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Watermark embedding method and device and watermark extracting method and device

A technology for watermark embedding and watermark extraction, which is applied in the fields of digital image processing and information security, and can solve problems such as poor robustness and affecting video quality.

Active Publication Date: 2021-12-07
CHINA MOBILE COMM LTD RES INST +1
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  • Claims
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Problems solved by technology

The least significant bit method (Least Significant Bit, LSB) is a typical spatial watermarking algorithm, which modifies the lowest bit of the chrominance component to complete the embedding of the watermark. This algorithm is simple to implement, but its robustness is poor, and it may also affect the video quality.

Method used

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  • Watermark embedding method and device and watermark extracting method and device
  • Watermark embedding method and device and watermark extracting method and device
  • Watermark embedding method and device and watermark extracting method and device

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Embodiment Construction

[0076] In order to make the technical problems, technical solutions and advantages to be solved by the embodiments of the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0077] Embedded watermark can be regarded as superimposing a weak signal (watermark) under a strong background (original image). Since the resolution of the human visual system HVS (Human Visual System) is limited, as long as the amplitude of the superimposed signal is lower than the contrast of HVS threshold, HVS cannot feel the existence of the signal, so by making certain adjustments to the original image, some watermark information can be embedded without changing the visual effect.

[0078] Based on the above analysis, the embodiment of the present invention provides a watermark embedding method, such as figure 1 shown, including:

[0079] Step 101: Obtain the original watermark image and original video;

[0080] Step 102: using...

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Abstract

The invention provides a watermark embedding method and device and a watermark extracting method and device, and belongs to the technical field of digital image processing and information security. The watermark embedding method comprises the following steps: acquiring an original watermark image and an original video; acquiring a video watermark by using the original watermark image; and embedding the video watermark frame by frame in the video frame of the original video through a method of modifying a pixel value, and converting the video frame embedded with the video watermark into a watermark video. According to the technical scheme, video invisible watermark embedding can be realized.

Description

technical field [0001] The invention relates to the technical fields of digital image processing and information security, in particular to a watermark embedding method, a watermark extraction method and a device. Background technique [0002] Digital watermarking technology is to embed watermark information into documents, images, audio, video and other carriers without affecting the carrier's perception, so it is not easy to be found or tampered with. The embedder of the watermark information can use the set algorithm key to extract the watermark, evaluate the difference between the extracted watermark information and the original watermark information through the corresponding evaluation criteria, and then determine whether the data containing the watermark information has been attacked or tampered with. [0003] As a kind of digital watermarking technology, video watermarking technology is an important means of video product protection such as video copyright protection,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/467H04N21/8358
CPCH04N19/467H04N21/8358
Inventor 高静
Owner CHINA MOBILE COMM LTD RES INST
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