首先:我看下面的代碼只是知道大概的原理核心算法還是不太清楚~~有清楚的麻煩回復下謝謝咯咯
--這也是看Msdn就是把在一個圖片上隱藏數據

using?System;
using?System.Drawing;
using?System.Collections;
using?System.ComponentModel;
using?System.Windows.Forms;
using?System.Data;

using?System.Text;?

namespace?Steganography
{
????/**////?<summary>
????///?Summary?description?for?SteganographyForm.
????///?</summary>
????public?class?SteganographyForm?:?System.Windows.Forms.Form
????{
????????private?System.Windows.Forms.Button?buttonHideMessage;
????????private?System.Windows.Forms.Panel?panelOriginalImage;
????????private?System.Windows.Forms.TextBox?textBoxOriginalMessage;
????????private?System.Windows.Forms.Panel?panelModifiedImage;
????????private?System.Windows.Forms.GroupBox?groupBox1;
????????private?System.Windows.Forms.GroupBox?groupBox3;
????????private?System.Windows.Forms.GroupBox?groupBox4;
????????private?System.Windows.Forms.Button?buttonExtractMessage;
????????private?System.Windows.Forms.TextBox?textBoxExtractedlMessage;
????????private?System.Windows.Forms.GroupBox?groupBox2;

????????/**////?<summary>
????????///?Required?designer?variable.
????????///?</summary>
????????private?System.ComponentModel.Container?components?=?null;

????????public?SteganographyForm()
????????{
????????????//
????????????//?Required?for?Windows?Form?Designer?support
????????????//
????????????InitializeComponent();

????????????//
????????????//?TODO:?Add?any?constructor?code?after?InitializeComponent?call
????????????//
????????????try
????????????{
????????????????//load?original?bitmap?from?a?file
????????????????bitmapOriginal?=?(Bitmap)Bitmap.FromFile(
????????????????????@"..\..\katie_plaintext.jpg");

????????????????//center?to?screen
????????????????this.CenterToScreen(?);
????????????}
????????????catch?(Exception?ex)
????????????{
????????????????MessageBox.Show(
????????????????????"Error?loading?image.?"?+?
????????????????????ex.Message?);
????????????}
????????}

????????/**////?<summary>
????????///?Clean?up?any?resources?being?used.
????????///?</summary>
????????protected?override?void?Dispose(?bool?disposing?)
????????{
????????????if(?disposing?)
????????????{
????????????????if?(components?!=?null)?
????????????????{
????????????????????components.Dispose();
????????????????}
????????????}
????????????base.Dispose(?disposing?);
????????}

