Image forming apparatus and control method of image forming apparatus

An image forming apparatus comprising:

• a reading unit including a carriage configured to move in a predetermined direction and irradiate an original, the reading unit being configured to read the original to generate image data on the original;
• an image processing unit configured to perform image processing to the image data based on an adjustment condition for adjusting an image forming position of an image to be formed on a sheet;
• an image forming unit configured to form the image on the sheet based on the image data on which the image processing is performed by the image processing unit;
• and
• a controller configured to control the image forming unit to form a first measurement image on a first side of a sheet, control the image forming unit to form a second measurement image on a second side of the sheet, the second side being different from the first side, control the reading unit to obtain reading data related to the sheet on which the first measurement image and the second measurement image are formed, and generate the adjustment condition based on the reading data and a correction condition,
• wherein the controller generates the correction condition based on a reading result of the first side of the sheet and a reading result of the second side of the sheet, the first measurement image being formed on the first side, the second measurement image being formed on the second side.