AnyNet AnyNet-12824, Руководство по эксплуатации системы

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5-2. How to install the camera for the Face Recognition system?
This section will introduce the rule of camera installation and get the optimal image for the Face
Recognition system. Please take notes as below when installing the face recognition camera.
Minimum face resolution and maximum face angle
The minimum face resolution and maximum face angle for a face recognition task is at least 80x80
pixels and vertical /horizontal angle are 30°. A general rule of face recognition is that the smallest
unit that defines the recognized face has to be 80x80 pixels. In terms of face recognition, the smallest
unit is the width and height of face that compromises the image on the face recognition. In order to
get this face character, the minimum height of the characters has to be 80x80 pixels.
The characters can, of course, be taller (and will be if higher resolution cameras are used), the 80x80
pixel width and height is just the minimum value. But do note that if the characteristic width and
height are less than 80x80 pixels, then the recognition rate will drop drastically.
Vertical resolution >60 pixels
Horizontal resolution >60 pixels
Horizontal range < ±30°
Vertical range <±30°