US 11,722,795 B2
Image processing device for noise reduction using dual conversion gain and operation method thereof
Daeyoung Kim, Hwaseong-si (KR); Kundong Kim, Seongnam-si (KR); Jongwoo Kim, Suwon-si (KR); and Suyoung Lee, Daejeon (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Feb. 14, 2022, as Appl. No. 17/670,793.
Claims priority of application No. 10-2021-0083080 (KR), filed on Jun. 25, 2021.
Prior Publication US 2022/0417457 A1, Dec. 29, 2022
Int. Cl. H04N 5/355 (2011.01); H04N 25/59 (2023.01); H04N 25/60 (2023.01); H04N 25/587 (2023.01)
CPC H04N 25/59 (2023.01) [H04N 25/587 (2023.01); H04N 25/60 (2023.01)] 19 Claims
OG exemplary drawing
 
1. An image processing device comprising:
an image sensor including a pixel array, the pixel array being configured to
generate a first pixel signal corresponding to a first conversion gain based on receiving light reflected from an object, and
generate a second pixel signal based on receiving light reflected from the object corresponding to a second conversion gain from pixels sharing a floating diffusion region, and
the image sensor being configured to generate first image data and second image data based on the first pixel signal and the second pixel signal; and
an image signal processor configured to generate an output image based on the first image data and the second image data, the image signal processor including
a normalization circuit configured to normalize the first image data based on a dynamic range of the second image data to generate third image data; and
a blending circuit configured to generate the output image based on the second image data and the third image data in response to an ambient illuminance of the object.