基于子帧缝合的老电影大面积破损修复  

An old film restoration method using subframe quilting

作　　者：夏天然 丁友东 于冰[1,2] 黄曦 XIA Tianran;DING Youdong;YU Bing;HUANG Xi(Shanghai Film Academy,Shanghai University,Shanghai 200072,China;Shanghai Engineering Research Center for Motion Picture Special Effects,Shanghai University,Shanghai 200072,China)

机构地区：[1]上海大学上海电影学院,上海200072 [2]上海大学上海电影特效工程技术研究中心,上海200072

出　　处：《上海大学学报（自然科学版）》2018年第4期503-511,共9页Journal of Shanghai University:Natural Science Edition

基　　金：国家自然科学基金资助项目(61402278);上海市科委科技攻关资助项目(16511101302);上海大学电影学高峰学科和上海电影特效工程技术研究中心资助项目(16dz2251300)

摘　　要：相较于噪声、斑点和划痕,大面积破损一直是老电影修复的一大难点.考虑到老电影序列中包含丰富的前后帧信息,提出一种基于子帧缝合的老电影帧画面修复方法.首先,在修复前对电影序列进行镜头分割和帧画面预处理,在选定破损帧的前后参考帧后,再根据破损帧的破损范围框选破损子帧和对应前后参考子帧;然后,将破损子帧作为黑帧处理,通过前后参考子帧插值得出合适的中间子帧;最后,将得到的中间子帧缝合于原破损帧的破损区域,进而完成老电影的大面积破损修复.该方法针对性地解决了老电影存在的大面积破损问题,亦可作为初步修复工具协助人工完成老电影大面积破损的半自动修复.Unlike noise,spots and scratches,widespread damage is the major difficulty in old film restoration.Considering that old film sequences contain rich frame information,a subframe quilting method for widespread damage in old films is suggested here.Before repair,the first step is to segment lens and preprocess frame screen.After selecting the forward and backward reference frames,we now choose the damaged subframes and the corresponding reference subframes.Then,we interpolate the intermediate subframes according to two reference subframes.Finally,we quilt the intermediate subframe into the damaged area,and complete the widespread damage restoration.This method not only solves the problem of widespread damage,but also assists old film repairers with preliminary repair.

关 键 词：老电影 帧修复 双向帧插值 块匹配 图像缝合 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]