????????Windows?Form?Designer?generated?code#region?Windows?Form?Designer?generated?code
????????/**////?<summary>
????????///?Required?method?for?Designer?support?-?do?not?modify
????????///?the?contents?of?this?method?with?the?code?editor.
????????///?</summary>
????????private?void?InitializeComponent()
????????{
????????????this.buttonHideMessage?=?new?System.Windows.Forms.Button();
????????????this.panelOriginalImage?=?new?System.Windows.Forms.Panel();
????????????this.textBoxOriginalMessage?=?new?System.Windows.Forms.TextBox();
????????????this.panelModifiedImage?=?new?System.Windows.Forms.Panel();
????????????this.groupBox1?=?new?System.Windows.Forms.GroupBox();
????????????this.groupBox3?=?new?System.Windows.Forms.GroupBox();
????????????this.groupBox4?=?new?System.Windows.Forms.GroupBox();
????????????this.buttonExtractMessage?=?new?System.Windows.Forms.Button();
????????????this.textBoxExtractedlMessage?=?new?System.Windows.Forms.TextBox();
????????????this.groupBox2?=?new?System.Windows.Forms.GroupBox();
????????????this.SuspendLayout();
????????????//?
????????????//?buttonHideMessage
????????????//?
????????????this.buttonHideMessage.Location?=?new?System.Drawing.Point(10,?594);
????????????this.buttonHideMessage.Name?=?"buttonHideMessage";
????????????this.buttonHideMessage.Size?=?new?System.Drawing.Size(144,?25);
????????????this.buttonHideMessage.TabIndex?=?0;
????????????this.buttonHideMessage.Text?=?"Hide?Message";
????????????this.buttonHideMessage.Click?+=?new?System.EventHandler(this.buttonHideMessage_Click);
????????????//?
????????????//?panelOriginalImage
????????????//?
????????????this.panelOriginalImage.Location?=?new?System.Drawing.Point(19,?26);
????????????this.panelOriginalImage.Name?=?"panelOriginalImage";
????????????this.panelOriginalImage.Size?=?new?System.Drawing.Size(412,?521);
????????????this.panelOriginalImage.TabIndex?=?0;
????????????//?
????????????//?textBoxOriginalMessage
????????????//?
????????????this.textBoxOriginalMessage.Location?=?new?System.Drawing.Point(182,?594);
????????????this.textBoxOriginalMessage.Name?=?"textBoxOriginalMessage";
????????????this.textBoxOriginalMessage.Size?=?new?System.Drawing.Size(240,?21);
????????????this.textBoxOriginalMessage.TabIndex?=?1;
????????????//?
????????????//?panelModifiedImage
????????????//?
????????????this.panelModifiedImage.Location?=?new?System.Drawing.Point(461,?26);
????????????this.panelModifiedImage.Name?=?"panelModifiedImage";
????????????this.panelModifiedImage.Size?=?new?System.Drawing.Size(411,?521);
????????????this.panelModifiedImage.TabIndex?=?0;
????????????//?
????????????//?groupBox1
????????????//?
????????????this.groupBox1.Location?=?new?System.Drawing.Point(163,?569);
????????????this.groupBox1.Name?=?"groupBox1";
????????????this.groupBox1.Size?=?new?System.Drawing.Size(279,?60);
????????????this.groupBox1.TabIndex?=?3;
????????????this.groupBox1.TabStop?=?false;
????????????this.groupBox1.Text?=?"Original?Message";
????????????//?
????????????//?groupBox3
????????????//?
????????????this.groupBox3.Location?=?new?System.Drawing.Point(10,?9);
????????????this.groupBox3.Name?=?"groupBox3";
????????????this.groupBox3.Size?=?new?System.Drawing.Size(432,?551);
????????????this.groupBox3.TabIndex?=?3;
????????????this.groupBox3.TabStop?=?false;
????????????this.groupBox3.Text?=?"Original?Image";
????????????//?
????????????//?groupBox4
????????????//?
????????????this.groupBox4.Location?=?new?System.Drawing.Point(451,?9);
????????????this.groupBox4.Name?=?"groupBox4";
????????????this.groupBox4.Size?=?new?System.Drawing.Size(432,?551);
????????????this.groupBox4.TabIndex?=?3;
????????????this.groupBox4.TabStop?=?false;
????????????this.groupBox4.Text?=?"Modified?Image";
????????????//?
????????????//?buttonExtractMessage
????????????//?
????????????this.buttonExtractMessage.Location?=?new?System.Drawing.Point(451,?594);
????????????this.buttonExtractMessage.Name?=?"buttonExtractMessage";
????????????this.buttonExtractMessage.Size?=?new?System.Drawing.Size(144,?25);
????????????this.buttonExtractMessage.TabIndex?=?2;
????????????this.buttonExtractMessage.Text?=?"Extract?Message";
????????????this.buttonExtractMessage.Click?+=?new?System.EventHandler(this.buttonExtractMessage_Click);
????????????//?
????????????//?textBoxExtractedlMessage
????????????//?
????????????this.textBoxExtractedlMessage.Location?=?new?System.Drawing.Point(624,?594);
????????????this.textBoxExtractedlMessage.Name?=?"textBoxExtractedlMessage";
????????????this.textBoxExtractedlMessage.ReadOnly?=?true;
????????????this.textBoxExtractedlMessage.Size?=?new?System.Drawing.Size(240,?21);
????????????this.textBoxExtractedlMessage.TabIndex?=?3;
????????????//?
????????????//?groupBox2
????????????//?
????????????this.groupBox2.Location?=?new?System.Drawing.Point(605,?569);
????????????this.groupBox2.Name?=?"groupBox2";
????????????this.groupBox2.Size?=?new?System.Drawing.Size(278,?60);
????????????this.groupBox2.TabIndex?=?3;
????????????this.groupBox2.TabStop?=?false;
????????????this.groupBox2.Text?=?"Extractedl?Message";
????????????//?
????????????//?SteganographyForm
????????????//?
????????????this.AutoScaleBaseSize?=?new?System.Drawing.Size(6,?14);
????????????this.ClientSize?=?new?System.Drawing.Size(930,?672);
????????????this.Controls.Add(this.textBoxOriginalMessage);
????????????this.Controls.Add(this.buttonHideMessage);
????????????this.Controls.Add(this.panelModifiedImage);
????????????this.Controls.Add(this.groupBox1);
????????????this.Controls.Add(this.panelOriginalImage);
????????????this.Controls.Add(this.groupBox3);
????????????this.Controls.Add(this.groupBox4);
????????????this.Controls.Add(this.buttonExtractMessage);
????????????this.Controls.Add(this.textBoxExtractedlMessage);
????????????this.Controls.Add(this.groupBox2);
????????????this.Name?=?"SteganographyForm";
????????????this.Text?=?"Steganography";
????????????this.Paint?+=?new?System.Windows.Forms.PaintEventHandler(this.SteganographyForm_Paint);
????????????this.ResumeLayout(false);
????????????this.PerformLayout();

