Blocking-artifact detection in frequency domain for frame-rate up-conversion

被引:2
|
作者
Kim, Nam-Uk [1 ]
Lee, Yung-Lyul [1 ]
机构
[1] Sejong Univ, Dept Comp Engn, Digital Media Syst Lab, Seoul 05006, South Korea
基金
新加坡国家研究基金会;
关键词
Frame-rate up-conversion; Motion compensated interpolation (MCI); Occlusion detection; Blocking artifacts; Integer discrete cosine transform (DCT); MOTION ESTIMATION; INTERPOLATION;
D O I
10.1007/s00779-017-1019-z
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
In this paper, a blocking-artifact detection method is proposed for motion-compensated frame-rate upconversion (MC-FRUC) algorithms. In the MC-FRUC process, most of the notable blocking artifacts occur in unreliable motion-compensated regions. To find the unreliable motion-compensated regions, an occlusion detection (OD) method for which the neighboring motion vectors are used is applied. If an occlusion occurs, then the use of median filtering reduces any inappropriate motion-compensated errors; otherwise, the normal motion compensated interpolation (MCI) is applied. In addition, to reduce the occurrence of the blocking artifacts in the MC-FRUC algorithms, a blocking-artifact-reduction method for which the blocking-artifact strength in the frequency domain is applied to the occluded regions is utilized. The experiment results show that the proposed method shows more-favorable peak signal-to-noise ratio (PSNR) values compared with those of the conventional FRUC algorithms regarding full-HD (1920 x 1080) andWQXGA (2560 x 1600) sequences.
引用
收藏
页码:173 / 184
页数:12
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