Patent ID: 7619792

Claim:
An image forming apparatus having a calibration mode in which a calibration image is formed on a print medium to correct an image forming condition, the image forming apparatus comprising: a detection portion adapted to detect information on the print medium; a determination portion adapted to determine, on the basis of the information on the print medium detected by said detection portion, whether the print medium is a sheet recommended as a print medium for use in the calibration mode; a setting portion adapted to set a calibration condition corresponding to the recommended sheet on the basis of said determination portion; a correction portion adapted to correct the image forming condition on the basis of the calibration condition set by said setting portion; and a reading portion adapted to output the calibration image formed on the print medium as a luminance, wherein the calibration condition has a target luminance value of an output from said reading portion in accordance with the type of recommended sheet to obtain a maximum amount of toner application of the color material formable by the apparatus, wherein said setting portion sets the target luminance in accordance with the type of recommended sheet determined by said determination portion, and wherein when the print medium is not the recommended sheet, the calibration condition has a target luminance value larger than the target luminance value for the recommended sheet, and wherein when said determination portion determines that the print medium is not the recommended sheet, said setting portion sets the target luminance larger than the target luminance value for the recommended sheet.