US 11,812,002 B2
Method and device for correcting a scanned image and image scanning system
Bicheng Liu, Beijing (CN); Hao Yu, Beijing (CN); Weizhen Wang, Beijing (CN); Guangming Xu, Beijing (CN); Haojie Chi, Beijing (CN); Shangmin Sun, Beijing (CN); Chunguang Zong, Beijing (CN); and Yu Hu, Beijing (CN)
Filed by NUCTECH COMPANY LIMITED, Beijing (CN)
Filed on Jul. 21, 2021, as Appl. No. 17/382,236.
Claims priority of application No. 202010711447.5 (CN), filed on Jul. 22, 2020.
Prior Publication US 2022/0030132 A1, Jan. 27, 2022
Int. Cl. H04N 1/409 (2006.01); G06T 7/00 (2017.01); G06T 3/40 (2006.01); G06T 5/00 (2006.01); G06T 5/50 (2006.01); H04N 1/00 (2006.01)
CPC H04N 1/4092 (2013.01) [G06T 3/4007 (2013.01); G06T 5/006 (2013.01); G06T 5/50 (2013.01); G06T 7/97 (2017.01); H04N 1/00005 (2013.01); H04N 1/00037 (2013.01); G06T 2207/10008 (2013.01); G06T 2207/20021 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method for correcting a scanned image, comprising:
obtaining a scanned image of a scanned object;
detecting one or more reference objects from the scanned image;
determining a deformation parameter of each reference object of the one or more reference objects based on preset a standard parameter of the each reference object; and
correcting the scanned image based on the deformation parameters of the one or more reference objects comprising:
in response that a plurality of reference objects are detected from the scanned image and the plurality of reference objects have different deformations parameters, correcting images of different parts of the scanned image respectively based on the deformation parameters of each reference object; or
in response that a plurality of reference objects are detected from the scanned image and the plurality of reference have the same deformation parameter, correcting the entire scanned image based on the same deformation parameter; or
in response that one reference object is detected from the scanned image, correcting the entire scanned image based on the deformation parameter of the one reference object;
if the deformation parameter indicate that an image to be corrected is stretched in the vertical direction, performing, on the image to be corrected, at least one of the pixel interpolation processing in horizontal direction or the pixel sampling processing in vertical direction with a correction degree corresponding to a degree of stretching in the vertical direction; or
if the deformation parameter indicate that an image to be corrected is stretched in the horizontal direction, performing, on the image to be corrected, at least one of the pixel sampling processing in horizontal direction of the pixel interpolation processing in vertical direction with a correction degree corresponding to a degree of stretching in the horizontal direction;
wherein the image to be corrected is the entire scanned image or any one of image of different parts of the scanned image.