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• Objects or areas where there is little contrast in color or brightness with the background may not be detected.
• Small objects and changes on the screen may not be detected.
• Partial or entire changes in brightness on the screen may trigger detection.
• When there are multiple overlapping objects, there may be a change in detection. For example, objects passing
may either not be detected or the timing of detection may be incorrect.
• When there are large numbers of objects in the scene, objects may not be properly detected.
