US 9,813,647 B2
Image processing apparatus, radiation imaging apparatus, image processing method, and storage medium
Tsuyoshi Kobayashi, Yokohama (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jun. 2, 2016, as Appl. No. 15/171,605.
Claims priority of application No. 2015-119710 (JP), filed on Jun. 12, 2015.
Prior Publication US 2016/0366352 A1, Dec. 15, 2016
Int. Cl. H04N 9/64 (2006.01); H04N 5/361 (2011.01); G06T 5/00 (2006.01); G06T 5/40 (2006.01); G06T 5/50 (2006.01); H04N 5/32 (2006.01)
CPC H04N 5/361 (2013.01) [G06T 5/002 (2013.01); G06T 5/40 (2013.01); G06T 5/50 (2013.01); H04N 5/32 (2013.01); G06T 2207/10116 (2013.01); G06T 2207/20224 (2013.01); G06T 2207/30061 (2013.01)] 17 Claims
OG exemplary drawing
 
1. An image processing apparatus comprising:
a first correction unit configured to perform correction processing of subtracting a first dark image obtained in a state without radiation irradiation from an object image, thereby removing a dark component of the object image;
an evaluation value obtaining unit configured to obtain an evaluation value by a varying dark component included in a corrected image that has undergone the correction processing based on the first dark image and a second dark image obtained after the first dark image; and
a second correction unit configured to perform correction processing of removing the varying dark component from the corrected image based on the evaluation value.