> ## Documentation Index
> Fetch the complete documentation index at: https://docs.moverse.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Calibration Board

> Physical dimensions, fabrication, and operational usage.

The **Moverse Calibration Board** is a planar visual marker utilized during multi-camera volume calibration (Phase 1) and origin calibration (Phase 2).

> **[Download Calibration Pattern (.SVG)](https://mintlify.s3-us-west-1.amazonaws.com/moverse/images/equipment/accessories/calibration_side_A.svg)**
>
> ![Moverse Calibration Board](https://mintcdn.com/moverse/4yI2EZltK8uGylpB/images/equipment/accessories/calibration_side_A.svg?fit=max\&auto=format\&n=4yI2EZltK8uGylpB\&q=85\&s=9612d56093e2a425255032b96c5b7e91)
>
> Moverse Calibration Board.

***

## Physical Specifications

| Parameter | Specification | Notes |
| :- | :- | :- |
| **Dimensions** | $39\text{ cm} \times 54\text{ cm}$ ($15.3\text{ in} \times 21.3\text{ in}$) | 1:1 aspect ratio required during printing |
| **Pattern Topology** | High-contrast planar fiducial | Ensures identifiability and robust measurement collection |
| **Substrate Material** | Rigid foam board or aluminum composite | Must be non-flexible to prevent non-planar optical distortion |
| **Surface Finish** | Matte / Anti-glare | Specular highlights will impair measurement collection |

***

## Operational Workflows

The board is used in both calibration phases:

### 1. Extrinsic Volume Calibration (Phase 1)

Traverse the target through the physical volume, rotating the board smoothly across different elevations and orientations.

* **Detection Criteria:** Ensure the fiducial marker is visible to at least 2–3 overlapping camera viewports simultaneously to collect robust measurements.
* **Coverage:** Continue moving through the space until all per-camera progress bars reach 100%.

### 2. Ground Origin Calibration (Phase 2)

Lay the marker board completely flat on the capture floor at the desired coordinate system center.

* **Axis Definition:** The marker’s planar alignment dictates the world ground plane ($Y=0$) and sets the global origin ($0, 0, 0$).
* **Sampling:** Capture the sequential coordinate samples in Moverse Capture Studio as outlined in the [Calibration Guide](/sections/studio/calibration.md).

***

## Fabrication Guidelines

> [!WARNING]
>
> **Print Scaling Verification:** When outputting the SVG to a wide-format printer, disable any "Fit to Printable Area" or auto-scaling settings in your software.
> Scaling the file dynamically will result in metric coordinate calculation errors inside the tracking engine.

> [!NOTE]
>
> Always verify prints by measuring the black rectangle's dimensions which should be 30cm.


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