Patent ID: 7791477

Claim:
A security system, comprising: a surveillance unit comprising a visible light camera configured to detect video data from within a first field of view (FOV) at a first rate and an infrared (IR) imager configured to detect IR data within the first FOV; an IR detection module configured to determine whether at least a portion of the IR data is one of within a predetermined IR range, above a predetermined IR threshold, and below a predetermined IR threshold; a digital signal processing (DSP) module; and a processor configured to identify a region of interest (ROI) within the video data based on an output of the IR detection module, the ROI comprising a portion of the first FOV that is less than the first FOV, the visible light camera further configured to detect the video data at a second rate that is increased with respect to the first rate after the ROI is identified, the processor further configured to transmit the video data to the DSP module, the DSP module configured to automatically analyze the video data within the ROI.