The invention provides a construction alert area monitoring and
early warning system and method based on image recognition. The
system comprises an image input module, an
image splicing module, an interactive calibration module, a
pedestrian detection module, a visual intrusion module, a
feature extraction module, and a decision module. The visual intrusion detection, target detection and re-recognition techniques are combined, and cameras are arranged around a construction alert area or dangerous construction equipment to acquire surrounding environment information and in-out person information in real time, so that an operator can replace an early warning trigger area and operator registration information at any time, and whether a person invasion
signal exists in the early warning trigger area or not is updated in real time; and when the person invasion
signal exists, activation is carried out, an alarm is given to remind violation personnel to forbid entering the area, and the safety of the construction alert area is guaranteed.