实验五图像处理综合实验new

1、所谓数字水印是向多媒体数据（如图像、声音、视频信号等）中添加某些数字信息以达到文件真伪鉴别、版权保护等功能。嵌入的水印信息隐藏于宿主文件中，不影响原始文件的可观性和完整性。LSB（LeastSignificant Bits）算法：将秘密信息嵌入到载体图像像素值的最低有效位，也称最不显著位，改变这一位置对载体图像的品质影响最小。一、 理论基础对空域的LSB做替换，用来替换LSB的序列就是需要加入的水印信息、水印的数字摘要或者由水印生成的伪随机序列。由于水印信息嵌入的位置是LSB，为了满足水印的不可见性，允许嵌入的水印强度不可能太高。然而针对空域的各种处理，如游程编码前的预处理，会对不显著分量进行

2、一定的压缩，所以LSB算法对这些操作很敏感。因此LSB算法最初是用于脆弱性水印的。二、 实现步骤嵌入过程主要分为三步：1、将原始图像的空域像素值由十进制转换到二进制表；2、用二进制水印信息中的每一比特信息替换与之相对应在第数据的最低有效位；3、将得到的含水印的二进制数据转换为十进制像素值，从而获得含水印的图像。三、核心代码/打开宿主图像void CWaterMarkDlg:OnOpenFile() / TODO: Add your control notification handler code hereCFileDialog dlg(TRUE, , NULL, OFN_HIDEREADON

3、LY | OFN_OVERWRITEPROMPT | OFN_ALLOWMULTISELECT, (*.bmp)|*.bmp|所有文件(*.*)|*.*|,AfxGetMainWnd();/读取图象的文件名CString filename;if(dlg.DoModal()=IDOK)POSITION pos = dlg.GetStartPosition();filename = dlg.GetNextPathName(pos);Bitmap2Data();/if(hwnd0!=NULL)hwnd0=NULL;if(hSrcDC0!=NULL)hSrcDC0=NULL;if(hDesDC0!=N

4、ULL)hDesDC0=NULL;hwnd0 = GetDlgItem(IDC_STATIC0);hDesDC0 = hwnd0-GetDC()-m_hDC;hSrcDC0 = CreateCompatibleDC(hDesDC0);filename=dlg.GetPathName();hBitmap0=(HBITMAP)LoadImage(AfxGetInstanceHandle(),filename,IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);GetObject(hBitmap0, sizeof BITMAP, &bm0);S

5、electObject(hSrcDC0, hBitmap0);hwnd0-GetClientRect(&rect0);:SetStretchBltMode(hDesDC0,COLORONCOLOR); :StretchBlt(hDesDC0, rect0.left, rect0.top, rect0.right, rect0.bottom, hSrcDC0, 0, 0, bm0.bmWidth, bm0.bmHeight,+SRCCOPY);show0=TRUE;SetTimer(NULL,50,0);GetDlgItem(IDC_BUTTON2)-EnableWindow(TRUE);els

6、e/*GetDlgItem(IDC_STATIC0)-MoveWidow(rect(0,0,bm.bmWidth,bm.bmHeight);hwnd-MoveWidow(rect(0,0,bm.bmWidth,bm.bmHeight);m_pic.SetBitmap(hBitmap);this-RedrawWindow();*/TRACE(错误);if(pEdit!=NULL)pEdit=NULL;r.left=35;r.top=rect0.bottom+2;r.right=200+r.left;r.bottom=r.top+20;pEdit=new CEdit;pEdit-Create(ES

7、_CENTER|WS_VISIBLE|ES_READONLY,r,this,1);CFont * cFont=new CFont;cFont-CreateFont(16,0,0,0,FW_SEMIBOLD,FALSE,FALSE,0, ANSI_CHARSET,OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,DEFAULT_QUALITY, DEFAULT_PITCH&FF_SWISS,Arial);pEdit-SetFont(cFont,TRUE);pEdit-SetWindowText(s2);/打开水印图像void CWaterMarkDlg:OnOpen

8、WaterMark() / TODO: Add your control notification handler code hereCFileDialog dlg1(TRUE,bmp,.bmp,OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT,位图文件(*.bmp)|*.bmp|JPEG 文件(*.jpg)|*.jpg|GIF文件(*.gif)|*.gif|);if(dlg1.DoModal()=IDOK)if(hwnd1!=NULL)hwnd1=NULL;if(hSrcDC1!=NULL)hSrcDC1=NULL;if(hDesDC1!=NULL)hDesDC1

9、=NULL;hwnd1 = GetDlgItem(IDC_STATIC1);hDesDC1 = hwnd1-GetDC()-m_hDC;hSrcDC1 = CreateCompatibleDC(hDesDC1);watermark=dlg1.GetPathName();hBitmap1=(HBITMAP)LoadImage(AfxGetInstanceHandle(),watermark,IMAGE_BITMAP,0,0,LR_LOADFROMFILE|LR_CREATEDIBSECTION);GetObject(hBitmap1, sizeof BITMAP, &bm1);SelectObj

