Werkman BLACK Validation
WERKMAN BLACK
VALIDATION
MOTION TRACKING TECHNOLOGY
Werkman BLACK takes your skills to the next level!
Werkman BLACK’s data is 100% reliable. The official scientific report will follow shortly.
DATA ACQUISITION
- 1 sound, non-lame horse was guided at a measuring track on firm
(concrete covered with specific paper) and penetrable (arena
bedding), plane surfaces - The horses was guided 15 x in walk and 15 x in trot on firm surface –
the walk was considered good when the right front hoof touched the
ground in the examination window 2x to obtain one full stride - The horses was guided 15 x in walk and 15 x in trot on penetrable
surface – the walk was considered good when the right front hoof
touched the ground in the examination window 2x to obtain one full
stride
![werkman-black-validation-01](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-01.jpg)
Set-up
![werkman-black-validation-set-up-01](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-01.jpg)
![werkman-black-validation-set-up-02](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-02.jpg)
DATA ACQUISITION
Each walk was recorded by 3 cameras
- 1 high-speed camera (1000 fps) for lateral perspective.
- 1 high- speed camera for frontal perspective.
- 1 camera to record overall set-up.
High-Speed Video Kinematography
![werkman-black-validation-set-up-03](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-03-1.jpg)
Assessment of Stride Length
![werkman-black-validation-set-up-04](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-04.jpg)
Marker attachment for optoelectronic motion analysis
![werkman-black-validation-set-up-05](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-05.jpg)
![werkman-black-validation-set-up-06](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-06.jpg)
Data preparation
- High-speed videos were prepared by optimizing brightness and contrast to ease marker visibility a the hooves.
- By watching the videos from the overall-camera the stride of interest has been selected from the BLACK data.
- The stride of interested was recorded from the lateral high-speed camera and subsequentlyanalyzed with Tracker®.
Optoelectronic motion analysis with Tracker®
![werkman-black-validation-set-up-07](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-07.jpg)
Tracker®
- Tracker is the established standard method for motion analysis used to validate the Werkman BLACK sensor.
- Computer program used for video analysis.
- Reference points on a horse‘s leg are marked and a video with the horse in motion is recorded.
- In subsequent analysis, Tracker® allowes automatic tracking of reference markers to calculate timing charactersitics of the object in motion.
Data Analysis
Definition of a frame (= sequence of analysis)
![werkman-black-validation-set-up-10](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-10.jpg)
Tracker Analysis
Determination of a scale for calibration – (0,210 m)
![werkman-black-validation-set-up-09](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-09.jpg)
Determination of the coordinate system
![werkman-black-validation-set-up-08](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-08.jpg)
- Use of the „Autotrack“ function for optoelectronic motion tracling of the referece marker
- Definition of the evaluation rate and automark
![werkman-black-validation-set-up-11](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-11.jpg)
- Definition of start point of the video and the field of search
Output: Time Diagramm (ms) showing motion of the reference marker in three dimensions
![werkman-black-validation-set-up-12](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-12.jpg)
Comparison between both systems of
- Landing duration
- Mid stance duration
- Breakover duration
- Stance duration
- Swing duration
- Sride length
Werkman BLACK’s data is 100% reliable. The official scientific report will follow shortly.
![werkman-black-validation-set-up-13](https://werkmanhoofcare.com/wp-content/uploads/2020/03/werkman-black-validation-set-up-13.jpg)