US 11,995,487 B2
Identify type of screen according to image quality of image forming apparatus
Kiyoun Lee, Seongnam-si (KR); Kimin Kang, Seongnam-si (KR); and Yousun Bang, Seongnam-si (KR)
Assigned to Hewlett-Packard Development Company, L.P., Spring, TX (US)
Appl. No. 18/018,763
Filed by Hewlett-Packard Development Company, L.P., Spring, TX (US)
PCT Filed Jan. 22, 2021, PCT No. PCT/US2021/014528
§ 371(c)(1), (2) Date Jan. 30, 2023,
PCT Pub. No. WO2022/046161, PCT Pub. Date Mar. 3, 2022.
Claims priority of application No. 10-2020-0106899 (KR), filed on Aug. 25, 2020.
Prior Publication US 2023/0297797 A1, Sep. 21, 2023
Int. Cl. G06K 15/02 (2006.01); G03G 15/00 (2006.01); G06K 15/00 (2006.01)
CPC G06K 15/027 (2013.01) [G03G 15/5016 (2013.01); G06K 15/002 (2013.01); G06K 15/1881 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An operation method of an image forming apparatus, the operation method comprising:
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 for the pattern 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;
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.