进行识别前图像预处理.docx

1、进行识别前图像预处理进行识别前图像预处理 /BP神经网络字符识别函数定义 #include dibapi.h#include <iostream>#include <deque>#include <math.h>using namespace std;typedef deque<CRect> CRectLink;typedef deque<HDIB> HDIBLink;/声明一些必要的全局变量int w_sample=8;int h_sample=16;bool fileloaded;bool gyhinfoinput;bool gy

2、hfinished;int digicount;int m_lianXuShu;CRectLink m_charRectCopy;CRectLink m_charRect;HDIBLink m_dibRect;HDIBLink m_dibRectCopy;HDIB m_hDIB;CString strPathName;CString strPathNameSave;/*function declaration*/清楚屏幕void ClearAll(CDC* pDC);/在屏幕上显示位图void DisplayDIB(CDC* pDC,HDIB hDIB);/对分割后的位图进行尺寸标准归一化vo

3、id StdDIBbyRect(HDIB hDIB, int tarWidth, int tarHeight);/整体斜率调整void SlopeAdjust(HDIB hDIB);/去除离散噪声点void RemoveScatterNoise(HDIB hDIB);/梯度锐化void GradientSharp(HDIB hDIB);/画框void DrawFrame(CDC* pDC,HDIB hDIB, CRectLink charRect,unsigned int linewidth,COLORREF color);/将灰度图二值化void ConvertGrayToWhiteBlac

4、k(HDIB hDIB);/将256色位图转为灰度图void Convert256toGray(HDIB hDIB);/细化void Thinning(HDIB hDIB);/对位图进行分割.返回一个存储着每块分割区域的链表CRectLink CharSegment(HANDLE hDIB);/紧缩、重排调整HDIB AutoAlign(HDIB hDIB);/判断是否是离散噪声点bool DeleteScaterJudge(LPSTR lpDIBBits,WORD lLineBytes, LPBYTE lplab, int lWidth, int lHeight, int x, int y,

5、 CPoint lab, int lianXuShu);/对图像进行模板操作HDIB Template(HDIB hDIB,double * tem ,int tem_w,int tem_h,double xishu);/对图像进行中值滤波HDIB MidFilter(HDIB hDIB,int tem_w,int tem_h);/对图像进行直方图均衡void Equalize(HDIB hDIB);/*implementation*/* *函数名称：DisplayDIB参数： CDC* pDC -指向当前设备上下文（Divice Context）的指针 HDIB hDIB -要显示的位图的句

6、柄*/void DisplayDIB(CDC* pDC,HDIB hDIB) BYTE* lpDIB=(BYTE*):GlobalLock(HGLOBAL)hDIB); / 获取DIB宽度和高度 int cxDIB = :DIBWidth(char*) lpDIB); int cyDIB = :DIBHeight(char*)lpDIB); CRect rcDIB,rcDest; rcDIB.top = rcDIB.left = 0; rcDIB.right = cxDIB; rcDIB.bottom = cyDIB; /设置目标客户区输出大小尺寸 rcDest = rcDIB; /CDC*

7、pDC=GetDC(); ClearAll(pDC); /在客户区显示图像 /for(int ii=0;ii<10;ii+) :PaintDIB(pDC->m_hDC,rcDest,hDIB,rcDIB,NULL); :GlobalUnlock(HGLOBAL)hDIB);void ClearAll(CDC *pDC) CRect rect; /GetClientRect(&rect); rect.left =0;rect.top =0;rect.right =2000;rect.bottom =1000; CPen pen; pen.CreatePen (PS_SOLID

8、,1,RGB(255,255,255); pDC->SelectObject (&pen); pDC->Rectangle (&rect); :DeleteObject (pen);/* 函数名称：* AutoAlign()* 参数：* HDIB hDIB 原图像的句柄* 返回值 * HDIB 紧缩排列后的新图像的句柄* 功能：* 将经过了标准化处理的字符进行规整的排列，以方便下一步的处理* 说明：* 紧缩排列的操作必须在标准化操作之后进行*/HDIB AutoAlign(HDIB hDIB) /指向图像的指针 BYTE* lpDIB=(BYTE*):GlobalL

