US 11,949,833 B2
Image reading apparatus, control method thereof, and storage medium
Yuki Kamio, Kawasaki (JP); Katsutoshi Miyahara, Kawasaki (JP); Yuichi Sato, Kanagawa (JP); and Takahiro Ode, Kawasaki (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Oct. 13, 2021, as Appl. No. 17/500,663.
Application 17/500,663 is a continuation of application No. 17/030,957, filed on Sep. 24, 2020, granted, now 11,178,304.
Claims priority of application No. 2019-185971 (JP), filed on Oct. 9, 2019.
Prior Publication US 2022/0070327 A1, Mar. 3, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. H04N 1/047 (2006.01); H04N 1/00 (2006.01); H04N 1/03 (2006.01)
CPC H04N 1/047 (2013.01) [H04N 1/00045 (2013.01); H04N 1/00068 (2013.01); H04N 1/03 (2013.01)] 53 Claims
OG exemplary drawing
 
1. An image processing apparatus comprising:
an obtaining unit configured to obtain image data by reading a chart on which a plurality of dot patterns are printed isolatedly from one another while moving relatively between the chart and an image sensor, wherein the plurality of dot patterns includes a first dot pattern and a plurality of peripheral dot patterns around the first dot pattern; and
a derivation unit configured to, based on the image data, derive information on an inclination angle of the image sensor.