| 摘要 |
A high-density area of a low-reflectance patch image is accurately detected. There is an image forming apparatus that detects the density of a patch image by radiating light from a laser oscillator 701 and receiving reflected light reflected off the patch image using a line sensor 704. The density of a black patch image 720 having a low reflectance is detected from the difference between the position at which reflected light from a yellow patch image 710 is received and the position at which reflected light from a superimposed toner image that is transferred in such a manner that the yellow patch image 730 is superimposed on the top of the black patch image 720 is received.
|
