《Visual C实践与提高―数字图像处理与工程应用篇》

1、第五章图像的几何变换数字图像平移图像平移函数/* 函数名称:Translation(LPSTR lpSrcStartBits, long lWidth, long lHeight, long lXOffset,long lYOffset,long lLineBytes,long lDstLineBytes* 函数参数:* LPSTR lpSrcStartBits,指向源DIB起始像素的指针* long lWidth,DIB图象的宽度* long lHeight,DIB图象的高度* long lXOffset,X方向偏移量* long lYOffset,Y方向偏移量* long lLineByt

2、es,DIB图象的行字节数,为4的倍数* long lDstLineBytes,临时DIB图象的行字节数,为4的倍数* 函数类型:BOOL* 函数功能:该函数用来平移DIB图象*/ BOOL Translation(LPSTR lpSrcStartBits, long lWidth, long lHeight,long lXOffset, long lYOffset,long lLineBytes,long lDstLineByteslong i; /行循环变量long j; /列循环变量LPSTR lpSrcDIBBits; /指向源像素的指针LPSTR lpDstDIBBits; /指向临

3、时图象对应像素的指针LPSTR lpDstStartBits; /指向临时图象对应像素的指针HLOCAL hDstDIBBits; /临时图象句柄hDstDIBBits= LocalAlloc(LHND, lWidth * lDstLineBytes;/ 分配临时内存lpDstStartBits= (char * LocalLock(hDstDIBBits;/ 锁定内存if (hDstDIBBits= NULL/ 判断是否内存分配return FALSE;/ 分配内存失败for(i = 0; i < lHeight; i+/ 行for(j = 0; j < lWidth; j+ /

4、 列lpDstDIBBits=(char*lpDstStartBits+lLineBytes*(lHeight-1-i+j;/ 指向新DIB第i行,第j个像素的指针if( (j-lYOffset>= 0 && (j-lYOffset< lWidth && / 像素在源DIB中的坐标j-lXOffset (i-lXOffset>= 0 && (i-lXOffset < lHeight/ 判断是否在源图范围内lpSrcDIBBits=(char *lpSrcStartBits+lLineBytes*(lHeight-1-(i-

5、lXOffset+(j-lYOffset;/ 指向源DIB第i0行,第j0个像素的指针*lpDstDIBBits= *lpSrcDIBBits;/ 复制像素else* (unsigned char*lpDstDIBBits = 255;/ 源图中没有的像素,赋为255 memcpy(lpSrcStartBits, lpDstStartBits, lLineBytes * lHeight;/ 复制图象LocalUnlock(hDstDIBBits;/ 释放内存LocalFree(hDstDIBBits;return TRUE;该函数调用函数CDImagePorcess View视图类的/图像平移

6、void CDImageProcessView:OnTranslation(/ TODO: Add your command handler code hereCDImageProcessDoc* pDoc = GetDocument(;/long lSrcLineBytes; /图象每行的字节数long lSrcWidth; /图象的宽度和高度long lSrcHeight;LPSTR lpSrcDib; /指向源图象的指针LPSTR lpSrcStartBits; /指向源像素的指针long lDstLineBytes; /新图象每行的字节数lpSrcDib= (LPSTR :Global

7、Lock(HGLOBAL pDoc->GetHObject(;/ 锁定DIBif (pDoc->m_dib.GetColorNum(lpSrcDib != 256/ 判断是否是8-bpp位图AfxMessageBox("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= pD

8、oc->m_dib.GetWidth(lpSrcDib; / 获取图象的宽度lSrcHeight= pDoc->m_dib.GetHeight(lpSrcDib; / 获取图象的高度lSrcLineBytes=pDoc->m_dib.GetReqByteWidth(lSrcWidth * 8; / 计算图象每行的字节数/ lDstLineBytes=pDoc->m_dib.GetReqByteWidth(lSrcHeight * 8; / 计算新图象每行的字节数CDlgTran TranPara;/ 创建对话框if (TranPara.DoModal( != IDOK/

