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Research on Information Hiding Techniques Based on Screen Coding

Author: XuJun
Tutor: SunYanPeng
School:
Course: Signal and Information Processing
Keywords: Information Hiding Screen Coding Mathematical Morphology ImageProcessing Component Technology
CLC: TP309
Type: Master's thesis
Year: 2013
Downloads: 52
Quote: 0
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Abstract


By controling the arrangement and distribution the screen dot when it is printed，thescreen coding information-hiding technology based on visual characteristics achieves the goalthat is information can be described and hiding easily. The advantages are as follows: moreinformation, high robustness, low cost and so on. In recent years, the use of screen coding hasbecome more and more wider. the main works are as follows:1. By use of the Matlab language, the system model, which includesgeting information,encryption, the screen coding background embedded, image pre-processing, deciphering,storage retrieval and so on. The result show the effectiveness of the proposed method, thehigh recovery rate statisticsed by many test proves the practicability of this method.2. Mathematical morphology is introduced in the process of image pre-processing,themain work are as follows: first of all, filtering is achieved through the use open and closeoperation; then by use of the corrode operation,the information bits are reinforced toreducde the computation; by use of the dilation operation,the information bits are amplifiedwith the purpose of eliminate the influence of inclination of the paper; In the end, discusseliminate the influence of plaintext in the paper by use of the open and close operation.3. By use of the ActiveX control technology, the Microsoft Word server program iscalled by Matlab as the COM client-side. Important information of the one Word document isextracted,such as font,font-size,paragraph. In the part of screen coding recognition, a newword document is set up through the use of same technology, the paper can be recoverd.The technologies which are mathematical morphology and the Microsoft Word serverprogram is called by Matlab is introduced to the screen coding information hiding,so itincrease the method of screen coding, enhance the recognition efficiency,it will be of greatimportance in screen coding and information hiding.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality
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