1. An image distribution system comprising an image input device for inputting an image, an image processing section, and a distribution device connected to a network for distributing a processed image, wherein the image processing section separates the image inputted with the image input device into an area to which a moving object image has been inputted and the other area to which no moving object image has been inputted, generates a synthesized image which is equal to the image inputted with the image input device with the area of the moving object image replaced with a corresponding area of an image inputted earlier showing stationary objects only, and outputs the synthesized image to the distribution device.