9、 显示对话框,提示用户设定量return;int temver=TranPara.m_verOff;int temhor=TranPara.m_horOff;if (Translation(lpSrcStartBits, lSrcWidth,lSrcHeight,/ 调用Translation(函数平移DIB temver,temhor,lSrcLineBytes,lDstLineBytespDoc->SetModifiedFlag(TRUE; / 设置脏标记pDoc->UpdateAllViews(NULL; / 更新视图:GlobalUnlock(HGLOBAL pDoc-&g

10、t;GetHObject(; / 解除锁定elseAfxMessageBox(_T("分配内存失败!"/警告数字图像旋转图像旋转函数/* 函数名称:Rotate(LPSTR lpSrcDib, LPSTR lpSrcStartBits,long lWidth, long lHeight,long lLineBytes, WORD palSize, long lDstWidth,long lDstHeight,long lDstLineBytes,float fSina, float fCosa* 函数参数:* LPSTR lpSrcDib,指向源DIB的指针* LPSTR

11、lpSrcStartBits,指向源DIB的起始像素的指针* long lWidth,源DIB图象宽度* long lHeight,源DIB图象高度* long lLineBytes,源DIB图象字节宽度(4的倍数* WORD palSize,源DIB图象调色板大小* long lDstWidth,目标图象宽度* long lDstHeight,目标DIB图象高度* long lDstLineBytes,目标DIB图象行字节数(4的倍数* float fSina,旋转角的余弦,说明:为了避免两次求取正余弦,这里作为两个函数参数来用* float fCosa,旋转角的正弦* 函数类型:HGLOB

12、AL* 函数功能:用来旋转DIB图象*/ HGLOBAL Rotate(LPSTR lpSrcDib, LPSTR lpSrcStartBits,long lWidth, long lHeight,long lLineBytes, WORD palSize, long lDstWidth,long lDstHeight,long lDstLineBytes,float fSina, float fCosafloat varFloat1; /浮点参数变量1float varFloat2; /浮点参数变量2LPSTR lpDstDib; /指向临时图象的指针long i; /行循环变量long j

13、; /列循环变量long i1; /行循环变量long j1; /列循环变量LPSTR lpSrcDIBBits; /指向源像素的指针LPSTR lpDstDIBBits; /指向临时图象对应像素的指针LPSTR lpDstStartBits; /指向临时图象对应像素的指针LPBITMAPINFOHEADER lpbmi;/ 指向BITMAPINFOHEADER结构的指针varFloat1= (float (-0.5 * (lDstWidth - 1 * fCosa - 0.5 * (lDstHeight - 1 * fSina/ 将经常用到的两个常数事先求出,以便作为常数使用+ 0.5 *

14、(lDstWidth - 1;varFloat2= (float ( 0.5 * (lDstWidth - 1 * fSina - 0.5 * (lDstHeight - 1 * fCosa+ 0.5 * (lDstHeight - 1;HGLOBAL hDIB = (HGLOBAL :GlobalAlloc(GHND, lDstLineBytes * lDstHeight + *(LPDWORDlpSrcDib +palSize;/ 分配内存,以保存新DIBif (hDIB = NULL/ 判断是否是有效的DIB对象return FALSE;/ 不是,则返回lpDstDib= (char *

15、 :GlobalLock(HGLOBAL hDIB;/ 锁定内存memcpy(lpDstDib,lpSrcDib, *(LPDWORDlpSrcDib +palSize;/ 复制DIB信息头和调色板lpbmi = (LPBITMAPINFOHEADERlpDstDib;/ 获取指针lpbmi->biHeight=lDstHeight;/ 更新DIB中图象的高度和宽度lpbmi->biWidth =lDstWidth;lpDstStartBits=lpDstDib+ *(LPDWORDlpDstDib+palSize;/ 求像素起始位置,作用如同:FindDIBBits(gCo.lp

