A physical concealment device and digital detection method of a single optical path surveillance video watermark
A monitoring video, single optical path technology, applied in closed-circuit television systems, image data processing, image data processing and other directions, can solve problems such as hidden real-time watermarks that are not seen
Active Publication Date: 2018-08-21
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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According to research, the current public video watermark hiding technologies are all based on digital image processing, and many different hiding algorithms have been proposed, but no real-time watermark hiding technology using physical means has been seen.
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[0041] The following describes the present invention in further detail with reference to the accompanying drawings and specific embodiments, but it does not limit the protection scope of the present invention.
[0042] See attached figure 1 , The new curing structure device used for the single-light path hidden watermark of surveillance video of the present invention includes three parts: a security surveillance camera lens 1, a CCD detector 12 glued with a watermark mask, and a security camera 13. Among them, the security surveillance camera lens is used to shoot the surveillance scene, and its specific parameters have no special requirements. A general commercial security surveillance camera lens can be used, and a CCD detector glued with a watermark mask is used to watermark and hide the optical image from the security lens. Detection is installed on the image plane of the security surveillance camera lens. There are no special requirements for the specific parameters of the su...
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The invention discloses a video surveillance anti-counterfeit watermark real-time shooting hiding device and a detection method. The video surveillance anti-counterfeit watermark real-time shooting hiding device specifically comprises an imaging lens set, an e-index double random phase modulation watermark mask, a monitoring camera CCD and the like. The device comprises two implementation structures; one structure is a curing structure formed in the mode that the watermark mask is glued to the surface of a CCD glass cover plate; the other structure is a replaceable and adjustable structure formed in the mode that the transmission mask is not fixed in a glued mode. Watermark physical hiding is achieved in the mode that the e-index double random phase modulation transmission type watermark mask is used for modulating the strength of an optical image, and the device only comprises an imaging optical path and is very simple. The watermark digital detection method of the device is achieved in the mode that a random phase diagram generating the watermark mask performs demodulation and includes the process of obtaining the logarithm of the image and the process of performing Fourier transformation on pure-phase functions.
Description
【Technical Field】 [0001] The invention belongs to the technical field of surveillance video anti-counterfeiting watermark hiding and detection technology, in particular to a single optical path surveillance video watermark physical hiding device and digital detection method, specifically for surveillance video anti-counterfeiting watermark real-time shooting physical hiding device and automatic monitoring video hiding watermark Test new methods. 【Background technique】 [0002] Video surveillance is an important part of the security system. Traditional surveillance systems include front-end cameras, transmission cables, and video surveillance platforms. Cameras can be divided into network digital cameras and analog cameras, which can be used as front-end video image signal collection. It is a comprehensive system with strong defense capabilities. Video surveillance is widely used in many occasions for its intuitive, accurate, timely and rich information content. In recent year...
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IPC IPC(8): H04N7/18G06T1/00
Inventor 潘卫清
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY