The mentioned camera parameters (1920 x 1080, 30 fps, mono) should be appropriate for our software and most of the use cases.
This text requires review after the introduction of new face detector in V8.7b2. Also, https://visagetechnologies.com/facetrack-features/ needs to be reviewed.
In general, visage|SDK works with a very wide range of camera resolutions and can provide sustainable tracking on faces as small as 30×30 pixels. With these camera parameters visage|SDK can provide sustainable tracking up to 5 meters.
For further details on inputs and other features specifically for face tracking, please see https://visagetechnologies.com/facetrack-features.
How far from the camera can the face be tracked/detected?
This text requires review after the introduction of new face detector in V8.7b2.
We define a face as a square encompassing all the facial features also known as the facial bounding box. The tracking distance depends on the camera resolution. For the face to be detected and tracked, it should the facial bounding box size must be at least 30 pixels wide in the image5% of the larger image resolution. For example, for a webcam with resolution 1920×1080 (Logitech C920), the tracker can be configured to detect and track minimal facial bounding box is 96×96 pixels ( 1920 x 0,05 ) which corresponds to faces up to ~7.25 ~5 meters from the camera (with performance trade-off)this specific camera.