16、SrcDib,这里尝试使用了这种方法,以避免对全局函数的调用for(i = 0; i < lDstHeight; i+/ 行操作for(j = 0; j < lDstWidth; j+/ 列操作lpDstDIBBits= (char *lpDstStartBits+ lDstLineBytes * (lDstHeight - 1 - i + j;/ 指向新DIB第i行,第j个像素的指针i1= (long (-(float j * fSina + (float i * fCosa + varFloat2 + 0.5;/ 计算该像素在源DIB中的坐标j1= (long ( (float

17、 j * fCosa + (float i * fSina + varFloat1 + 0.5;if( (j1>= 0 && (j1< lWidth && (i1>= 0 && (i1< lHeight/ 判断是否在源图内lpSrcDIBBits= (char *lpSrcStartBits+ lLineBytes * (lHeight - 1 -i1 + j1;/ 指向源DIB第i0行,第j0个像素的指针*lpDstDIBBits= *lpSrcDIBBits;/ 复制像素else* (unsigned char*lpD

18、stDIBBits = 255;/ 源图中不存在的像素,赋为255 return hDIB;该函数调用函数CDImagePorcess View视图类的/图像旋转void CDImageProcessView:OnRotation(/ TODO: Add your command handler code hereCDImageProcessDoc* pDoc = GetDocument(;/long lSrcLineBytes; /图象每行的字节数long lSrcWidth; /图象的宽度和高度long lSrcHeight;LPSTR lpSrcDib; /指向源图象的指针LPSTR l

19、pSrcStartBits; /指向源像素的指针long lDstWidth; /临时图象的宽度和高度long lDstHeight;lpSrcDib= (LPSTR :GlobalLock(HGLOBAL pDoc->GetHObject(;/ 锁定DIBif (pDoc->m_dib.GetColorNum(lpSrcDib != 256/ 判断是否是8-bpp位图AfxMessageBox("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

20、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lSrcLineBytes=pDoc->m_dib.GetReqByteWidth(lSrcWidth * 8; / 计算图象每行的字节数long lDstLineBytes;/ CDlgRot RotPara;/ 创

21、建对话框if(RotPara.DoModal( != IDOK/ 显示对话框,设定旋转角度return;DWORD palSize=pDoc->m_dib.GetPalSize(lpSrcDib;float fRotateAngle = (float AngleToRadian(RotPara.m_rotAngle;/ 将旋转角度从度转换到弧度float fSina = (float sin(doublefRotateAngle;/ 计算旋转角度的正余弦float fCosa = (float cos(doublefRotateAngle;float fSrcX1,fSrcY1,fSrc

22、X2,fSrcY2,fSrcX3,fSrcY3,fSrcX4,fSrcY4;/ 旋转前四个角的坐标(以图象中心为坐标系原点float fDstX1,fDstY1,fDstX2,fDstY2,fDstX3,fDstY3,fDstX4,fDstY4;/ 旋转后四个角的坐标(以图象中心为坐标系原点fSrcX1 = (float (- (lSrcWidth - 1 / 2;/ 计算原图的四个角的坐标fSrcY1 = (float ( (lSrcHeight - 1 / 2;fSrcX2 = (float ( (lSrcWidth - 1 / 2;fSrcY2 = (float ( (lSrcHeigh

23、t - 1 / 2;fSrcX3 = (float (- (lSrcWidth - 1 / 2;fSrcY3 = (float (- (lSrcHeight - 1 / 2;fSrcX4 = (float ( (lSrcWidth - 1 / 2;fSrcY4 = (float (- (lSrcHeight - 1 / 2;fDstX1 = fCosa * fSrcX1 + fSina * fSrcY1;/ 计算新图四个角的坐标fDstY1 = -fSina * fSrcX1 + fCosa * fSrcY1;fDstX2 = fCosa * fSrcX2 + fSina * fSrcY2;f

24、DstY2 = -fSina * fSrcX2 + fCosa * fSrcY2;fDstX3 = fCosa * fSrcX3 + fSina * fSrcY3;fDstY3 = -fSina * fSrcX3 + fCosa * fSrcY3;fDstX4 = fCosa * fSrcX4 + fSina * fSrcY4;fDstY4 = -fSina * fSrcX4 + fCosa * fSrcY4;lDstWidth= (long ( max( fabs(fDstX4 - fDstX1, fabs(fDstX3 - fDstX2 + 0.5;/ 计算旋转后的图象实际宽度lDstLi

25、neBytes=pDoc->m_dib.GetReqByteWidth(lDstWidth * 8;/ 计算新图象每行的字节数lDstHeight= (long ( max( fabs(fDstY4 - fDstY1, fabs(fDstY3 - fDstY2 + 0.5;/ 计算旋转后的图象高度HGLOBAL hDstDIB = NULL;/ 创建新DIBhDstDIB = (HGLOBAL Rotate(lpSrcDib,lpSrcStartBits,lSrcWidth,lSrcHeight,lSrcLineBytes, palSize,lDstWidth,lDstHeight,lD

26、stLineBytes,fSina,fCosa;/ 调用Rotate(函数旋转DIBif(hDstDIB != NULL/ 判断旋转是否成功pDoc->UpdateObject(hDstDIB;/ 替换DIB,同时释放旧DIB对象pDoc->SetDib(;/ 更新DIB大小和调色板pDoc->SetModifiedFlag(TRUE; / 设置脏标记pDoc->UpdateAllViews(NULL; / 更新视图:GlobalUnlock(HGLOBAL pDoc->GetHObject(; / 解除锁定elseAfxMessageBox(_T("分

27、配内存失败!"/ 警告数字图像缩放图像缩放函数/* 函数名称:Zoom(LPSTR lpSrcDib, LPSTR lpSrcStartBits,long lWidth, long lHeight,long lLineBytes, WORD palSize, long lDstWidth,long lDstHeight,long lDstLineBytes,float fXZoomRatio, float fYZoomRatio * 函数参数:* LPSTR lpSrcDib,指向源DIB的指针* LPSTR lpSrcStartBits,指向源DIB的起始像素的指针* long l

28、Width,源DIB图象宽度* long lHeight,源DIB图象高度* long lLineBytes,源DIB图象字节宽度(4的倍数* WORD palSize,源DIB图象调色板大小* long lDstWidth,目标图象宽度* long lDstHeight,目标DIB图象高度* long lDstLineBytes,目标DIB图象行字节数(4的倍数* float fhorRatio,水平缩放比率* float fverRatio,垂直缩放比率* 函数类型:HGLOBAL* 函数功能:用来缩放DIB图象*/HGLOBAL Zoom(LPSTR lpSrcDib, LPSTR lp

29、SrcStartBits,long lWidth, long lHeight,long lLineBytes, WORD palSize,long lDstWidth,long lDstLineBytes,long lDstHeight,float fhorRatio,float fverRatioLPSTR lpDstDib; /指向临时图象的指针long i; /行循环变量long j; /列循环变量long i1; /行循环变量long j1; /列循环变量LPSTR lpSrcDIBBits; /指向源像素的指针LPSTR lpDstDIBBits; /指向临时图象对应像素的指针LPS

30、TR lpDstStartBits; /指向临时图象对应像素的指针LPBITMAPINFOHEADER lpbmi;/ 指向BITMAPINFO结构的指针/ 分配内存,以保存缩放后的DIBHGLOBAL hDIB = (HGLOBAL :GlobalAlloc(GHND, lDstLineBytes* lDstHeight + *(LPDWORDlpSrcDib +palSize;if (hDIB = NULL/ 判断是否是有效的DIB对象return FALSE;/ 不是,则返回lpDstDib= (char * :GlobalLock(HGLOBAL hDIB;/ 锁定内存memcpy(l

