Patent ID: 7933039

Claim:
An image forming apparatus comprising: an image reading unit that reads an image as a first image represented in a first color space; a color converting unit that converts the first image into a second image represented in a second color space; a storing unit that stores therein the first image and the second image: a printing unit that prints the second image stored in the storing unit; a first compressing unit that compresses the first image into a first compressed image and stores the first compressed image in the storing unit; a first decompressing unit that reads the first compressed image from the storing unit and decompresses the first compressed image into the first image, wherein the color converting unit converts the first image obtained by the first decompressing unit into the second image without storing the first image in the storing unit, and the second image obtained by converting the first image is stored in the storing unit; a second compressing unit that reads the second image from the storing unit, compresses the second image into a second compressed image, and stores the second compressed image in the storing unit; and a second decompressing unit that reads the second compressed image from the storing unit and decompresses the second compressed image into the second image without storing the second compressed image in the storing unit, wherein the printing unit prints the second image obtained by the second decompressing unit.