US 9,811,882 B2
Method and apparatus for processing super resolution image using adaptive preprocessing filtering and/or postprocessing filtering
Dae Yeol Lee, Daejeon (KR); Se Yoon Jeong, Daejeon (KR); Suk Hee Cho, Daejeon (KR); Jong Ho Kim, Daejeon (KR); Hui Yong Kim, Daejeon (KR); Sung Chang Lim, Daejeon (KR); and Jin Soo Choi, Daejeon (KR)
Assigned to ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, Daejeon (KR)
Filed by Electronics and Telecommunications Research Institute, Daejeon (KR)
Filed on Sep. 22, 2015, as Appl. No. 14/860,972.
Claims priority of application No. 10-2014-0131779 (KR), filed on Sep. 30, 2014; and application No. 10-2015-0032697 (KR), filed on Mar. 9, 2015.
Prior Publication US 2016/0093022 A1, Mar. 31, 2016
Int. Cl. G06T 3/40 (2006.01); H04N 7/01 (2006.01)
CPC G06T 3/4053 (2013.01) [H04N 7/0117 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An image processing method, comprising:
dividing an input video into a plurality of intervals;
determining a preprocessing filter and a postprocessing filter based on frames of the input video included in a reference interval of the plurality of intervals;
performing filtering on the frames based on the preprocessing filter;
reconstructing a signal of each of the frames on which the filtering is performed;
performing filtering on the frames using the postprocessing filter; and
outputting an output video comprising the filtered frames,
wherein each of the frames comprises the reconstructed signal,
wherein the determining of the preprocessing filter and the postprocessing filter comprises:
calculating contrast information of the frames in the reference interval, and determining, based on the contrast information, whether a contrast filter is to be applied as the preprocessing filter, and
determining a parameter to be applied to the contrast filter based on the contrast information and a contrast threshold, in response to the contrast filter being determined to be applied as the preprocessing filter, and
wherein a strength of the contrast filter is adjusted based on a difference between the contrast information and the contrast threshold.