US 11,889,242 B2
Denoising method and denoising device for reducing noise in an image
Pilsu Kim, Hwaseong-si (KR); Seungwon Choi, Hwaseong-si (KR); and Jongseong Choi, Hwaseong-si (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Nov. 19, 2021, as Appl. No. 17/531,089.
Claims priority of application No. 10-2021-0055425 (KR), filed on Apr. 29, 2021.
Prior Publication US 2022/0368874 A1, Nov. 17, 2022
Int. Cl. H04N 9/79 (2006.01); G06T 5/00 (2006.01); G06T 3/40 (2006.01); H04N 23/84 (2023.01); H04N 25/13 (2023.01)
CPC H04N 9/7908 (2013.01) [G06T 3/4015 (2013.01); G06T 5/002 (2013.01); G06T 5/004 (2013.01); H04N 23/843 (2023.01); H04N 25/134 (2023.01); G06T 2207/10024 (2013.01); G06T 2207/20024 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of reducing noise in an input image corresponding to a color filter array of an image sensor, the method comprising:
setting, as a local window among color pixels included in the input image, a target pixel and neighboring pixels adjacent to the target pixel;
determining color pixel values for the target pixel and each of the neighboring pixels included in the local window;
generating local color average values by averaging, color by color, the color pixel values;
generating offset color pixel values by converting the color pixel values of the target pixel and the neighboring pixels based on the local color average values; and
generating a compensated color pixel value of the target pixel by adjusting the color pixel value of the target pixel based on the offset color pixel values.