公开(公告)号：US20230245279A1

公开(公告)日：2023-08-03

申请号：US18131752

申请日：2023-04-06

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Gaurav KHANDELWAL ,  Sai Snehith Garlapati ,  Vivek Maik D ,  Balaji Shashipreeth Racherla ,  Sweta Singh

IPC: G06T5/00 ,  G06T3/40 ,  G06T5/10 ,  G06T7/11

CPC classification number: G06T5/002 ,  G06T3/403 ,  G06T5/10 ,  G06T5/003 ,  G06T7/11 ,  G06T2207/20056

Abstract: Methods and systems for denoising media frames captured in low-light environment are provided. A method includes obtaining a media frame in pixel space using adaptive trimming of Fourier coefficients of an input media frame based on a threshold criterion, and obtaining a media frame in curvelet space by performing curvelet transform on the media frame in pixel space, extracting a texture frame based on texture details and a homogeneous frame based on homogeneous details, present in the media frame in pixel space, performing longitudinal and latitudinal filtering of the texture and homogeneous frames downscaled by a same factor, integrating the longitudinal and latitudinal filtered texture and homogeneous frames, upscaling the integration to obtain a curvelet media frame, and obtaining an output media frame by sharpening the curvelet media frame in multiple iterations based on partially sharpened curvelet media frames, the curvelet media frame, and the media frame in curvelet space.