-
公开(公告)号:US20230396717A1
公开(公告)日:2023-12-07
申请号:US18031931
申请日:2021-01-29
Applicant: Hewlett-Packard Development Company, L.P.
Inventor: Kiyoun LEE , Minki CHO
IPC: H04N1/00
CPC classification number: H04N1/00037 , H04N1/00092 , H04N1/00018 , H04N1/00015
Abstract: An example image forming apparatus includes an image forming unit to form an image on a print medium, a verification scanning unit to scan a first surface of the print medium on which an image has been formed and to scan a second surface on which no image has been formed, and a processor to determine, based on information on a position of a streak included in a scanned image of the first surface or the second surface, whether the streak has been caused by an image forming unit or the verification scanning unit.
-
公开(公告)号:US20230297797A1
公开(公告)日:2023-09-21
申请号:US18018763
申请日:2021-01-22
Applicant: Hewlett-Packard Development Company, L.P.
Inventor: Kiyoun LEE , Kimin KANG , Yousun BANG
CPC classification number: G06K15/027 , G06K15/002 , G06K15/1881 , G03G15/5016
Abstract: An example operation method of an image forming apparatus includes forming a test image with respect to a pattern used for diagnosing an image-quality state of a printout output by the image forming apparatus, obtaining a test signal corresponding to the test image via a sensor of the image forming apparatus, obtaining image-quality state information indicating an image-quality state of the test image based on the test signal corresponding, identifying a type of a screen corresponding to halftone information indicating a resolution of the printout based on the image-quality state information, and performing a first image forming operation according to the type of the screen.
-