31、pDstDib, lpSrcDib, *(LPDWORDlpSrcDib +palSize;/ 复制DIB信息头和调色板lpDstStartBits=lpDstDib+ *(LPDWORDlpDstDib/ 找到新DIB像素起始位置+palSize;/ 求像素起始位置,作用如同:FindDIBBits(lpSrcDib,这里尝试使用了这种方法,以避免对全局函数的调用lpbmi = (LPBITMAPINFOHEADERlpDstDib;/ 获取指针lpbmi->biWidth = lDstWidth;/ 更新DIB中图象的高度和宽度lpbmi->biHeight =lDstHeig

32、ht;for(i = 0; i < lDstHeight; i+/ 行操作for(j = 0; j < lDstWidth; j+/ 列操作/ 指向新DIB第i行,第j个像素的指针lpDstDIBBits= (char *lpDstStartBits + lDstLineBytes * (lDstHeight-1-i+j;i1= (long (i / fverRatio + 0.5;/ 计算该像素在源DIB中的坐标j1= (long (j / fhorRatio + 0.5;if( (j1>= 0 && (j1< lWidth && (i

33、1>= 0 && (i1< lHeight/ 判断是否在源图内lpSrcDIBBits= (char *lpSrcStartBits+ lLineBytes * (lHeight - 1 -i1 + j1;/ 指向源DIB第i行,第j个像素的指针*lpDstDIBBits= *lpSrcDIBBits;/ 复制像素else* (unsigned char*lpDstDIBBits = 255;/ 源图中不存在的像素,赋为255 return hDIB;该函数调用函数CDImagePorcess View视图类的/图像缩放void CDImageProcessView

34、:OnZoom(/ TODO: Add your command handler code hereCDImageProcessDoc* pDoc = GetDocument(;/long lSrcLineBytes; /图象每行的字节数long lSrcWidth; /图象的宽度和高度long lSrcHeight;LPSTR lpSrcDib; /指向源图象的指针LPSTR lpSrcStartBits; /指向源像素的指针long lDstWidth; /临时图象的宽度和高度long lDstHeight;long lDstLineBytes;lpSrcDib= (LPSTR :Glob

35、alLock(HGLOBAL pDoc->GetHObject(;/ 锁定DIBif (pDoc->m_dib.GetColorNum(lpSrcDib != 256/ 判断是否是8-bpp位图AfxMessageBox("对不起,不是256色位图!"/ 警告:GlobalUnlock(HGLOBAL pDoc->GetHObject(;/ 解除锁定return; /返回lpSrcStartBits=pDoc->m_dib.GetBits(lpSrcDib; / 找到DIB图象像素起始位置lSrcWidth= pDoc->m_dib.GetWi

36、dth(lpSrcDib; / 获取图象的宽度lSrcHeight= pDoc->m_dib.GetHeight(lpSrcDib; / 获取图象的高度lSrcLineBytes=pDoc->m_dib.GetReqByteWidth(lSrcWidth * 8; / 计算图象每行的字节数/ DWORD palSize=pDoc->m_dib.GetPalSize(lpSrcDib;CDlgZoom ZoomPara;/ 创建对话框,设定平移量if (ZoomPara.DoModal( != IDOKreturn;float fX = ZoomPara.m_horZoom;/

37、 获取设定的平移量,缩放比率float fY = ZoomPara.m_verZoom;lDstWidth= (long (lSrcWidth*fX + 0.5;/ 计算缩放后的图象实际宽度,加0.5是由于强制类型转换时不四舍五入,而是直接截去小数部分lDstLineBytes=pDoc->m_dib.GetReqByteWidth(lDstWidth * 8; /转换后图象应有的行字节数,为4的倍数lDstHeight= (long (lSrcHeight * fY + 0.5;/ 计算缩放后的图象高度HGLOBAL hDstDIB = NULL;/ 创建新DIBhDstDIB = (

