1. An AR image processing method comprising the steps: obtaining a first captured image of a scene in a first field of view which is captured by a camera and which includes an AR marker and its surroundings; causing a first AR analyzer to analyze the first captured image of the scene which is captured by the camera and which includes an AR marker image and its surroundings, determine a position, posture, and scale of the AR marker image in the first field of view, and virtually place a corresponding CG object at an appropriate position in the first field of view corresponding to the position, posture, and scale of the AR marker image; causing a second AR analyzer to calculate, for the CG object virtually placed at the appropriate position in the first field of view, appearance of the CG object in a second field of view of the camera in a second captured image subsequently captured in the second field of view by the camera; causing a CG rendering unit to composite an image of the CG object in the appearance in the second field of view, at an appropriate position in the second captured image of the camera; and causing a display unit to display the composite image.