An imaging sensor system includes a control system that helps save energy, computing, and communication resources by capturing evaluation images with a gating image sensor and processing the evaluation images to determine whether there is a region of interest (ROI) present that warrants capturing a subsequent image with a gated image sensor for additional image processing. That is, the gating image sensor and preliminary processing operates as a gate for turning on the gated sensor for the additional image capturing and processing. The additional image captured by the gated sensor may include only the ROI, which is provided to an image processing algorithm for further image processing. In addition, a gating sensor may include infrared sensing to help determine whether the ROI includes thermal data indicative of human features.