Comparison of VHS video recording system with apple Macintosh-based image analysis and modified CODA-3 systems in equine motion analysis.

The research article discusses a comparative motion analysis study of horses, using two different systems: a VHS video-computer-based image analysis and the CODA-3 system. The study identified these systems as capable of producing comparable results with the exception of specific joint movements.

Experimental Setup

• The researchers used a video recording system combined with computer-based image analysis, with a low sampling rate motion analysis system. This setup was used to capture and analyze the movement patterns of a horse running on a high-speed treadmill.
• The horse was observed at different velocities – 1.6, 4, and 7 m/s, representative of a walk, trot, and canter respectively.
• The left forelimb and hindlimb of the horse were recorded from a lateral view, separately.
• Meanwhile, the CODA-3 system was used parallelly to take recordings for comparison, from the same position.
• Both systems were synchronized using a timer device, with an error level of +/- 1/300 seconds.

Measurements and Findings

• The researchers expressed and compared the joint angles recorded by the two systems in angle-time diagrams.
• They found that results from both systems were comparable in all joints measured, with the exception of the fetlock, a joint located at the horse’s foot.
• Discrepancies or inaccuracies in the fetlock recordings were suspected to be eliminated by adjusting and controlling the illumination during the recording process.

Conclusions and Further Implications

• The article concludes that the setup using the VHS video recording system and computer-based image analysis combination, likely running on an Apple Macintosh, seems promising as a simpler system for gauging and analyzing gait in horses.
• The findings suggest potential for the system to provide equivalent results to the more complex CODA-3 system, save for specific measurements such as the fetlock joint.
• These results may hold significant implications for applications in veterinary sciences, equine sports, and other areas where detailed equine motion study is required, provided the system is properly calibrated and used under appropriate illumination.