38、HGLOBAL Zoom(lpSrcDib,lpSrcStartBits,lSrcWidth,lSrcHeight,lSrcLineBytes,palSize,lDstWidth,lDstLineBytes,lDstHeight,fX, fY;/ 调用Zoom(函数转置DIBif(hDstDIB != NULL/ 判断旋转是否成功pDoc->UpdateObject(hDstDIB;/ 替换DIB,同时释放旧DIB对象pDoc->SetDib(;/ 更新DIB大小和调色板pDoc->SetModifiedFlag(TRUE; / 设置脏标记pDoc->UpdateAll

39、Views(NULL; / 更新视图:GlobalUnlock(HGLOBAL pDoc->GetHObject(; / 解除锁定elseAfxMessageBox(_T("分配内存失败!"/ 警告数字图像转置图像转置函数/* 函数名称:* Transpose(LPSTR lpSrcDib,LPSTR lpDibBits,long lWidth,long lHeight,long lLineBytes,long lDstLineBytes* 函数参数:* LPSTR lpSrcDib,指向源DIB的指针LPSTR lpSrcStartBits,指向DIB起始像素的指针

40、long lWidth,DIB图象的宽度long lHeight,DIB图象的高度long lLineBytes,DIB图象的行字节数,为4的倍数long lDstLineBytes,临时DIB图象的行字节数,为4的倍数* 函数类型:BOOL* 函数功能:该函数用来转置DIB图象*/BOOL Transpose(LPSTR lpSrcDib,LPSTR lpSrcStartBits,long lWidth,long lHeight,long lLineBytes,long lDstLineByteslong i; /行循环变量long j; /列循环变量LPSTR lpSrcDIBBits;

41、/指向源像素的指针LPSTR lpDstDIBBits; /指向临时图象对应像素的指针LPSTR lpDstStartBits; /指向临时图象对应像素的指针HLOCAL hDstDIBBits; /临时图象句柄LPBITMAPINFOHEADER lpbmi; / 指向BITMAPINFOHEADER结构的指针lpbmi = (LPBITMAPINFOHEADERlpSrcDib;hDstDIBBits= LocalAlloc(LHND, lWidth * lDstLineBytes;/ 分配临时内存if (hDstDIBBits= NULL / 判断是否内存分配return FALSE;

42、/ 分配内存失败lpDstStartBits= (char * LocalLock(hDstDIBBits; / 锁定内存for(i = 0; i < lHeight; i+ / 针对图象每行进行操作for(j = 0; j < lWidth; j+ / 针对图象每列进行操作lpSrcDIBBits= (char *lpSrcStartBits + lLineBytes * (lHeight - 1 - i + j;/ 指向源DIB 第i行,第j个像素的指针lpDstDIBBits= (char *lpDstStartBits + lDstLineBytes * (lWidth -

43、 1 - j + i;/ 指向转置DIB第j行,第i个像素的指针*(lpDstDIBBits= *(lpSrcDIBBits; / 复制像素memcpy(lpSrcStartBits, lpDstStartBits, lWidth * lDstLineBytes;/ 复制转置后的图象lpbmi->biWidth = lHeight;lpbmi->biHeight = lWidth;LocalUnlock(hDstDIBBits; / 释放内存LocalFree(hDstDIBBits;return TRUE; / 返回该函数调用函数CDImagePorcess View视图类的/图

44、像转置void CDImageProcessView:OnTranspose(/ TODO: Add your command handler code hereCDImageProcessDoc* pDoc = GetDocument(;/ long lSrcLineBytes; /图象每行的字节数long lSrcWidth; /图象的宽度和高度long lSrcHeight;LPSTR lpSrcDib; /指向源图象的指针LPSTR lpSrcStartBits; /指向源像素的指针long lDstLineBytes; /新图象每行的字节数lpSrcDib= (LPSTR :Glob

