Requirements for the operation of the Abandoned object detector VI (Street)are given in the table:
| 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
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| Lighting | - Lighting in the scene is from 100 to 1000 lux
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| 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
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Object images | For abandoned objects, the optimum density is 100 pixels per meterMaximum signal-to-noise ratio (without the function of automatic signal amplification) is at least 42 dBResolution of the video image is at least 1280x960 pixelsImage isn't noisy and isn't distorted by artifacts of the compression algorithmDistortion 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)