????????}
????????#endregion

????????/**////?<summary>
????????///?The?main?entry?point?for?the?application.
????????///?</summary>
????????[STAThread]
????????static?void?Main()?
????????{
????????????Application.Run(new?SteganographyForm());
????????}

????????private?void?SteganographyForm_Paint(
????????????object?sender,?
????????????System.Windows.Forms.PaintEventArgs?e)
????????{
????????????try
????????????{
????????????????//get?Graphics?object?for?painting?original
????????????????Graphics?gPanelOriginal?=?
????????????????????Graphics.FromHwnd(
????????????????????????panelOriginalImage.Handle);

????????????????//draw?original?bitmap?into?panel
????????????????gPanelOriginal.DrawImage(
????????????????????bitmapOriginal,?new?Point(0?,0));

????????????????//return?if?there?is?no?modified?image?yet
????????????????if?(bitmapModified==null)
????????????????????return;

????????????????//get?Graphics?object?for?painting?modified
????????????????Graphics?gPanelModified?=?
????????????????????Graphics.FromHwnd(
????????????????????????panelModifiedImage.Handle);

????????????????//draw?modified?bitmap?into?panel
????????????????gPanelModified.DrawImage(
????????????????????bitmapModified,?new?Point(0?,0));
????????????}
????????????catch?(Exception?ex)
????????????{
????????????????MessageBox.Show(
????????????????????"Error?drawing?image."?+
????????????????????ex.Message);
????????????????this.Close(?);
????????????}
????????}

????????private?void?buttonHideMessage_Click(
????????????object?sender,?System.EventArgs?e)
????????{
????????????try
????????????{
????????????????//show?wait?cursor
????????????????this.Cursor?=?Cursors.WaitCursor;

????????????????//start?off?with?copy?of?original?image
????????????????bitmapModified?=?new?Bitmap(
????????????????????bitmapOriginal,?
????????????????????bitmapOriginal.Width,?
????????????????????bitmapOriginal.Height);

????????????????//get?original?message?to?be?hidden
????????????????int?numberbytes?=?
????????????????????(byte)textBoxOriginalMessage.Text.Length;
????????????????byte[]?bytesOriginal?=?new?byte[numberbytes+1];
????????????????bytesOriginal[0]?=?(byte)numberbytes;
????????????????Encoding.UTF8.GetBytes(
????????????????????textBoxOriginalMessage.Text,
????????????????????0,
????????????????????textBoxOriginalMessage.Text.Length,
????????????????????bytesOriginal,
????????????????????1);

