# Hands Motion Capture (Beta) In MOVIN Studio, the hands motion capture feature has been newly added in beta. With this feature, you can track wrist and finger movements in real time using only the MOVIN TRACIN device. ## Hands Motion Capture {% stepper %} {% step %} ### Please select MOVIN from the Hands options in MOVIN Studio

{% endstep %} {% step %} ### Calibrate Actor During the Actor Calibration stage, when the actor stands in front of the camera, Hand Tracking Initialization will automatically begin. {% endstep %} {% step %} ### Check the Hands Motion Data

When the actor calibration is completed, the Hand Tracking Initialization will also finish. It allows the system to track the actor's hands motion in real time. {% endstep %} {% step %} ### (MOVIN Studio v2.1.0 or later) If Hand Tracking is not working, please check the camera view. * In MOVIN Studio v2.1.0 or later, when hands are detected, their positions are displayed as blue and red bounding boxes in the camera view. * If hand motion capture is enabled but not functioning, first check whether the blue and red boxes appear in the camera view. * If the blue and red boxes are not visible, the device may not be detecting your hands due to lighting conditions. Please refer to [#important-notes](#important-notes "mention") and adjust the lighting environment accordingly. {% endstep %} {% endstepper %} ## Important Notes * Hands Motion Capture works only when the hands are positioned within 1\~4 meters of the device and are visible within the camera's field of view (FoV). * If the actor is outside the camera’s FoV, the MOVINMan will appear dimmed. * For best accuracy, we recommend using the tracking feature within 1.5–3.5 meters from the device. * Optimal performance is achieved when a single actor is within the camera’s FoV. * Tracking accuracy may decreases in low light environments or when wearing dark-colored clothing. * Please use a bright background and wear clothing that contrasts with your hands for better detection. * For best results, make sure your hands and wrists remain clearly visible and that you stand directly facing the camera. * If the camera shakes or vibrates, hands motion capture may become unstable.

## Hands Motion Capture Shooting Environment Hands Motion Capture uses a camera-based approach rather than LiDAR, so proper lighting and FOV (Field of View) conditions are required. The entire body, including the hands, must remain within the camera’s field of view. Please refer to the sample photos below and set up your environment accordingly. ### Lighting Human eyes adapt quickly to brightness, so a scene may feel “bright enough” to you while the camera still struggles to clearly recognize the contour of the hands. Tracking accuracy may degrade in the following environments: * When the overall ambient light is too low and the hand contour becomes blurry * When strong backlight, floor reflections, or polarized lighting cause the hands to be overly bright * When there is significant brightness contrast between the upper and lower parts If tracking appears unstable, adjust the lighting or use curtains so that the hand contours remain clearly visible to the camera.
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{% endcolumn %} {% endcolumns %} #### Ideal case

Hands and full body are clearly recognized

#### Lighting Conditions That Require Adjustment

Hands and full body appear too dark due to backlighting

Scenes where intense light causes reflections or glare

{% hint style="info" %} Tip: If your setup is backlit, it’s best to use blackout curtains. Regular curtains don’t fully block light, so light can leak through small gaps and reduce the accuracy of Hands Motion Capture. {% endhint %}

Backlighting may still remain, even with curtains

### Camera Field of View(FoV) & Occlusion #### Proper Use {% columns %} {% column %}

The full body and hands are within the FoV

{% endcolumn %} {% column %} Hands Motion Capture operates based on the camera’s Field of View (FoV) inside the MOVIN TRACIN device, which is installed approximately 85 cm above the ground.\ Because of differences in each actor’s height, arm length, and hand position, the optimal distance may vary naturally. As shown in the left image, accurate tracking requires checking the Camera View in MOVIN Studio to ensure that the entire body, including the hands, remains within the camera’s FoV.\ Additionally, the hands must not be occluded by the body. When the actor moves outside the FoV, the following behaviors may occur: * Arms or hands are not visible in the Camera View * Body parts located outside the FoV appear gray Before using Hands Motion Capture, always verify that: * The full body and hands are within the FoV * The hands are not obscured by other body parts {% endcolumn %} {% endcolumns %} #### Cases Where Hands Leave the FoV or Become Occluded {% columns %} {% column %}

The left hand is positioned outside the FoV

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The right hand is positioned outside the FoV

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Hands move out of the camera’s FoV when both arms are raised

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The hand becomes hidden when it is positioned behind the torso

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One hand becomes occluded when the other hand blocks it.

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Both arms are moved behind the body, causing the hands to become hidden.

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