1. An image processing device comprising: circuitry configured to detect a marker appearing in an image by extracting a predetermined pattern of the marker from the image; in the event that the marker is detected in the image by extracting the predetermined pattern, replace an area of the marker in the image with a replacement image; in the event that the marker is not detected in the image by extracting the predetermined pattern, detect the marker by extracting a predetermined color of the marker from the image; and in the event that the marker is detected in the image by extracting the predetermined color, calculate a basic color of the replacement image; and replace an area of the marker in the image with the basic color, which is different than the replacement image.