👏Dual Camera Calibration

How to calibrate your dual camera setup before recording

Please note that this calibration guide is only for users using the dual camera set up for Rokoko Vision


This guide will instruct you on how to print out the sheets needed for doing the calibration and how to do the two-step calibration process.

When utilizing a dual camera setup for mocap animation, it is essential to ensure proper calibration and accurate tracking. One crucial aspect of this process is the use of a Checkerboard pattern and a Calibration marker.

It is essential to print those on a A4 or US letter-sized paper. These standard paper sizes ensure consistent dimensions and scales for accurate calibration.

When printing calibration materials for motion capture, ensure that you print them in their actual size. Avoid using any print options such as "fit to page" or scaling, as they can distort the measurements and affect the accuracy of the calibration process.

Printing the materials in their true size will help maintain the integrity of the calibration and ensure accurate results.

Mounting on a Hard and Flat Surface

To achieve optimal calibration results, it is important to mount the printed Checkerboard pattern and Calibration Marker on a hard and flat surface. This surface should be stable and free from any folds, creases, or warping that may distort the pattern.

Mounting the calibration tools on a rigid surface ensures consistent positioning and minimizes any potential sources of error during the calibration process.

Camera calibration with the Checkerboard

Performing intrinsic calibration with a Checkerboard pattern is a crucial step in achieving accurate and reliable tracking and measurement with your cameras. By placing the checkerboard step-by-step in each of the 9 camera sections, you can ensure that each camera in your setup is properly calibrated.

Remember to repeat the process for each camera, following the same steps. Proper calibration will improve the accuracy and performance of your camera system, leading to more precise and reliable results in your animations

The Checkerboard pattern is a key component in the calibration process. It provides a reference point for the cameras to understand the spatial relationship between different points in the scene.

Stereo calibration with the Calibration marker

Place the Calibration marker on the floor in such a way that it's aligned with patterns on the floor or walls and make sure that it is visible for both cameras. Allow it to rest undisturbed until the calibration has successfully completed.

Calibration Marker contains a unique pattern that aids in determining the camera's position and orientation in space.

Ideal grid representation

To get correct calibration result the grid generated after calibration need to match perspective of the room by following the same path as the walls.

  • The direction of the arrow determines forward direction of the animation's 3D space.

  • The Calibration marker should be positioned perfectly in the middle of the grid.

Nonideal grid representation

You will need to reposition the calibration marker and try again if the generated grid does not match perspective of the room by following the same path as the walls.

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