Abstract: In one embodiment, the present invention provides an apparatus which includes at least two sensors whose overlapping fields of view are matched by sectorization. Sensor signal output processing of a high resolution sensor and a low resolution sensor provide a detection device which achieves a substantially higher performance over devices which only logically combine the outputs of two individual detectors. In a particular embodiment, the high resolution sensor senses a visible wavelength, such as by video camera, and the low resolution is an infrared thermal sensor.