An image forming apparatus includes: an image forming unit that includes a developing unit with a developing roller to form an image using toner; a controller; and a detection unit that detects a plurality of toner patches formed at different densities on an image carrier by the image forming unit. The holding apparatus defines a through hole. The anti-reflection film for plasma display front panel of the invention has excellent anti-reflection properties and is excellent in transparency, near infrared ray shielding properties, color tone correction properties and antistatic properties. Based on this instruction input, the control unit 100 controls the OSD unit 20 and a baseband processing unit 30 to synthesize the capture assist mark corresponding to the instruction with a video signal from the camera unit 10.