Information processing apparatus and image forming apparatus

An image forming apparatus including a generator which generates image data and an image forming unit which forms an image on a recording medium based on the image data outputted from the generator, the image forming comprising:

• a first receiver configured to receive image data;
• a light source configured to output light based on the image data received by the first receiver;
• a photosensitive member;
• a rotatable polygon mirror having a plurality of reflection surfaces and configured to rotate to deflect the light outputted from the light source by using the plurality of reflection surfaces and scan the photosensitive member;
• a light receiver configured to receive the light deflected by the rotatable polygon mirror;
• an identifier configured to identify a reflection surface to be used for the scanning of the photosensitive member of the plurality of reflection surfaces;
• a first outputter configured to output a predetermined signal in response to the receiving of the light by the light receiver while the light based on the image data inputted to the first receiver is being outputted from the light source, stop the predetermined signal after output of the image data for one surface of a recording medium completes, and restart the output of the predetermined signal in response to a time when image formation for one surface of a recording medium subsequent to image formation of the one surface of the recording medium is to be started, wherein the first outputter outputs the predetermined signal based on a result of the identifying by the identifier such that the output is restarted from the predetermined signal based on the light deflected by a specific reflection surface of the plurality of reflection surfaces, and
• the generator comprising:
• a second receiver configured to receive the predetermined signal output from the first outputter;
• a corrector configured to correct the image data corresponding to scan lines included in an image for the subsequent one surface of a recording medium with correction data corresponding to the reflection surface corresponding to the scan lines, based on that the predetermined signal first received by the second receiver after the output of the predetermined signal is restarted indicates the specific reflection surface;
• and
• a second outputter configured to start outputting the image data for the subsequent one surface of a recording medium corrected by the corrector to the image forming unit in response to a start of reception of the predetermined signal from the first outputter.