【数字图像处理】图像增强-空域-空间滤波模板类 & 算子总结（MFC & 滤镜）
模板类算子总结模板类
空间滤波就是在原图像上做卷积运算，这里给出一个改进过的模板类。
BOOL WINAPI Template(LPSTR lpDIBBits, LONG lWidth, LONG lHeight, int iTempH, int iTempW, int iTempMX, int iTempMY, FLOAT* fpArray, FLOAT fCoef, LONG lLineBytes, FLOAT thre);//最后在传统模板类加上 float 阈值，使模板类可以完成反色
函数库.cpp
/*************************************************************************** 函数名称：* Template()** 参数:* LPSTR lpDIBBits - 指向源DIB图像指针* LONG lWidth - 源图像宽度（象素数）* LONG lHeight- 源图像高度（象素数）* int iTempH- 模板的高度* int iTempW- 模板的宽度* int iTempMX- 模板的中心元素X坐标 ( < iTempW - 1)* int iTempMY- 模板的中心元素Y坐标 ( < iTempH - 1)* FLOAT * fpArray- 指向模板数组的指针* FLOAT fCoef- 模板系数** 返回值:* BOOL- 成功返回TRUE，否则返回FALSE。** 说明:* 该函数用指定的模板（任意大小）来对图像进行操作，参数iTempH指定模板* 的高度，参数iTempW指定模板的宽度，参数iTempMX和iTempMY指定模板的中心* 元素坐标，参数fpArray指定模板元素，fCoef指定系数。*************************************************************************/BOOL WINAPI Template(LPSTR lpDIBBits, LONG lWidth, LONG lHeight, int iTempH, int iTempW, int iTempMX, int iTempMY, FLOAT* fpArray, FLOAT fCoef,LONG lLineBytes, FLOAT thre){// 指向复制图像的指针LPSTR lpNewDIBBits;HLOCAL hNewDIBBits;// 指向源图像的指针unsigned char* lpSrc;// 指向要复制区域的指针unsigned char* lpDst;// 循环变量LONG i;LONG j;LONG k;LONG l;// 计算结果FLOAT fResult;// 暂时分配内存，以保存新图像hNewDIBBits = LocalAlloc(LHND, lLineBytes * lHeight);// 判断是否内存分配失败if (hNewDIBBits == NULL){// 内存分配失败return FALSE;}// 锁定内存lpNewDIBBits = (char*)LocalLock(hNewDIBBits);// 初始化图像为原始图像memcpy(lpNewDIBBits, lpDIBBits, lLineBytes * lHeight);// 行(除去边缘几行)for (i = iTempMY; i < lHeight - iTempH + iTempMY + 1; i++){// 列(除去边缘几列)for (j = iTempMX; j < lWidth - iTempW + iTempMX + 1; j++){// 指向新DIB第i行，第j个象素的指针lpDst = (unsigned char*)lpNewDIBBits + lLineBytes * (lHeight - 1 - i) + j;fResult = 0;// 计算for (k = 0; k < iTempH; k++){for (l = 0; l < iTempW; l++){// 指向DIB第i - iTempMY + -0.1行，第j - iTempMX + l个象素的指针lpSrc = (unsigned char*)lpDIBBits + lLineBytes * (lHeight - 1 - i + iTempMY - k) + j - iTempMX + l;// 保存象素值fResult += (*lpSrc) * fpArray[k * iTempW + l];}}// 乘上系数fResult *= fCoef;fResult += thre;// 取绝对值fResult = (FLOAT)fabs(fResult);// 判断是否超过255if (fResult > 255){// 直接赋值为255*lpDst = 255;}else{// 赋值*lpDst = (unsigned char)(fResult + 0.5);}}}// 复制变换后的图像memcpy(lpDIBBits, lpNewDIBBits, lLineBytes * lHeight);// 释放内存LocalUnlock(hNewDIBBits);LocalFree(hNewDIBBits);// 返回return TRUE;}
xxxxview.cpp
void CImgView::Onfilter()//滤镜操作{CImgDoc* pDoc = GetDocument();long lSrcLineBytes;//图象每行的字节数long lSrcWidth;//图象的宽度和高度long lSrcHeight;int lpSrcBitCount; //图像的位深LPSTRlpSrcDib;//指向源图象的指针LPSTRlpSrcStartBits;//指向源像素的指针lpSrcDib = (LPSTR) ::GlobalLock((HGLOBAL)pDoc->GetHObject());// 锁定DIBif (!lpSrcDib) return;if (pDoc->m_dib.GetColorNum(lpSrcDib) != 256)// 判断是否是8-bpp位图{AfxMessageBox(L"对不起，不是256色位图！");// 警告::GlobalUnlock((HGLOBAL)pDoc->GetHObject());// 解除锁定return;//返回}//判断是否是8-bpp位图,不是则返回lpSrcStartBits = pDoc->m_dib.GetBits(lpSrcDib);// 找到DIB图象像素起始位置lSrcWidth = pDoc->m_dib.GetWidth(lpSrcDib);// 获取图象的宽度lSrcHeight = pDoc->m_dib.GetHeight(lpSrcDib);// 获取图象的高度lpSrcBitCount = pDoc->m_dib.GetBitCount(lpSrcDib);//获取图像位深lSrcLineBytes = pDoc->m_dib.GetReqByteWidth(lSrcWidth * 8);// 计算图象每行的字节数/int iTempH;// 模板高度int iTempW;// 模板宽度FLOAT fTempC; // 模板系数int iTempMX;// 模板中心元素X坐标int iTempMY;// 模板中心元素Y坐标FLOAT aValue[9]; // 模板元素数组float thre;CDlgFilter Dlgfil;Dlgfil.lSrcHeight = lSrcHeight;Dlgfil.lSrcWidth = lSrcWidth;Dlgfil.lpSrcStartBits = lpSrcStartBits;Dlgfil.Doc = pDoc;Dlgfil.lSrcLineBytes = lSrcLineBytes;Dlgfil.lpSrcDib = lpSrcDib;if (Dlgfil.DoModal() != IDOK){return;}aValue[0] = Dlgfil.Num[0];aValue[1] = Dlgfil.Num[1];aValue[2] = Dlgfil.Num[2];aValue[3] = Dlgfil.Num[3];aValue[4] = Dlgfil.Num[4];aValue[5] = Dlgfil.Num[5];aValue[6] = Dlgfil.Num[6];aValue[7] = Dlgfil.Num[7];aValue[8] = Dlgfil.Num[8];// 设定平移量（3*3）iTempH = 3;iTempW = 3;//这里用的都是3x3的模板，直接赋值为3了iTempMX = Dlgfil.m_iTempMX;iTempMY = Dlgfil.m_iTempMY;fTempC = Dlgfil.m_fTempC;thre = Dlgfil.Thre;delete Dlgfil;// 更改光标形状BeginWaitCursor();// 调用Template()函数if (Template(lpSrcStartBits, lSrcWidth, lSrcHeight, iTempH, iTempW, iTempMX, iTempMY, aValue, fTempC, lSrcLineBytes,thre)){pDoc->SetModifiedFlag(TRUE);// 设置脏标记pDoc->UpdateAllViews(NULL);// 更新视图}else{// 提示用户AfxMessageBox(L"分配内存失败！");}// 解除锁定::GlobalUnlock((HGLOBAL)pDoc->GetHObject());// 恢复光标EndWaitCursor();}
算子总结
m_iTempH ：模板的高度
m_iTempW ：模板的宽度
m_iTempMX ：模板中心坐标x
m_iTempMY ：模板中心坐标y
m_fTempC ：模板系数
Thre ：为了把反色统一进模板类单独加的，反色是255，其他均为0
高斯模糊
m_iTempH = 3;
m_iTempW = 3;
m_iTempMX = 1;
m_iTempMY = 1;
m_fTempC = (FLOAT)(1.0 / 16.0);
Thre =0;
Num[0] = 1.0;
Num[1] = 2.0;
Num[2] = 1.0;
Num[3] = 2.0;
Num[4] = 4.0;
Num[5] = 2.0;
Num[6] = 1.0;
Num[7] = 2.0;
Num[8] = 1.0;
均值模糊
m_iTempH = 3;
m_iTempW = 3;
m_iTempMX = 1;
m_iTempMY = 1;
m_fTempC = (FLOAT)(1.0 / 9.0);
Thre = 0;
Num[0] = 1.0;
Num[1] = 1.0;
Num[2] = 1.0;
Num[3] = 1.0;
Num[4] = 1.0;
Num[5] = 1.0;
Num[6] = 1.0;
Num[7] = 1.0;
Num[8] = 1.0;
反色
m_iTempH = 3;
m_iTempW = 3;
m_iTempMX = 1;
m_iTempMY = 1;
m_fTempC = -1;
Thre = 255;
Num[0] = 0;
Num[1] = 0;
Num[2] = 0;
Num[3] = 0;
Num[4] = 1.0;
Num[5] = 0;
Num[6] = 0;
Num[7] = 0;
Num[8] = 0;
拉普拉斯锐化
m_iTempH = 3;
m_iTempW = 3;
m_iTempMX = 1;
m_iTempMY = 1;
m_fTempC = 1;
Thre = 0;
Num[0] = 1.0;
Num[1] = 1.0;
Num[2] = 1.0;
Num[3] = 1.0;
Num[4] = -8.0;
Num[5] = 1.0;
Num[6] = 1.0;
Num[7] = 1.0;
Num[8] = 1.0;
浮雕
m_iTempH = 3;
m_iTempW = 3;
m_iTempMX = 1;
m_iTempMY = 1;
m_fTempC = 1.0;
Thre = 0;
Num[0] = -2;
Num[1] = -1;
Num[2] = 0;
Num[3] = -1;
Num[4] = 1;
Num[5] = 1;
Num[6] = 0;
Num[7] = 1;
Num[8] = 2;
Sobel
m_iTempH = 3;
m_iTempW = 3;
m_iTempMX = 1;
m_iTempMY = 1;
m_fTempC = 1.0;
Gy:
Num[0] = -1;
Num[1] = 0;
Num[2] = 1;
Num[3] = -2;
Num[4] = 0;
Num[5] = 2;
Num[6] = -1;
Num[7] = 0;
Num[8] = 1;
Gx:
Num[0] = 1;
Num[1] = 2;
Num[2] = 1;
Num[3] = 0;
Num[4] = 0;
Num[5] = 0;
Num[6] = -1;
Num[7] = -2;
Num[8] = -1;
Prewitt
m_iTempH = 3;
m_iTempW = 3;
m_iTempMX = 1;
m_iTempMY = 1;
m_fTempC = 1.0;
Thre = 0;
Gx:
Num[0] = 1;
Num[1] = 1;
Num[2] = 1;
Num[3] = 0;
Num[4] = 0;
Num[5] = 0;
Num[6] = -1;
Num[7] = -1;
Num[8] = -1;
Gy:
Num[0] = -1;
Num[1] = 0;
Num[2] = 1;
Num[3] = -1;
Num[4] = 0;
Num[5] = 1;
Num[6] = -1;
Num[7] = 0;
Num[8] = 1;
