A Restoration Method for Faded and Flickered Old Movies
A restoration method and technology of old movies, applied in image enhancement, image analysis, instruments, etc., can solve the problems of less fading and flickering research, fading and flickering, etc., and achieve the effect of widening the repairable range, concise formula, and simple interaction
Active Publication Date: 2019-01-11
上电影业(上海)有限公司
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[0004] However, classic old movies include not only black and white old movies, but also many old color movies. Such movies also have flickering phenomena, which are collectively referred to as faded flickering
Fading flicker is less studied than luminance flicker restoration in old film restoration
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[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0044] Such as figure 1 As shown, a method for repairing the fading and flickering of old movies includes the following steps:
[0045] 101: Record the entire sequence to be processed as P, perform splitting processing on the sequence P, the number of scoring shots is n, and the splitting sequence is P i ;
[0046] Since the color transfer algorithm used in the post-processing flicker has certain requirements on the structure of the image, only when the layout structure between the reference image frame and the frame to be processed is similar, the processing result is the most ideal, so mirroring is a necessary step;
[0047] 102: Sequence P i Perform RGB average statistics to judge whether there is flicker; flicker has the characteristics of being difficult to observe in a single frame, and can only be clearly found when it is continuously...
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The invention relates to a restoration method for color fading and flashing in old films, and the method comprises the following steps: firstly importing a to-be-processed sequence, doing storyboards to the to-be-processed sequence and determining whether there exists flashing in each group of storyboards through the statistical curves of the RGB channel averages; secondly, selecting proper reference frames from the storyboards with flashing; if there are no reference frames, generate reference frames by correcting colors; if there are reference frames, directly choose to use them. thirdly, using a color transmission algorithm to do restoration on flashing until treatment to the pair of storyboards is completed; and fourthly, referring to the above treatment regarding the re-screening for reference frames from the next group of storyboards until all groups in the sequence are completed in their treatment. The interactions in the method are simple to make; the processing speed is fast and it can be applied to most restoration of global color fading or flashing.
Description
technical field [0001] The invention relates to the field of computer image restoration, in particular to a restoration method for faded and flickering old movies. Background technique [0002] Old movies are the epitome of history and culture, and also an extremely precious visual material. However, due to the limited preservation conditions of early films in our country, coupled with human factors such as transfer and excessive playback times, the existing old films have basically suffered a certain degree of damage, which directly affects the viewing effect. With the development of digital image processing technology, it is possible to repair the damage of old movies. [0003] Flicker is one of the most common problems in old film damage. Existing research mainly focuses on luminance flicker. The main restoration methods need to model the flicker in the image sequence, and then estimate the flicker parameters of the model. Zhou Lei et al. designed a block-based local ar...
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IPC IPC(8): G06T5/00
CPCG06T5/005G06T2207/10016G06T2207/10024
Inventor 丁友东黄曦黄东晋谢志峰吴兵唐鹏斌于冰
Owner 上电影业(上海)有限公司