9、ock (HGLOBAL)hDIB); /指向象素起始位置的指针 BYTE* lpDIBBits=(BYTE*):FindDIBBits (char*)lpDIB); /指向象素的指针 BYTE* lpSrc; /获取图像的宽度 LONG lWidth=:DIBWidth (char*)lpDIB); /获取图像的高度 LONG lHeight=:DIBHeight (char*)lpDIB); /获取标准化的宽度 int w=m_charRect.front ().Width() ; /获取标准化的高度 int h=m_charRect.front ().Height() ; /建立一个新的

10、图像正好能够将标准化的字符并排放置 HDIB hNewDIB=:NewDIB (digicount*w,h,8); /指向新的图像的指针 BYTE* lpNewDIB=(BYTE*) :GlobalLock(HGLOBAL)hNewDIB); /指向象素起始位置的指针 BYTE* lpNewDIBBits=(BYTE*):FindDIBBits(char*)lpNewDIB); /指向象素的指针 BYTE* lpDst=lpNewDIBBits; /计算原图像每行的字节数 LONG lLineBytes=(lWidth+3)/4*4; /计算新图像每行的字节数 LONG lLineBytesn

11、ew =(digicount*w+3)/4*4; /将新的图像初始化为白色 memset(lpDst,(BYTE)255,lLineBytesnew * h); /映射操作的坐标变量 int i_src,j_src; /循环变量 int i,j; /统计字符个数的变量 int counts=0; /存放位置信息的结构体 CRect rect,rectnew; /清空一个新的链表来存放新的字符位置信息 m_charRectCopy.clear (); /从头至尾逐个扫描原链表的各个结点 while(!m_charRect.empty() ) /从表头上得到一个矩形框 rect=m_charRec

12、t.front (); /将这个矩形框从链表上删除 m_charRect.pop_front (); /计算新的矩形框的位置信息 /左边界 rectnew.left =counts*w; /右边界 rectnew.right =(counts+1)*w; /上边界 rectnew.top =0; /下边界 rectnew.bottom =h; /将获得的新的矩形框插入到新的链表中 m_charRectCopy.push_back (rectnew); /将原矩形框内的象素映射到新的矩形框中 for(i=0;i<h;i+) for(j=counts*w;j<(counts+1)*w;

13、j+) /计算映射坐标 i_src=rect.top +i; j_src=rect.left +j-counts*w; /进行象素的映射 lpSrc=(BYTE *)lpDIBBits + lLineBytes * i_src + j_src; lpDst=(BYTE *)lpNewDIBBits + lLineBytesnew * i + j; *lpDst=*lpSrc; /字符个数加1 counts+; /将获得的新的链表复制到原链表中，以方便下一次的调用 m_charRect=m_charRectCopy; /解除锁定 :GlobalUnlock (hDIB); :GlobalUnlo

14、ck (hNewDIB); return hNewDIB;/* 函数名称：* ThinnerHilditch* 参数：* void* image 二值化图像矩阵前景色为1背景色为0* unsigned longlx 图像的宽度* unsigned longly 图像的高度* 返回值* 无*函数功能：* 对输入的图像进行细化，输出细化后的图像*/void ThinnerHilditch(void *image, unsigned long lx, unsigned long ly) char *f, *g; char n10; unsigned int counter; short k, sho

15、ri, xx, nrn; unsigned long i, j; long kk, kk11, kk12, kk13, kk21, kk22, kk23, kk31, kk32, kk33, size; size = (long)lx * (long)ly; g = (char *)malloc(size); if(g = NULL) / printf(error in allocating memory!n); return; f = (char *)image; for(i=0; i<lx; i+) for(j=0; j<ly; j+) kk=i*ly+j; if(fkk!=0

