基于一階貝塞爾曲線的信息隱藏軟件的設(shè)計(jì)

論文字?jǐn)?shù):12139,頁數(shù):23

摘  要
隨著信息技術(shù)的飛速發(fā)展，網(wǎng)絡(luò)已經(jīng)影響到社會(huì)的政治、經(jīng)濟(jì)、文化、軍事等各個(gè)方面，已成為全球信息基礎(chǔ)設(shè)施的主要組成部分。但是，網(wǎng)絡(luò)作為一把雙刃劍，在加速人類信息化社會(huì)的進(jìn)程中，也給保障信息安全帶來了極大的挑戰(zhàn)。作為信息安全的一個(gè)重要分支，信息隱藏技術(shù)由于具有較好的隱蔽性和易操做性，而逐漸成為信息安全領(lǐng)域的研究熱點(diǎn)之一。
本文首先對(duì)圖像空域的應(yīng)用進(jìn)行了分析研究，重點(diǎn)探討了基于一階貝塞爾曲線的信息融合算法，并在理論上證明了該算法的可用性；其次對(duì)該算法的相應(yīng)部分進(jìn)行了改進(jìn)，并編程實(shí)現(xiàn)了載體圖像文件對(duì)信息的隱藏和恢復(fù)功能；最后通過測(cè)試與分析，說明本設(shè)計(jì)所開發(fā)的軟件可以無損地對(duì)數(shù)據(jù)流信息進(jìn)行隱藏和恢復(fù)；由于此算法合理的設(shè)計(jì)，最終達(dá)到一幅作為載體的位圖文件可以隱藏大約占其3/8容量的明文信息，表明該軟件具有一定的實(shí)用價(jià)值。

關(guān)鍵詞：信息隱藏技術(shù)；圖像空域；一階貝塞爾曲線；隱藏比例；位圖

Design of Information Hiding Software Based on One-step Bézier Curve
Abstract
Along with the rapid development of information technology, the network already affects society's politics, economical, cultural, military and social life and so on, and it has become the main constituent of the global information infrastructure. But the network takes as a “double-edged sword”, in humanity information society's advancement, has brought the enormous challenge for the safeguard information security. As an important branch of information security, information hiding technology has a better hiding and operating, gradually becomes the focus of information security domain.
At first, this paper analyzes and researches the application of the picture aerial region, discusses with emphasis based on one-step Bézier curve, and proves the usability of this algorithm; Next this algorithm is improved partly, the programming of the information hiding and restore-function are realized; Finally through the test and the analysis, the software can carry on the hide and information and restoration to the data stream information; As a result of this algorithm reasonable design, as an BMP file of carrier, it can hide approximately its 3/8 capacity of plain information, which shows this software has some practical values.

Key words: Information Hiding Technology; Aerial Region of Picture; One-step Bézier curve; Hiding Proportion; BMP

目  錄
論文總頁數(shù)：19頁
1 引言 1
1.1 課題背景 1
1.2 國(guó)內(nèi)外研究現(xiàn)狀 1
1.3 本課題研究的意義 1
1.4 本課題的主要工作 2
2 理論基礎(chǔ) 2
2.1 空域研究——數(shù)字圖像加強(qiáng) 2
2.2 BMP圖像文件的分析 3
2.3 貝塞爾曲線 4
2.4 基于彩色靜止數(shù)字圖像的信息隱藏算法 5
2.5 一階貝塞爾曲線對(duì)圖像的隱藏與恢復(fù) 6
2.6 算法的改進(jìn) 6
2.7 算法可靠性分析及關(guān)鍵參數(shù)的選取 7
3 基于一階貝塞爾曲線的信息隱藏軟件的需求分析 8
3.1 任務(wù)概述 8
3.2 需求規(guī)定 8
3.3 需求描述 8
4 基于一階貝塞爾曲線的信息隱藏軟件的設(shè)計(jì)方案 9
4.1 對(duì)明文組幀 9
4.2 嵌入算法 9
4.3 恢復(fù)算法 11
5 基于一階貝塞爾曲線的信息隱藏軟件的實(shí)現(xiàn) 12
5.1 基本步驟 12
5.2 輔助程序段 13
5.3 錯(cuò)誤判斷 14
6 運(yùn)行測(cè)試與分析 14
6.1 軟件演示 14
6.2 測(cè)試與分析 16
結(jié)    論 16
參考文獻(xiàn) 17
致    謝 18
聲    明 19