10、ect(hSrcDC1, hBitmap1);hwnd1-GetClientRect(&rect1);:SetStretchBltMode(hDesDC1,COLORONCOLOR); :StretchBlt(hDesDC1, rect1.left, rect1.top, rect1.right, rect1.bottom, hSrcDC1, 0, 0, bm1.bmWidth, bm1.bmHeight,+SRCCOPY);show1=TRUE;if (bm0.bmHeight*bm0.bmWidth)EnableWindow(FALSE);Mark=TRUE;GetDlgItem(IDC_

11、BUTTON3)-EnableWindow(TRUE);/将宿主图象的转换为数据保存在二维数组m_tOriPixelArrayvoid CWaterMarkDlg:Bitmap2Data()int i,j;if(m_tOriPixelArray !=NULL)if(m_Ih!=0)for(i=0; im_Ih; i+)delete m_tOriPixelArrayi;elsefor(i=0; iOpen(filename);ImageWidth = m_dib-GetWidth();ImageHeight = m_dib-GetHeight();biBitCount = m_dib-GetBi

12、BitCount(); BYTE *colorTable;colorTable =(BYTE *) m_dib-m_pDibBits;int byteBitCount = m_dib-GetBiBitCount()/8;m_tOriPixelArray =new RGBQUAD*ImageHeight;for (int l=0;l=0; i-)for(j=0; jImageWidth; j+)m_tOriPixelArrayij.rgbBlue =colorTablecount+;m_tOriPixelArrayij.rgbGreen=colorTablecount+;m_tOriPixelA

13、rrayij.rgbRed =colorTablecount+;m_tOriPixelArrayij.rgbReserved = 0;count += byteBitCount-3;num+=1;count += (4-(ImageWidth*byteBitCount)%4)%4;show2=TRUE;/将水印图象的转换为数据保存在二维数组m_watermarkdatavoid CWaterMarkDlg:WaterBitmap2Data()int i,j;if(m_watermarkdata !=NULL)if(m_Wh!=0)for(i=0; iOpen(watermark);if(m_d

14、ib1-GetBiBitCount()8) MessageBox(目前仅对8位的水印信息有效);WaterWidth=m_dib1-GetWidth();WaterHeight=m_dib1-GetHeight();biBitCount1 = m_dib1-GetBiBitCount();BYTE *colorTable;colorTable =(BYTE *) m_dib1-m_pDibBits;int byteBitCount = m_dib1-GetBiBitCount()/8;m_watermarkdata =new RGBQUAD*WaterHeight;for (int l=0;l

15、=0; i-)for(j=0; jWaterWidth; j+)m_watermarkdataij.rgbBlue = colorTablecount+;m_watermarkdataij.rgbGreen = colorTablecount+;m_watermarkdataij.rgbRed = colorTablecount+;m_watermarkdataij.rgbReserved = 0;count += byteBitCount-3;num+=1; count += (4-(WaterWidth*byteBitCount)%4)%4;void CWaterMarkDlg:OnWat

16、erEmbed() / TODO: Add your control notification handler code hereRGBQUAD *m_copymater;/定义一个水印信息的数据副本m_copymater = new RGBQUAD WaterHeight*WaterWidth;int i,j;int count=0;BYTE m_r,m_b;if(m_waterEmbed !=NULL)/m_waterEmbed是水印嵌入后的位图数据全局变量if(m_Ih!=0)for(int l =0;lm_Ih;l+)delete m_waterEmbedl;/?m_waterEmbe

17、d = new RGBQUAD*ImageHeight;for(i=0;iImageHeight;i+)m_waterEmbedi = new RGBQUAD ImageWidth;for(i=0;iImageHeight;i+)/将原来的图象的数据复制到m_waterEmbed里for(j=0;jImageWidth;j+)m_waterEmbedij=m_tOriPixelArrayij;/将水印信息的数据复制到一维数组m_copymater水印信息的数据副本里for(i=0;iWaterHeight;i+) for(j=0;jWaterWidth;j+)m_copymateri*Wate

18、rHeight+j=m_watermarkdataij;count+;number=count;/记录嵌入的点数/int k=0;if (biBitCount=24)/Operate_Byte()嵌入水印信息位操作for(i=0;i0;i+)for(j=0;j0;j+,count-)m_r=m_waterEmbedij.rgbRed;m_b=m_waterEmbedij.rgbBlue;BYTE &a=m_r;BYTE &b=m_b;BYTE c=m_copymateri*ImageHeight+j.rgbGreen;Operate_Byte(a,b,c);m_waterEmbedij.rgbRed=m_r;m_waterEmbedij.rgbBlue=m_b;/TRACE(n%d,c);k+;PutInWaterMessage();/else return;CDC *dc=GetDC();/将象素打印出来RECT m_rect;float w,h,p,q;GetDlgItem(IDC_STATIC2)-GetClientRect(&m_rect);if(m_rect.rightImageWid