CAJ | 학술논문

混合分辨率模型是多视角视频编码用来降低比特率的一种重要描述方法，本文提出了一种新的实现图像/视频序列的超分辨方法。在多视角框架中，使用相邻高分辨图像的高频信息对当前视角的低分辨图像进行高频成分补充，从而实现超分辨。邻域高分辨图像帧的投影图包含裂纹，本文使用了非均匀采样复原理论对其进行了修复，投影图中的其它空洞则由原始低分辨图像帧的上采样图像进行了填充。接着使用空洞填充反变换方法以及DCT 离散余弦变换对图像进行频率分解，将投影图的高频成分与原始低分辨图像的低频成分进行融合，再经过IDCT 离散余弦反变换即得到了最终的超分辨图像。实验仿真数据结果表明，该方法得到的超分辨图像比传统的插值上采样图像以及基于DCT的上采样图像无论是主观和客观评价，均有明显的改善。
혼합분변솔모형시다시각시빈편마용래강저비특솔적일충중요묘술방법，본문제출료일충신적실현도상/시빈서렬적초분변방법。재다시각광가중，사용상린고분변도상적고빈신식대당전시각적저분변도상진행고빈성분보충，종이실현초분변。린역고분변도상정적투영도포함렬문，본문사용료비균균채양복원이론대기진행료수복，투영도중적기타공동칙유원시저분변도상정적상채양도상진행료전충。접착사용공동전충반변환방법이급DCT 리산여현변환대도상진행빈솔분해，장투영도적고빈성분여원시저분변도상적저빈성분진행융합，재경과IDCT 리산여현반변환즉득도료최종적초분변도상。실험방진수거결과표명，해방법득도적초분변도상비전통적삽치상채양도상이급기우DCT적상채양도상무론시주관화객관평개，균유명현적개선。
Mixture resolution format is an important representation method in multi-view video coding to reduce the bit rate. To obtain the same spatial and temporal image/video resolution scale in the low resolution view, a novel super resolution method is presented. The cracks of the warped reference high resolution frame are restored by non-uniform sampling principle, and the holes of that are filled with the corresponding regions of the low resolution frame. Then, based on the reverse hole filling method and 2D Discrete Cosine Transform (DCT) image fusion, the high frequency components, which are fetched from the warped reference high resolution frame, are merged into the low resolution view to construct the output high resolution frame. Experimental results show that the proposed method outperforms the traditional up-sampling and DCT-based up-sampling methods.