In this paper, a novel digital video resolution enhancement algorithm based on adaptive directional interpolation is proposed, where the directionality of the edge structure and the nonlocal self-similarity prior within the current frame as well as its adjacent frames are both considered. First, we establish the regularization equation that conforms to the prior model of a video frame and then take the classic bicubic interpolation result as the initial estimation to iteratively solve the restoration equation, in which the edge structures and contours in low resolution (LR) input are reconstructed to estimate and refine the desired high resolution (HR) output. Experimental results show that the proposed algorithm can effectively enhance the clarity of a video frame, with satisfying subjective visual quality and PSNR value.

中文翻译：

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一种用于数字视频分辨率增强的新型自适应方向插值算法

本文提出了一种新的基于自适应方向插值的数字视频分辨率增强算法，该算法考虑了边缘结构的方向性和当前帧及其相邻帧中的先验非局部自相似性。首先，我们建立符合视频帧先验模型的正则化方程，然后以经典的三次三次插值结果作为初始估计值来迭代求解恢复方程，其中低分辨率（LR）输入的边缘结构和轮廓重建以估计和完善所需的高分辨率（HR）输出。实验结果表明，该算法能够有效地提高视频帧的清晰度，同时满足主观视觉质量和PSNR值。