????????????????//set?bits?1,?2,?3?of?byte?into?LSB?red
????????????????//set?bits?4,?5,?6?of?byte?into?LSB?green
????????????????//set?bits?7?and?8?of?byte?into?LSB?blue
????????????????int?byteCount?=?0;//----一列一列搞定
????????????????for?(int?i=0;?i<bitmapOriginal.Width;?i++)
????????????????{
????????????????????for?(int?j=0;?j<bitmapOriginal.Height;?j++)
????????????????????{
????????????????????????if?(bytesOriginal.Length==byteCount)
????????????????????????????return;
????????????????????????//---返回當前循環的坐標點的顏色數據
????????????????????????Color?clrPixelOriginal?=?
????????????????????????????bitmapOriginal.GetPixel(i,?j);
????????????????????????//為基元整型類型、枚舉類型和?boolean?類型預定義了二元?|?運算符。對于基元整型類型和枚舉類型，|?計算操作數的按位“或”。
????????????????????????//--注意這里是對~~血跡之術-的實際應用中的變種
????????????????????????//--這里的算法還是不太清楚估計是-防止三元素重合成1點后產生的錯位--如果大大們知道麻煩告訴我下
????????????????????????byte?r?=?
????????????????????????????(byte)((clrPixelOriginal.R?&?~0x7)?|
????????????????????????????(bytesOriginal[byteCount]>>0)&0x7);
????????????????????????byte?g?=?
????????????????????????????(byte)((clrPixelOriginal.G?&?~0x7)?|
????????????????????????????(bytesOriginal[byteCount]>>3)&0x7);
????????????????????????byte?b?=?
????????????????????????????(byte)((clrPixelOriginal.B?&?~0x3)?|
????????????????????????????(bytesOriginal[byteCount]>>6)&0x3);
????????????????????????byteCount++;

????????????????????????//set?pixel?to?modified?color
????????????????????????bitmapModified.SetPixel(
????????????????????????????i,?j,?Color.FromArgb(r,?g,?b));
????????????????????}

???????????????????
????????????????}
????????????}
????????????catch?(Exception?ex)
????????????{
????????????????MessageBox.Show(
????????????????????"Error?hiding?message."?+
????????????????????ex.Message);
????????????}
????????????finally
????????????{
????????????????//show?normal?cursor
????????????????this.Cursor?=?Cursors.Arrow;

????????????????//repaint
????????????????Invalidate();
????????????}
????????}

????????private?void?buttonExtractMessage_Click(
????????????object?sender,?System.EventArgs?e)
????????{
????????????//get?bytes?of?message?from?modified?image
????????????byte[]?bytesExtracted?=?new?byte?[256+1];
????????????try
????????????{
????????????????//show?wait?cursor,?can?be?time-consuming
????????????????this.Cursor?=?Cursors.WaitCursor;
????????????????
????????????????//get?bits?1,?2,?3?of?byte?from?LSB?red
????????????????//get?bits?4,?5,?6?of?byte?from?LSB?green
????????????????//get?bits?7?and?8?of?byte?from?LSB?blue
????????????????int?byteCount?=?0;
????????????????for?(int?i=0;?i<bitmapModified.Width;?i++)
????????????????{
????????????????????for?(int?j=0;?j<bitmapModified.Height;?j++)
????????????????????{
????????????????????????if?(bytesExtracted.Length==byteCount)
????????????????????????????return;

????????????????????????Color?clrPixelModified?=?
????????????????????????????bitmapModified.GetPixel(i,?j);
????????????????????????byte?bits123?=?
????????????????????????????(byte)((clrPixelModified.R&0x7)<<0);
????????????????????????byte?bits456?=?(
????????????????????????????byte)((clrPixelModified.G&0x7)<<3);
????????????????????????byte?bits78??=?(
????????????????????????????byte)((clrPixelModified.B&0x3)<<6);
????????????????????
????????????????????????bytesExtracted[byteCount]?=?
????????????????????????????(byte)(bits78?|bits456?|?bits123);
????????????????????????byteCount++;
????????????????????}

????????????????}
????????????}
????????????catch?(Exception?ex)
????????????{
????????????????MessageBox.Show(
????????????????????"Error?extracting?message."?+
????????????????????ex.Message);
????????????}
????????????finally
????????????{
????????????????//show?normal?cursor
????????????????this.Cursor?=?Cursors.Arrow;

????????????????//get?number?of?bytes?from?start?of?array
????????????????int?numberbytes?=?bytesExtracted[0];

????????????????//get?remaining?bytes?in?array?into?string
????????????????textBoxExtractedlMessage.Text?=??
????????????????????Encoding.UTF8.GetString(
????????????????????bytesExtracted,
????????????????????1,
????????????????????numberbytes);
????????????}????????
????????}

????????//shared?private?fields
????????private?Bitmap?bitmapOriginal;
????????private?Bitmap?bitmapModified;
????}
}

轉載于:https://www.cnblogs.com/ajaxren/archive/2007/04/23/724489.html

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