A tactile digital watermark embedding and detecting method based on electrostatic force

A technology of digital watermarking and detection method, applied in the field of information security, can solve the problems of inconvenience to carry, large size of the device, separation and the like

Active Publication Date: 2019-04-09
JILIN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned force-tactile reproduction device can generate tactile perception on the order of several Newtons and simulate a variety of tactile sensations, but the tactile interface of this type of device is separated from the visual interface, making it difficult to reproduce complex and fine characteristic information, and the device is large in size and inconvenient to carry. Difficult to combine with existing multimedia terminal products

Method used

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  • A tactile digital watermark embedding and detecting method based on electrostatic force
  • A tactile digital watermark embedding and detecting method based on electrostatic force
  • A tactile digital watermark embedding and detecting method based on electrostatic force

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Embodiment Construction

[0106] Step 1: Generate tactile form digital watermark, (see figure 2 ) contains two parts: the original image edge texture haptic feature and the custom vector map texture haptic feature. The implementation steps are as follows:

[0107] A, generating original picture edge texture tactile features, including the following steps:

[0108] i) When the gray inverse value difference between two areas exceeds the limit value of the method used, it proves that there is an edge between them. First-order differentiation is one of the basic methods of edge detection, and many edge detection algorithms basically pass The commonly used methods include but are not limited to differential edge detection, Robert operator detection, Sobel operator detection, Prewitt operator detection, and Laplace operator detection; edge detection is performed on the original image to obtain the value of each pixel Edge amplitude P and edge direction θ, according to the edge amplitude P and edge directio...

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Abstract

The invention provides a tactile digital watermark embedding and detecting method based on electrostatic force, and belongs to the field of information security. The method includes: carrying out Edgedetection and texture extraction on an original picture and a user-defined vector diagram respectively; obtaining an original picture edge texture tactile feature and a user-defined vector diagram texture tactile feature through texture extraction, carrying out DES encryption fusion on the two features to obtain a tactile digital watermark, and embedding the tactile digital watermark into the original picture by using a quantitative index modulation algorithm; The method comprises the following steps: at a detection end, extracting a watermark, performing DES decryption separation on the watermark to obtain an original picture edge texture tactile feature and a user-defined vector diagram texture tactile feature, performing tactile modeling and rendering on the two parts respectively, re-superposing the two parts together, and inputting the two parts into an electrostatic force tactile terminal to realize tactile reproduction. According to the method, the digital watermark is embeddedand detected by additionally providing a tactile dimension, so that the anti-counterfeiting performance of the digital watermark is greatly improved, and the applicability and the safety of the watermark are enhanced.

Description

technical field [0001] The invention belongs to the field of information security, and in particular relates to a tactile form digital watermark embedding and detection method based on electrostatic force. Background technique [0002] Digital watermarking is widely used in the field of digital media copyright protection: as we all know, with the popularization of the Internet, piracy of digital works on the Internet is becoming increasingly rampant. Digital works can be widely copied without affecting the quality, which makes criminals tamper and disseminate digital works arbitrarily without the consent of the copyright owner, and even use them to illegally seek commercial benefits, seriously infringing copyright. [0003] On the other hand, digital watermarking technology can add special marking information to a variety of multimedia information. Digital watermarking must be able to uniquely represent the copyright owner of digital products, and has the characteristics of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00G06T7/13G06T7/42G06T7/44G06T7/45
CPCG06T1/0021G06T7/13G06T7/42G06T7/44G06T7/45G06T2207/20056G06T2207/20024G06T2201/0065
Inventor 温泉陈嗣通孙晓颖陈建刘国红
Owner JILIN UNIV
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