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Accurate Spatio-temporal Restoration of Compact Single Frame Defects in Aged Motion Pictures

机译:准确的时空恢复在老化运动图像中的紧凑型单帧缺陷

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Spikes of brightness often affect locally single frames of aged motion pictures, because of dust, dirt and scratches injuring film surface. In this paper we present a method for accurate digital detection and restoration of such a kind of film defects. The method evaluates both global and local intra-frame disparity statistics after motion-compensation and uses them to detect abnormal spikes. It recovers image structure from the same frame by linear interpolation of defect surroundings and refines details from temporal neighbourhood. Weights of the blending filter are set according to local reliability of the motion estimation maps. A texture pattern is also extracted from spatial support areas, and added to regions with limited recover from the temporal neighbourhood. Experiments performed on synthetic sequences show very high recall and precision rates, and low recovery errors. High quality restoration of severely injured sequences is shown.
机译:由于灰尘,污垢和伤害薄膜表面,亮度的尖峰通常会影响老年运动图像的局部单帧。在本文中,我们提出了一种用于准确数字检测和恢复这种薄膜缺陷的方法。该方法在运动补偿后评估全局和局域内差异统计数据,并使用它们来检测异常尖峰。它通过缺陷环境的线性插值来恢复来自同一帧的图像结构,并从颞邻域中精制细节。根据运动估计图的局部可靠性,将混合滤波器的重量设置。还从空间支撑区域中提取纹理图案,并添加到具有来自时间邻域的有限恢复的区域。对合成序列进行的实验表现出非常高的召回和精确率,以及低恢复误差。显示了严重受伤序列的高质量恢复。

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