US 11,736,626 B2
Reading device and image forming apparatus with foreign-object detection by comparing image from reading background with image from reading background and recording medium
Yoshio Konno, Kanagawa (JP); Tatsuya Ishii, Kanagawa (JP); Tohru Matsumoto, Kanagawa (JP); Kohta Aoyagi, Kanagawa (JP); Satoshi Nakayama, Kanagawa (JP); Hideyo Makino, Tokyo (JP); Susumu Mikajiri, Tokyo (JP); and Kimiharu Yamazaki, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Yoshio Konno, Kanagawa (JP); Tatsuya Ishii, Kanagawa (JP); Tohru Matsumoto, Kanagawa (JP); Kohta Aoyagi, Kanagawa (JP); Satoshi Nakayama, Kanagawa (JP); Hideyo Makino, Tokyo (JP); Susumu Mikajiri, Tokyo (JP); and Kimiharu Yamazaki, Kanagawa (JP)
Filed on May 26, 2022, as Appl. No. 17/825,369.
Claims priority of application No. 2021-112423 (JP), filed on Jul. 6, 2021.
Prior Publication US 2023/0010640 A1, Jan. 12, 2023
Int. Cl. H04N 1/00 (2006.01); H04N 1/028 (2006.01); H04N 1/409 (2006.01); H04N 1/06 (2006.01); H04N 1/12 (2006.01)
CPC H04N 1/00047 (2013.01) [H04N 1/00005 (2013.01); H04N 1/00013 (2013.01); H04N 1/00037 (2013.01); H04N 1/00063 (2013.01); H04N 1/00074 (2013.01); H04N 1/00084 (2013.01); H04N 1/00798 (2013.01); H04N 1/02815 (2013.01); H04N 1/0692 (2013.01); H04N 1/124 (2013.01); H04N 1/4097 (2013.01); H04N 2201/0446 (2013.01); H04N 2201/0458 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A reading device comprising:
an image reading device configured to read an image on a recording medium being conveyed;
a background device serving as a background image when the image is read by the image reading device; and
a foreign-object detector configured to compare a first read image obtained as the background device is read by the image reading device with a second read image obtained as the background device and the recording medium are read by the image reading device to detect an attached foreign object.