Camera	Pitch angle of the camera optical axis relative to the horizontal plane: at least 15 degrees (for the inclined method of placement); from 80 to 100 degrees (for placement on ceiling). Resolution is from 640x360 to 1920×1080 pixels. Resolution can be: lower for close-up scenes (2–7 meters for cameras with standard focal length) without loss of recognition quality;  higher for scenes far from camera (from 10 meters). FPS is at least 25 Color image only
Lighting	Lighting in the scene is from 100 to 1000 lux
Scene and camera angle	Shooting distance is from 5 to 30 meters Density of people flow is no more than one person per square meter Volume of the abandoned object is from 3 cubic decimeters Background texture: moving, random and inhomogeneous background with contrast variations from 0.2 to 0.8
Object images	For abandoned objects, the optimum density is 100 pixels per meter Maximum signal-to-noise ratio (without the function of automatic signal amplification) is at least 42 dB Image isn't noisy and isn't distorted by artifacts of the compression algorithm Distortion is no more than 10% (at the edges of the frame—at a distance of one third from its center in width, height and diagonal)