公开(公告)号：US20200143517A1

公开(公告)日：2020-05-07

申请号：US16338703

申请日：2017-12-26

申请人： XIDIAN UNIVERSITY

发明人： Huixin Zhou ,  Dong Zhao ,  Runda Qian ,  Xiuping Jia ,  Jun Zhou ,  Hanlin Qin ,  Bo Yao ,  Yue Yu ,  Huan Li ,  Jiangluqi Song ,  Bingjian Wang ,  Yangqun Jin ,  Shenghui Rong ,  Kuanhong Cheng ,  Kun Qian

IPC分类号： G06T5/00 ,  G06T5/20

摘要： A non-uniformity correction method for an infrared image based on guided and high-pass filtering includes: assigning high-frequency component of first image frame of original image sequence to first fixed pattern noise f1; successively loading N-th image frame of the original image sequence with non-uniformity as current image frame, determining a difference between the current image frame and (N-1)-th image frame to obtain (N-1)-th differential image frame, and obtaining a relative change amplitude of each image element of (N-1)-th image frame according to the (N-1)-th differential image frame; and performing high-pass filtering based on a combination of a high-frequency component of the current image frame obtained through guided filtering and the relative change amplitude to obtain n-th fixed pattern noise fn, and performing non-uniformity correction on the current image frame according to fn to obtain a correction result of the current image frame, where N≥2, n≥2.

公开(公告)号：US10803557B2

公开(公告)日：2020-10-13

申请号：US16338703

申请日：2017-12-26

申请人： XIDIAN UNIVERSITY

发明人： Huixin Zhou ,  Dong Zhao ,  Runda Qian ,  Xiuping Jia ,  Jun Zhou ,  Hanlin Qin ,  Bo Yao ,  Yue Yu ,  Huan Li ,  Jiangluqi Song ,  Bingjian Wang ,  Yangqun Jin ,  Shenghui Rong ,  Kuanhong Cheng ,  Kun Qian

IPC分类号： G06K9/00 ,  H04N5/00 ,  G06T5/00 ,  G06T5/20

摘要： A non-uniformity correction method for an infrared image based on guided and high-pass filtering includes: assigning high-frequency component of first image frame of original image sequence to first fixed pattern noise f1; successively loading N-th image frame of the original image sequence with non-uniformity as current image frame, determining a difference between the current image frame and (N−1)-th image frame to obtain (N−1)-th differential image frame, and obtaining a relative change amplitude of each image element of (N−1)-th image frame according to the (N−1)-th differential image frame; and performing high-pass filtering based on a combination of a high-frequency component of the current image frame obtained through guided filtering and the relative change amplitude to obtain n-th fixed pattern noise fn, and performing non-uniformity correction on the current image frame according to fn to obtain a correction result of the current image frame, where N≥2, n≥2.