Introduction

In the world of sports analysis and motion capture, clarity and precision in visual data are paramount. Swing Catalyst's latest feature, the Automatic Lens Distortion Correction, is a testament to this pursuit of perfection. This feature significantly enhances the accuracy of captured images by correcting lens distortions, a common issue in camera systems. By ensuring true-to-life representation of movements, this tool becomes invaluable for coaches and athletes aiming for detailed, accurate motion analysis. This article aims to provide a comprehensive guide on how to effectively utilize the Automatic Lens Distortion Correction feature, making it an accessible and powerful tool in your analytical arsenal.

Preparing the Aruco Board

First, prepare your Aruco board using one of the following options:

• Professionally Printed Board: Available soon in the Swing Catalyst shop.
• Home-Printed Board: Print and mount the Aruco board on a stiff surface like cardboard, ensuring it's completely flat.
• Using a Tablet: Load the Aruco board PDF on a tablet, ideally the size of a standard iPad or larger.

The aruco board is available as a PDF file.

Step-by-Step Calibration Guide

Step 1: Prepare the Aruco Board

Select and prepare your Aruco board following one of the methods above.

Step 2: Accessing the Feature

• Open Swing Catalyst
• Settings: Enter the settings menu either through the start menu or the analysis mode main menu button
• Camera settings: Open advanced settings for the camera you wish to calibrate
• Calibration Tab: In the Advanced dialog, click on the 'Calibration' tab.

Step 3: Starting Calibration

Initiate Calibration: Press the "Start Calibration" button.

Step 4: Performing the Calibration

Observe Feedback Metrics: As you move the Aruco board, monitor the 'Coverage' percentage and 'Calibration Error' figures.
Move the Board: Gently move and tilt the board across different parts of the camera’s field of view.
Target Metrics: Aim for at least 80% coverage and a calibration error below 1 for optimal calibration quality.
Continue Until Optimal: Keep adjusting the board’s position until the desired metrics are achieved.

Step 5: Completing the Calibration

Stop Calibration: Once the coverage and calibration error are within the target range, click "Stop Calibration."
Software Processes Correction: The software will then calculate and apply the necessary corrections.
Verify Calibration: Check the live image feed to confirm the quality of the calibration.

Tips for Effective Calibration

Smooth, Slow Movements: To avoid blurring and ensure accuracy.
Comprehensive Coverage: Move the board throughout the entire field of view.
Varied Angles and Distances: Tilt and rotate the board to expose the camera to different perspectives.
Adequate Lighting: Perform calibration in a well-lit environment to prevent shadows or reflections.

Conclusion

Swing Catalyst's Automatic Lens Distortion Correction feature, with its real-time feedback system, is a significant advancement in sports motion analysis. By precisely following these steps and aiming for the optimal coverage and calibration error metrics, users can effectively calibrate their cameras. This process results in more accurate, distortion-free videos, enhancing the quality of motion analysis and aiding in the improvement of athletic performance.