数字图像处理2

使用C/C++进行图像处理本系列仅针对BMP格式的图像实现的功能包括读，存，二值化，缩放，反色，均值滤波，中值滤波，增强，腐蚀，膨胀功能：二值化（运行本程序需要参考“数字图像处理1”）源码：/*函数功能：彩色图像转化为灰度图象输入参数：RGBQUAD** dataOfBmp_src --- 原图像所有像素（以行为序）对应的RGBAlpha 四元素结构体指针；RGBQUAD** dataOfBmp_dst --- 转化为灰度图象后的图像所有像素（以行为序）对应的RGBAlpha 四元素结构体指针；BYTE** dataOfBmp_gray --- 转化为灰度图象后的图像所有像素（以行为序）对应的灰度值；DWORD width, DWORD height --- 原图像和输出图像的宽度和高度（以像素为单位）输出值：没有*/void RGB2Gray(RGBQUAD** dataOfBmp_src, RGBQUAD** dataOfBmp_dst, BYTE** dataOfBmp_gray, DWORD width, DWORD height){double gray;for(DWORD i=0;i<height;i++){for(DWORD j=0;j<width;j++){gray = 0.299*dataOfBmp_src[i][j].rgbRed+0.587*dataOfBmp_src[i][j].rgbGreen+0.114*dataOfBmp_src[i ][j].rgbBlue;dataOfBmp_gray[i][j] = (BYTE)gray;dataOfBmp_dst[i][j].rgbRed = (BYTE)gray;dataOfBmp_dst[i][j].rgbGreen = (BYTE)gray;dataOfBmp_dst[i][j].rgbBlue = (BYTE)gray;}}}主函数：void main(){BITMAPFILEHEADER bitHead;BITMAPINFOHEADER bitInfoHead;int i, j;FILE* pfile;char strFile[50];printf("please input the .bmp source file name:\n");scanf("%s",strFile);pfile = fopen(strFile,"rb");//打开文件if(pfile!=NULL){printf("file %s open success.\n", strFile);//读取位图文件头信息fread(&bitHead,1,sizeof(BITMAPFILEHEADER),pfile);if(bitHead.bfType != 0x4d42){printf("file is not .bmp file!");return;}showBmpHead(&bitHead);printf("\n\n");//读取位图信息头信息fread(&bitInfoHead,1,sizeof(BITMAPINFOHEADER),pfile);showBmpInforHead(&bitInfoHead);printf("\n");}else{printf("file open fail!\n");return;}RGBQUAD* pRgb=NULL;if(bitInfoHead.biBitCount < 24)//有调色板{//读取调色盘结信息long nPlantNum = bitInfoHead.biClrUsed;if(!nPlantNum)nPlantNum = long(pow(2,double(bitInfoHead.biBitCount))); // Mix color Plant Number;pRgb=new RGBQUAD[nPlantNum*sizeof(RGBQUAD)];memset(pRgb,0,nPlantNum*sizeof(RGBQUAD));int num = fread(pRgb,4,nPlantNum,pfile);printf("Color Plate Number: %d\n",nPlantNum);printf("颜色板信息:\n");showRgbQuan(pRgb, nPlantNum);}int width = bitInfoHead.biWidth;int height = bitInfoHead.biHeight;//分配内存空间把源图存入内存int l_width = WIDTHBYTES(width* bitInfoHead.biBitCount);//计算位图的实际宽度并确保它为32的倍数long nData = height*l_width;BYTE *pColorData= new BYTE[nData];memset(pColorData,0,nData);//把位图数据信息读到数组里fread(pColorData,1,nData,pfile);//将位图数据转化为RGB数据RGBQUAD** dataOfBmp_src=NULL; //用于保存各像素对应的RGB数据dataOfBmp_src = new RGBQUAD*[height];for(i=0; i < height;i++)dataOfBmp_src[i] =new RGBQUAD[width];if(bitInfoHead.biBitCount<24)//有调色板，即位图为非真彩色{int k;if(bitInfoHead.biBitCount <= 8 && !bitInfoHead.biCompression){int pnum = 8/bitInfoHead.biBitCount;int mbnum = 8-bitInfoHead.biBitCount;for(int i=0;i<height;i++){int k0 = (height-i-1)*l_width;//k:取得该像素颜色数据在实际数据数组中的序号for(int j=0;j<width;j++){BYTE mixIndex= 0;k = k0+(j/pnum);mixIndex = pColorData[k];//mixIndex:提取当前像素的颜色的在颜色表中的索引值if(bitInfoHead.biBitCount < 8){mixIndex = mixIndex<<((j%pnum)*bitInfoHead.biBitCount);mixIndex = mixIndex>>mbnum;}//将像素颜色数据（RGBA）保存到数组中对应的位置dataOfBmp_src[i][j].rgbRed = pRgb[mixIndex].rgbRed;dataOfBmp_src[i][j].rgbGreen = pRgb[mixIndex].rgbGreen;dataOfBmp_src[i][j].rgbBlue = pRgb[mixIndex].rgbBlue;dataOfBmp_src[i][j].rgbReserved = pRgb[mixIndex].rgbReserved;}}}if(bitInfoHead.biBitCount == 16){if(!bitInfoHead.biCompression){for( i=0;i<height;i++){int k0 = (height-i-1)*l_width;for( j=0;j<width;j++){WORD mixIndex= 0;k = k0+j*2;WORD shortTemp;shortTemp = pColorData[k+1];shortTemp = shortTemp<<8;mixIndex = pColorData[k] + shortTemp;dataOfBmp_src[i][j].rgbRed = pRgb[mixIndex].rgbRed;dataOfBmp_src[i][j].rgbGreen = pRgb[mixIndex].rgbGreen;dataOfBmp_src[i][j].rgbBlue = pRgb[mixIndex].rgbBlue;dataOfBmp_src[i][j].rgbReserved = pRgb[mixIndex].rgbReserved;}}}}}else//位图为24/32位真彩色{int k;int index = 0;if(bitInfoHead.biBitCount == 16){for( i=0;i<height;i++){int k0 = (height-i-1)*l_width;for( j=0;j<width;j++){k = k0+j*2;if(!bitInfoHead.biCompression)//555格式{dataOfBmp_src[i][j].rgbBlue=pColorData[k]&0x1F;dataOfBmp_src[i][j].rgbGreen=(((pColorData[k+1]<<6)&0xFF)>>3)+(pColorData[k]>>5);dataOfBmp_src[i][j].rgbRed=(pColorData[k+1]<<1)>>3;dataOfBmp_src[i][j].rgbReserved = 0;}}}}if(bitInfoHead.biBitCount == 24 && !bitInfoHead.biCompression){for( i=0;i<height;i++){int k0 = (height-i-1)*l_width;for( j=0;j<width;j++){k = k0+(j*3);dataOfBmp_src[i][j].rgbRed = pColorData[k+2];dataOfBmp_src[i][j].rgbGreen = pColorData[k+1];dataOfBmp_src[i][j].rgbBlue = pColorData[k];dataOfBmp_src[i][j].rgbReserved = 0;}}}if(bitInfoHead.biBitCount == 32 && !bitInfoHead.biCompression){for( i=0;i<height;i++){int k0 = (height-i-1)*l_width;for( j=0;j<width;j++){k = k0+(j*4);dataOfBmp_src[i][j].rgbRed = pColorData[k+2];dataOfBmp_src[i][j].rgbGreen = pColorData[k+1];dataOfBmp_src[i][j].rgbBlue = pColorData[k];dataOfBmp_src[i][j].rgbReserved = pColorData[k+3];}}}}dataOfBmp_dst = new RGBQUAD*[height];for(i=0; i<height; i++)dataOfBmp_dst[i] = new RGBQUAD[width];BYTE** dataOfBmp_gray=NULL;dataOfBmp_gray = new BYTE*[height];for(i=0; i<height; i++)dataOfBmp_gray[i] = new BYTE[width];RGB2Gray(dataOfBmp_src, dataOfBmp_dst, dataOfBmp_gray, width, height);saveBmp(dataOfBmp_dst, width, height);fclose(pfile);if (bitInfoHead.biBitCount<24 && pRgb){delete []pRgb;}for(i=0; i<height; i++)if(dataOfBmp_src[i])delete dataOfBmp_src[i];if(dataOfBmp_src)delete dataOfBmp_src;for(i=0; i<height; i++)if(dataOfBmp_dst[i])delete dataOfBmp_dst[i];if(dataOfBmp_dst)delete dataOfBmp_dst;for(i=0; i<height; i++)if(dataOfBmp_gray[i])delete dataOfBmp_gray[i];if(dataOfBmp_gray)delete dataOfBmp_gray;if(pColorData)delete []pColorData;}。