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Using VisageFeaturesDetector, any number of faces can be detected in an image.
How far from the camera can the face be tracked/detected?
The tracking distance depends on the camera resolution. For the face to be detected and tracked, it should be at least 30 pixels wide in the image. For example, for a webcam with resolution 1920×1080 (Logitech C920), tracker can be configured to detect and track faces up to ~7.25 meters from the camera (with performance tradeoff).
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Face tracking does not work as I expected
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