Image forming apparatus.

摘要

An image forming apparatus for determining and correcting image forming condition. Test image signals of a plurality of different density levels are generated, and a test image based on the test image signals is formed on an photosensitive drum. The density of the test image is measured and image forming condition is determined. The test image is printed on a recording sheet, and the density of the printed image is measured. The measured density of the printed image is compared with the density level of the test image signal. Correction to the image forming condition is performed in accordance with the comparison result.