To always secure the reliability of data read from an encoded image when similarly expanding or reducing an image including a readable image and the encoded mage to record it on a recording medium.

When the readable image and the encoded image are similarly expanded or reduced and are recorded on the recording medium, the readable image and the encoded image (dot code) are separated from each other by a dot code image separation part 18, and the readable image is expanded or reduced by an expansion/reduction image generation part 16, and the encoded image is not expanded nor reduced and is subjected to correction like recording position change by a dot code image correction part 20, and the expanded or reduced readable image and the corrected encoded image are composited in a composition part 22 and are recorded on the recording medium by a printer 28.