16、) fkk=1; gkk=fkk; counter = 1; do counter+; shori = 0; for(i=0; i<lx; i+) for(j=0; j<ly; j+) kk = i*ly+j; if(fkk<0) fkk = 0; gkk= fkk; for(i=1; i<lx-1; i+) for(j=1; j<ly-1; j+) kk=i*ly+j; if(fkk!=1) continue; kk11 = (i-1)*ly+j-1; kk12 = kk11 + 1; kk13 = kk12 + 1; kk21 = i*ly+j-1; kk22

17、 = kk21 + 1; kk23 = kk22 + 1; kk31 = (i+1)*ly+j-1; kk32 = kk31 + 1; kk33 = kk32 + 1; if(gkk12&&gkk21&&gkk23&&gkk32)!=0) continue; nrn = gkk11 + gkk12 + gkk13 + gkk21 + gkk23 + gkk31 + gkk32 + gkk33; if(nrn <= 1) fkk22 = 2; continue; n4 = fkk11; n3 = fkk12; n2 = fkk13; n5 =

18、 fkk21; n1 = fkk23; n6 = fkk31; n7 = fkk32; n8 = fkk33; n9 = n1; xx = 0; for(k=1; k<8; k=k+2) if(!nk)&&(nk+1|nk+2) xx+; if(xx!=1) fkk22 = 2; continue; if(fkk12 = -1) fkk12 = 0; n3 = 0; xx = 0; for(k=1; k<8; k=k+2) if(!nk)&&(nk+1|nk+2) xx+; if(xx != 1) fkk12 = -1; continue; fkk1

19、2 = -1; n3 = -1; if(fkk21!=-1) fkk22 = -1; shori = 1; continue; fkk21 = 0; n5 = 0; xx = 0; for(k=1; k<8; k=k+2) if(!nk)&&(nk+1|nk+2) xx+; if(xx = 1) fkk21 = -1; fkk22 = -1; shori =1; else fkk21 = -1; while(shori); free(g);/* 函数名称：* ThinnerRosenfeld* 参数：* void* image 二值化图像矩阵前景色为1背景色为0* uns

20、igned longlx 图像的宽度* unsigned longly 图像的高度* 返回值* 无*函数功能：* 对输入的图像进行细化，输出细化后的图像*/void ThinnerRosenfeld(void *image, unsigned long lx, unsigned long ly) char *f, *g; char n10; char a5 = 0, -1, 1, 0, 0; char b5 = 0, 0, 0, 1, -1; char nrnd, cond, n48, n26, n24, n46, n68, n82, n123, n345, n567, n781; short

21、 k, shori; unsigned long i, j; long ii, jj, kk, kk1, kk2, kk3, size; size = (long)lx * (long)ly; g = (char *)malloc(size); if(g=NULL) printf(error in alocating mmeory!n); return; f = (char *)image; for(kk=0l; kk<size; kk+) gkk = fkk; do shori = 0; for(k=1; k<=4; k+) for(i=1; i<lx-1; i+) ii

22、= i + ak; for(j=1; j<ly-1; j+) kk = i*ly + j; if(!fkk) continue; jj = j + bk; kk1 = ii*ly + jj; if(fkk1) continue; kk1 = kk - ly -1; kk2 = kk1 + 1; kk3 = kk2 + 1; n3 = fkk1; n2 = fkk2; n1 = fkk3; kk1 = kk - 1; kk3 = kk + 1; n4 = fkk1; n8 = fkk3; kk1 = kk + ly - 1; kk2 = kk1 + 1; kk3 = kk2 + 1; n5 = fkk1; n6 = fkk2; n7 = fkk3; nrnd = n1 + n2 + n3 + n4 +n5 + n6 + n7 + n8; if(nrnd<=1) continue; cond = 0; n48 = n4 + n8; n26 = n2 + n6; n24 = n2 + n4; n46 = n4 + n6; n68 = n6 + n8; n82 = n8 + n2; n123 = n1 + n2 + n3; n345 = n3 + n4 + n5; n567 = n5 + n6 + n7; n781 = n7 + n8 + n1;