1. An article delivery system comprising a camera and at least one display, wherein the camera includes a capture that captures an image of an area, and an image processor that detects a person included in the image of the area captured by the capture, and wherein, in a case where the area is a first area relating to article delivery, the image processor extracts an image of a first specific region corresponding to a first range set in the first area from the image of the first area captured by the capture, performs processing treatment on the person detected by the image processor in the image of the region other than the first specific region of the images of the first area, and outputs a composite image to the display, in which the image of a region other than the first specific region in which the processing treatment is performed on the person and the extracted image of the first specific region are composed.