45、alLock(HGLOBAL pDoc->GetHObject(;/ 锁定DIBif (pDoc->m_dib.GetColorNum(lpSrcDib != 256/ 判断是否是8-bpp位图AfxMessageBox("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=

46、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lSrcLineBytes=pDoc->m_dib.GetReqByteWidth(lSrcWidth * 8; / 计算图象每行的字节数/lDstLineBytes=pDoc->m_dib.GetReqByteWidth(lSrcHeight * 8; / 计算新图象每行的字节数if (Transpose(lpSrcDib,lpSrcStartBits,lSrcWidth,lSrcHe

47、ight,lSrcLineBytes,lDstLineBytes / 调用Transpose(函数转置DIB pDoc->SetDib(; / 更新DIB大小和调色板pDoc->SetModifiedFlag(TRUE; / 设置脏标记pDoc->UpdateAllViews(NULL; / 更新视图:GlobalUnlock(HGLOBAL pDoc->GetHObject(; / 解除锁定elseAfxMessageBox(_T("分配内存失败!" / 警告数字图像垂直镜像图像垂直镜像函数/* 函数名称:Mirrorchuizhi(LPSTR l

48、pSrcStartBits, long lWidth, long lHeight,long lLineBytes* 函数参数:LPSTR lpSrcStartBits,指向DIB起始像素的指针long lWidth,DIB图象的宽度long lHeight,DIB图象的高度long lLineBytes,DIB图象的行字节数,为4的倍数* 函数类型:BOOL* 函数功能:该函数用来镜像DIB图象,本程序实现垂直镜像*/BOOL Mirrorchuizhi(LPSTR lpSrcStartBits, long lWidth, long lHeight,long lLineByteslong i;

49、 /行循环变量long j; /列循环变量LPSTR lpSrcDIBBits; /指向源像素的指针LPSTR lpDstDIBBits; /指向临时图象对应像素的指针HLOCAL hDstDIBBits; /临时图象句柄LPSTR lpBits; / 指向中间像素的指针,当复制图象时,提供临时的像素内存空间hDstDIBBits= LocalAlloc(LHND, lLineBytes;/ 分配临时内存保存行图象if (hDstDIBBits = NULLreturn FALSE; / 分配内存失败lpDstDIBBits= (char * LocalLock(hDstDIBBits;/ 锁

50、定for(i = 0; i < lHeight/2; i+/ 垂直镜像,针对图象每行进行操作lpSrcDIBBits= (char *lpSrcStartBits + lLineBytes * i;/ 指向倒数第i行像素起点的指针lpBits= (char *lpSrcStartBits + lLineBytes * (lHeight-i - 1 ;/ 指向第i行像素起点的指针memcpy(lpDstDIBBits,lpBits,lLineBytes;/备份一行,宽度为lWidthmemcpy(lpBits,lpSrcDIBBits,lLineBytes;/将倒数第i行像素复制到第i行m

51、emcpy(lpSrcDIBBits,lpDstDIBBits,lLineBytes;/将第i行像素复制到倒数第i行LocalUnlock(hDstDIBBits;/ 释放内存LocalFree(hDstDIBBits;return TRUE;数字图像水平镜像图像水平镜像函数/* 函数名称:Mirror(LPSTR lpSrcStartBits, long lWidth, long lHeight,long lLineBytes* 函数参数:LPSTR lpSrcStartBits,指向DIB起始像素的指针long lWidth,DIB图象的宽度long lHeight,DIB图象的高度long lLineBytes,DIB图象的行字节数,为4的倍数* 函数类型:BOOL* 函数功能:该函数用来镜像DIB图象,本程序只实现了水平镜像,垂直镜像的原理书中也谈到。很容易实现*/BOOL Mirror(LPSTR lpSrcStartBits, long lWidth,