Camera

• Resolution: 720x576 (CIF4), using of 360x288 (CIF1) is acceptable. Resolution zoom-in over CIF4 is not improve the quality of recognizing procedure.
• Fps: 25.
• Color: only color camera can be in use.
• Camera must be rigidly fixed.

Lighting

• The best working of detection is archived at medium lighting. In conditions of insufficient (night) or excessive (exposure) lighting, the quality of analytics can be reduced.
• Sharp changes of lighting can lead to short-time invalid analytics working.

Scene and camera angle

• The best position – camera "looks" to the scene vertically down. The better this requirement, the carefully the received estimation.
• Sizes of camera field of view: 2x2m is minimal, 4x4m is optimal (8x8 people).
• Background is static and is not changed sharply.
• In the recognized are there no moving objects except of people.
• Analytics can work inappropriately on specular surfaces and in case of sharp shadows from moved objects.
• Analytics can work inappropriately in case of in the camera field of view there are periodic movements of background objects (trees, working TV, etc.).
• People occulting by static objects is to be minimal (by columns, trees etc.).

Objects image

• Image quality: the image is to be clear, without visible defects from reducing procedure.
• Permissible size of a person (the area of a rectangular track around a person) as a percentage of the frame area: from 10% to 60%.

Other

• People shouldn't move by continuous flow, by groups by several people are counted properly.