1. A method, comprising: for an image frame of a sequence of image frames: converting, utilizing a first neurosynaptic core circuit, at least one pixel of the image frame to at least one neural spike; processing, utilizing a second neurosynaptic core circuit, the at least one neural spike to extract at least one salient feature from the image frame; generating, utilizing a third neurosynaptic core circuit, a map representing the at least one salient feature; and detecting, utilizing a fourth neurosynaptic core circuit, presence of an object of interest in the image frame based on the map; wherein each neurosynaptic core circuit comprises a plurality of electronic synapse devices interconnecting a plurality of electronic neurons to a plurality of electronic axons.