System and method for sound reproduction of movie film based on optical imaging
An optical imaging and film film technology, applied in image analysis, image enhancement, image data processing, etc., can solve the problems of image domain damage, damage, image damage, etc., to improve the sound quality, speed, and speed of sound reproduction Effect
Active Publication Date: 2022-05-31
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] The film soundtrack film will be damaged from all aspects and links. During the storage stage, the humidity and temperature of the air will have an impact on the film. Mildew, spontaneous combustion, natural fading, and crystallization are all common damage to the film. In the process of sound reproduction, due to the thermal sensitivity of the film, the scanning beam of the projector used in the traditional sound reproduction method will also cause damage to the film. The film is not allowed to use the current projector to show, which is a huge loss to 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 the film is still mainly manual restoration. Repairing a 90-minute movie requires a professional team of 15 people to work for more than 3 months; and the soundtrack film is essentially a modulated audio time-domain waveform recorded in the image domain, and the damage that oc...
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The present invention provides a sound reproduction system and method based on optical imaging. Firstly, an optical imaging device is used to generate an audio track image according to an audio track mark on the film, and then the audio track image is processed according to chromaticity recognition technology and symmetry judgment technology. Damage detection and judgment, and the confirmed damaged audio track image is regarded as a damaged image; then the damaged image is repaired to form a repaired image; and then the repaired image is restored to convert the repaired image into a time-domain waveform to form The audio restoration method is based on beam scanning and photoelectric conversion in the traditional method. The moving scanning beam is converted into a traversing pixel-level optical slit, and the luminous flux in a local area is converted into a photometric integral in the global domain. Thus, The sound reproduction speed and sound reproduction quality can be significantly improved.
Description
technical field [0001] The present invention relates to the field of media restoration, and more particularly, to a system and method for sound reproduction of film films 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 well-known old movies, such as "The Horse Thief", "The Pianist at Sea", "Spirited Away", etc., have undergone 4K restoration and re-released, and have also won Very good word of mouth. The motion picture film can be divided into two parts: the audio track 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 the old film. Compared with the restoration of the picture part, the restoration of the audio track has a great influence. However, the research on the restoration of the audio track of the f...
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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