(Fall 2012) Microsoft Kinect - Skeletal Repeatability
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The study evaluates the repeatability of the Microsoft® Kinect™ in measuring skeletal movements during walking. Through multiple tests and graphing of coordinates, the results indicate that the Kinect™ provides consistent measurements across various skeletal points, making it a viable tool for applications such as athletics and research. Future work includes using the Kinect™ for analyzing squatting posture to enhance safety and effectiveness during workouts.
(Fall 2012) Microsoft Kinect - Skeletal Repeatability
- 1. MICROSOFT® KINECT™ – SKELETAL REPEATABLITY The purpose of this study is understand the movements of the person while walking, determine the repeatability of the Microsoft® Kinect™ and use coordinates of specific points to see if the angle can be measured with the Microsoft® Kinect™. The repeatability in this study is the ability to duplicate skeletal point measurements. Derek Jackson, Carl Zaderej, Kevin O’Connor, Stephen Elliott Overview •Skeletal Points to be used: •Head •Shoulder Center •Spine •Hip Center •Knee •Ankle K I N E C T 90 inches X: .77 -.78 Y: .19 Z: 2.76- 2.77 X: .66 -.67(neg) Y: .30 - .31 Z: 3.31 – 3.32 X: .81 Y: .31 - .32 Z: 3.41 - 3.43 X: .65 -.66(neg) Y: .23 Z: 2.79 ^ 21.875 inches 22.125 inches> <21.875 inches 22.3125 inches v Findings -- ground is not level -- box is not symmetric Lab door I R I S C A M Experiment Design Experiment The subject walked towards and away from the Microsoft® Kinect™ , and the skeletal points selected were each graphed to test the repeatability of the product for research. The X ,Y, and Z coordinates were measured multiple times, and then compared to see if any change was found. The would be useful in applications such as athletics and border control. Graph Analysis 0 0.5 1 1.5 2 2.5 3 3.5 Location Time Hip Center Test 1 X Coordinates Z Coordinates Y Coordinates 0 0.5 1 1.5 2 2.5 3 3.5 Location Time Hip Center Test 2 X Coordinates Z Coordinates Y Coordinates -1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 Location Time Knee Test 1 X Coordinate Z Coordinate Y Coordinate -1 -0.5 0 0.5 1 1.5 2 2.5 3 3.5 4 Lo0cation Time Knee Test 2 X Coordinate Z Coordinate Z Coordinate 0 0.5 1 1.5 2 2.5 3 3.5 4 Location Time Head Test 2 X Coordinates Z Coordinates Y Coordinates -0.5 0 0.5 1 1.5 2 2.5 3 3.5 Location Time Head Test 1 X Coordinates Z Coordinates Y Coordinates 0 0.5 1 1.5 2 2.5 3 3.5 Location Time Shoulder Center Test 1 X Coordinates Z Coordinates Y Coordinates 0 0.5 1 1.5 2 2.5 3 3.5 Location Time Shoulder Center Test 2 X Coordinates Z Coordinates Y Coordinates 0 0.5 1 1.5 2 2.5 3 3.5 Location Time Spine Test 1 X Coordinates Z Coordinates Y Coordinates 0 0.5 1 1.5 2 2.5 3 3.5 Location Time Spine Test 2 X Coordinates Z Coordinates Y Coordinates Results ConclusionAfter graphing and analyzing the data we determined that the Microsoft® Kinect™ has good repeatability. As a result, we conclude that the Microsoft® Kinect™ can be considered a useful tracking devices and a practical research tool. Future Work Squatting is a popular lower body lift for the population that exercises. Increase the understanding of the correct posture while performing the lift. Better results and lower the chance of injury. Using the Microsoft® Kinect™ (or similar technology) to facilitate accuracy of squatting position. The measurements were recorded from the subject while the subject was within the red box. The subject would walk into the box, have iris captured, and turn around and walk out of the designated area. This part of the experiment is with the head. As you can see from the graphs, the Microsoft® Kinect™ appears to have good repeatability since both graphs are near duplicates of each other. This part of the experiment is with the shoulder center. As you can see from the graphs, the Microsoft® Kinect™ appears to have good repeatability since both graphs are near duplicates of each other. This part of the experiment is with the spine. As you can see from the graphs, the Microsoft® Kinect™ appears to have good repeatability since both graphs are near duplicates of each other. This part of the experiment is with the hip center. As you can see from the graphs, the Microsoft® Kinect™ appears to have good repeatability since both graphs are near duplicates of each other. This part of the experiment is with the knee. As you can see from the graphs, the Microsoft® Kinect™ appears to have good repeatability since both graphs are near duplicates of each other. Points of Interest