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Watermark embedding and watermark extracting method, device and apparatus

A watermark embedding and watermarking technology, applied in watermark extraction methods, electronic equipment and storage devices, devices, and watermark embedding fields, can solve problems such as ineffective application of business scenarios, insufficient embedding capacity, and small degree of resistance to scaling.

Active Publication Date: 2020-03-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, once the image is scaled and attacked, the existing image watermarking technology cannot be effectively applied to real business scenarios
The main reason is that the existing image watermarking technology for scaling attacks has an extremely insufficient embedding capacity, or the degree of anti-scaling is small

Method used

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

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Embodiment Construction

[0126] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the application. However, the present application can be implemented in many other ways different from those described here, and those skilled in the art can make similar promotions without violating the connotation of the present application. Therefore, the present application is not limited by the specific implementation disclosed below.

[0127] The first embodiment of the present application provides a watermark embedding method, which is combined below figure 1 , figure 2 Be explained.

[0128] Such as figure 1 As shown, in step S101, a reference image resolution corresponding to a first image is determined according to at least one preset reference image resolution; the first image is an image to be embedded with watermark information.

[0129] The watermark information refers to identification information to be embedded into the first image. ...

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Abstract

The invention discloses a watermark embedding method, which comprises the steps of determining a reference image resolution corresponding to a first image according to at least one preset reference image resolution; wherein the first image is an image into which watermark information is to be embedded; scaling the first image according to the reference image resolution corresponding to the first image to obtain a second image; wherein the resolution of the second image is the same as the resolution of a reference image corresponding to the first image; embedding watermark information into thefrequency domain coefficient of the second image; performing inverse transformation processing on the frequency domain coefficient of the second image to obtain a second image embedded with watermarkinformation; and zooming the second image embedded with the watermark information to obtain an image with the same resolution as the first image. The scaling attack resistance of the watermark is improved.

Description

technical field [0001] The present application relates to digital watermark technology, in particular to a watermark embedding method, device, electronic equipment and storage equipment. The present application also relates to a watermark extraction method, device, electronic equipment and storage equipment. Background technique [0002] Today, people can conveniently transmit digital information to all parts of the world with the help of electronic devices such as computers and scanners. But the subsequent side effect is that the transmission of data files through the network makes it possible for malicious people to copy and disseminate copyrighted content without the permission of the owner of the work. Therefore, how to implement effective copyright protection, traceability and copyright protection in the network environment Information security means become an imminent reality. Watermark technology is an effective technical means to solve the above problems. The anti...

Claims

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Application Information

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IPC IPC(8): G06T1/00
CPCG06T1/0057G06T2201/0052
Inventor 刘永亮田冬陆哲明
Owner ZHEJIANG UNIV