and the calf muscles; inside angle, when the foot is not in contact with the treadmill). Using the angle tool, place the middle dot on the knee marker, the top dot (associated with the dotted line) on the thigh marker and lower dot (associated with the solid line) on the lateral malleolus marker. Post the screenshot of the maximum knee flexion angle found below
. (2 points)
D.
Calibrate Distance: The distance of the treadmill belt is 1.2 meters. Using the line tool, draw a line along the length of the belt (just the belt, not the treadmill). Right click and choose “Calibrate…..” Apply your real measurement with the correct units (1.2 m). Post your screenshot
with the correct distance below. (2 points)
E.
Tracking Paths: (Make sure your calibrated distance and frame rate is still set based on the steps above). Select the Move tool (looks like a right hand). At the start of the gait cycle, right click on the subject’s knee marker. Many options will pop up. Select “Track path.” Two rectangles will show up on the screen. Move the rectangles so that the cross marker (in the middle of the small rectangle) is aligned on the middle of the knee marker. Move the video frame by frame using the ‘advance forward 1 frame’ button (just right of the play button) to track the knee marker through one gait cycle (heel strike to heel strike). Make sure the tracked path (cross marker) does not move off the knee marker as you move frame by frame through the gait cycle. If it does, correct the position of the tracked cross marker for that frame. Once the entire path is tracked, right-click on
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the path and select ‘End path edition.’ This stops the tracking of the marker. Next, right click on the path and select ‘Display Measure’ and then select ‘speed.’
Move back through the gait cycle that just tracked the knee marker. You will notice the speed changes at different frames. What is the maximum speed during
this path? Post your screenshot showing the tracked path and maximum speed here
. (1 point).
Now, staying at the point of maximum speed in the gait cycle, change the caputre
framerate and video framerate (see part B) to 60 frames per second. Then click, ‘Apply.’ How did this change your maximum speed of the tracked marker? Post your screenshot showing the tracked path and new maximum speed here
. (1 point). Note: This step is to show you the importance of matching the frames per second used in data capture to the video analysis. F.
Stopwatch: (Make sure your calibrated frame rate is to 120 fps as done in Step B). Attach a stopwatch to the beginning of your gait cycle on the left side of the screen. You may need to hold down the right click when selecting the stopwatch to then select ‘Stopwatch’. Right click on the timer placed on the left side of the screen and select ‘Start the stopwatch.’ Move the video through one gait cycle. Next, click on the timer and select ‘Stop thee stopwatch.’ How long does it take to get through one gait cycle? Attach a screenshot of your clock time here. (1 point)
G.
Finding Coordinates: (Make sure your calibrated distance and frame rate is still set based on steps B and D above). Place a coordinate system on the screen by selecting “Tools” on the top of the screen and then select “Coordinate System.” Move the origin (0,0) to the middle of the yellow square on the back right side of the treadmill (bottom left corner of the screen). Now, move the video to when the right toe leaves the treadmill. Using the ‘cross marker’ function, place a marker directly on the red thigh marker and another marker directly on the red ankle marker. Right click on the placed markers and select ‘display measure’ and then select ‘Position.’ Display the position for both thigh and ankle markers. What are the coordinates of the marker on the thigh and ankle? Include a screenshot below
. Now, move the origin of your coordinate system to the red marker at the subject’s
knee. You may need to select the move tool (hand function) to move the coordinate system. How did this change the placed markers coordinates at the thigh and ankle? Screenshot the new coordinates at the subject’s thigh and ankle
marker. (1 point; ½ point per screenshot)
Part 4
: Upload your own video.
A.
Use the camera on your phone or another accessible camera to capture a video of you walking, taking a few strides. Collect the video from the side, so sagittal plane movement is easily viewed, as if you were going to analyze the right leg. You may need the assistance of someone else to collect the video, but I want you to be in the video.
B.
Upload this video into Kinovea (See part 2 for directions). Note: If you are using a
Mac computer, remember you are accessing Kinovea through the VDI. You will need to access your video through email or Google drive or something AFTER you open Kinovea. The orientation of your video needs to be in landscape orientation (mostly horizontal, like in the video you have been analyzing). If the video is mostly vertical with lots of black space on both sides of the video, you need to change the orientation of your
phone while filming. If you find that your video is not oriented correctly once uploaded in Kinovea, change the orientation of your phone and film again. You may want to remember this orientation for future videos this semester. Hence, the reason I am having
you learn this. For me, it works the best when I hold my phone upright and rotate it 90 deg to the right. You will not get credit for this part unless the video is oriented correctly (landscape orientation with little black on each side while your feet are at the bottom of the image).
C.
Move to the frame when the right foot first contacts the ground. Screenshot this position and place the picture below (2 points). You MUST include the entire screen so it is clear the image has been uploaded in Kinovea.