ROI (Region of Interest): Maximum 4 regions of interest are configurable for individual streams. Detected faces and license plate can be set as ROI and tracked dynamically. In low bit rate situation, the encoding resources would be mainly allocated to the ROI to improve the image quality. The improvements can be controlled through the ROI level. The activation of ROI function would reduce the image quality of other region, while sufficient bandwidth would eliminate the effect of ROI.
In 2 Series, fixed ROI can be set for each stream and dynamic tracking is not supported. For 4 Series products, 4 fixed ROIs can be allocated for each stream and dynamic tracking is not supported.