Film sound restoring system and method based on optical imaging
A technology of optical imaging and film film, applied in image enhancement, image analysis, image data processing, etc., can solve the problems of image domain damage, damage, image damage, etc., achieve speed improvement, sound reproduction speed improvement, sound reproduction quality improvement Effect
Active Publication Date: 2022-01-28
COMMUNICATION UNIVERSITY OF CHINA
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Problems solved by technology
[0005] In view of the above-mentioned problems, the purpose of the present invention is to provide a film sound reproduction system based on optical imaging, to solve the problem that the existing film restoration methods in the prior art are still mainly manual restoration, and it takes 15 minutes to repair a 90-minute movie. A professional team of people worked for more than 3 months; and, the audio track film is essentially a modulated audio time-domain waveform recorded in the image domain, and the damage often includes both image damage and audio damage, and The image domain is mainly damaged, and the traditional method can only repair this damage from the audio domain
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[0046] Movie sound track film will be damaged from various aspects and links. During the storage stage, the humidity and temperature of the air will affect the film. Mildew, spontaneous combustion, natural fading, crystallization, etc. are common damages to film. In the sound reproduction process, due to the heat sensitivity of the film, the scanning beam of the projector used in the traditional sound reproduction method will also damage the film. Films are not allowed to be shown with current projectors, which is a huge loss for the cultural industry, and at the same time, every time the film is shown, it will cause damage to the film itself. At present, the restoration of movies is still dominated by manual restoration. Restoring a 90-minute movie requires a professional team of 15 people to work for more than 3 months; and, the audio track film is essentially a modulated audio time-domain waveform recorded in the image domain, and the damage often includes There are two as...
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The invention provides a film sound restoring system and method based on optical imaging, and the method comprises the following steps: firstly generating an audio track image according to an audio track identifier on a film through optical imaging equipment, carrying out the damage detection and judgment of the audio track image according to a chromaticity recognition technology and a symmetry judgment technology, and taking the audio track image which is confirmed to be damaged as a damaged image; repairing the damaged image to form a repaired image; subjecting the restored image to sound restoring processing, converting the restored image into a time domain waveform, forming restored audio, where the sound restoring mode is based on light beam scanning and photoelectric conversion in a traditional method; converting a moving scanning light beam into a traversal type pixel-level light seam, and converting luminous flux of a local area into luminosity integration of a global domain, and therefore, the sound restoring speed and the sound restore quality can be greatly and remarkably improved.
Description
technical field [0001] The present invention relates to the field of media restoration, and more specifically, to a system and method for sound restoration of film film based on optical imaging. Background technique [0002] Historical audio-visual materials have important artistic value. In recent years, due to the advancement of screen technology and projection technology, many famous old movies, such as "The Horse Thief", "The Pianist on the Sea", "Spirited Away", etc., have undergone 4K restoration and re-released. Very good word of mouth. A film strip can be divided into two parts: the soundtrack area and the picture area. The audio track is an important part of the film. The restoration of the audio track has a crucial impact on the restoration of old movies. Compared with the restoration of the picture part, the restoration of the audio track film has a great influence. However, the research on the restoration of the film audio track However, it has been neglected ...
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Login to View More IPC IPC(8): G06T7/00G06T5/00G06K9/62G06V10/762
CPCG06T7/0002G06F18/23G06T5/77
Inventor 叶龙王睿琦张勤方力钟微胡飞
Owner COMMUNICATION UNIVERSITY OF CHINA