Model Performance

Requirements

The hand movements, facial expressions, and postures of the model determine the postures and actions of the virtual avatar. Therefore, models should act and speak as naturally as possible during video shooting.

Record the video as instructed and evaluate the recording process based on the actual requirements.

• Interaction not required: 15–30 seconds of silence + 4–5 minutes of speech
• Interaction required: 15 seconds of silence + non-semantic action + 4–5 minutes of speech
• Action arrangement and interaction required: 15 seconds of silence + non-semantic action + semantic action + 4–5 minutes of speech

Details:

• Silent period: Record the person in silence for about 15–20 seconds.

  The model looks at the camera, smiles with his or her mouth closed, and remains silent, with hands put at the initial position.

• Action recording period: The atomic action for intelligent interaction is recorded for about 40s. (Skip this step if intelligent interaction is not required.)

  Speak and act as guided, move naturally, slightly relax during the interval of actions, and blink naturally.

• Natural expression period: The lip movement, action, posture, and facial expression of the model speaking naturally are recorded for about four and half minutes.
  • The model reads the script paragraph by paragraph at a natural speaking speed and acts slightly. The head can move naturally.
  • The model's mouth should be fully closed and hands should be put back to the initial position during pauses. (Practice is recommended before shooting.)

Precautions

• If a speech error occurs, skip it or continue the speech without interrupting the shooting.
• Rotate or move the head within 15 degrees.
• Avoid actions with clear meanings, such as thumbs-up signs and number.
• Avoid actions that may block the face, such as resting the cheek on hands and scratching the head.
• Move within the frame and do not block the face (such as hands above the chin).
• Keep eye contact with the lens.
• Avoid wrong pronunciation. Do not speak too fast, too slow, or abruptly.

Requirements for Walking Virtual Avatar Video Shooting

If you need to record the image of a walking virtual avatar, the model should:

1. Face the camera and look at the lens when walking.
2. Walk in one direction for up to three steps.

Requirements for Real-Scene Virtual Avatar Video Shooting

If you want to create a real-scene virtual avatar image, ensure that the background is static and does not change regularly or significantly.

Real-scene virtual avatar videos do not need to be cropped. Therefore, green or transparent clothes is allowed.