US 12,363,451 B2
Color interpolation method for multispectral filter array and image acquisition device
Sangyoon Lee, Suwon-si (KR); Moongi Kang, Seoul (KR); Woo-Shik Kim, Suwon-si (KR); and Kyeonghoon Jeong, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR); and UIF (University Industry Foundation), Yonsei University, Seoul (KR)
Filed by SAMSUNG ELECTRONICS CO., LTD., Suwon-si (KR); and UIF (University Industry Foundation), Yonsei University, Seoul (KR)
Filed on Nov. 16, 2023, as Appl. No. 18/511,660.
Claims priority of application No. 10-2023-0039264 (KR), filed on Mar. 24, 2023; and application No. 10-2023-0052210 (KR), filed on Apr. 20, 2023.
Prior Publication US 2024/0323549 A1, Sep. 26, 2024
Int. Cl. H04N 23/84 (2023.01); H04N 23/10 (2023.01); H04N 23/11 (2023.01); H04N 23/30 (2023.01); H04N 25/11 (2023.01); H04N 25/131 (2023.01); H04N 25/133 (2023.01); H04N 25/30 (2023.01); G06T 3/4015 (2024.01)
CPC H04N 23/843 (2023.01) [H04N 23/10 (2023.01); H04N 23/11 (2023.01); H04N 23/30 (2023.01); H04N 25/11 (2023.01); H04N 25/131 (2023.01); H04N 25/133 (2023.01); H04N 25/30 (2023.01); G06T 3/4015 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A color interpolation method for a multispectral filter array (MSFA), the color interpolation method comprising:
acquiring a raw multispectral image based on the MSFA;
generating a guide image for color interpolation of the raw multispectral image;
generating a difference image between the raw multispectral image and the guide image,
generating a demosaiced difference image by performing color interpolation based on the difference image, and
generating a demosaiced multispectral image based on the demosaiced difference image and the guide image,
wherein the generating of the guide image comprises:
generating a low-frequency multispectral image by filtering the raw multispectral image by using a low-pass filter;
generating a high-frequency multispectral image based on a difference between the raw multispectral image and the low-frequency multispectral image; and
generating the guide image by adding the low-frequency multispectral image and the high-frequency multispectral image.