1. A pedestrian perception alert system configured to issue a warning in real-time when driver visual perception of a pedestrian is difficult, the pedestrian perception alert system comprising: a video camera configured to capture video image; an alert for issuing the warning; a processor in electrical communication with the video camera; a Pedestrian Detection Unit (“PDU”) configured to analyze the video image to detect a pedestrian; a Global Clutter Analysis Unit (“GCAU”) configured to generate a global clutter score, the global clutter score measuring the clutter of the entire video image; and a Local Pedestrian Clutter Analysis Unit (“LPCAU”) configured to generate a local pedestrian clutter score, the local pedestrian clutter score measuring the clutter of each of the pedestrians detected in the video image, wherein when the PDU detects a pedestrian in the video image the processor 16 initiates both the GCAU and the LPCAU, the processer processes the global clutter score and local pedestrian clutter score so as to generate a pedestrian detection score, and processor 16 further actuating the alert when the pedestrian detection score is outside of a predetermined threshold so as to warn a driver that it is difficult to visually perceive a pedestrian.