c/c++语言开发共享C语言实现BMP图像边缘检测处理

  #include <stdio.h>  #include <stdlib.h>  #include <windows.h>  #include <math.h>     int main(int* argc, char** argv)  {   file* fp = fopen("./01.bmp", "rb");   if (fp == 0)    return 0;   bitmapfileheader filehead;   fread(&filehead, sizeof(bitmapfileheader), 1, fp);      bitmapinfoheader infohead;   fread(&infohead, sizeof(bitmapinfoheader), 1, fp);   int width = infohead.biwidth;   int height = infohead.biheight;   int bicount = infohead.bibitcount;      int linebyte = (bicount*width / 8 + 3) / 4 * 4;   rgbquad* pcolortable;   pcolortable = new rgbquad[256];   fread(pcolortable, sizeof(rgbquad), 256, fp);      unsigned char* pbmpbuf;   pbmpbuf = new unsigned char[linebyte*height];   fread(pbmpbuf, linebyte*height, 1, fp);   fclose(fp);      // 新图   file* fop = fopen("sobel.bmp", "wb");   if (fop == 0)    return 0;   unsigned char *pbmpbuf2;   // 初始化   pbmpbuf2 = new unsigned char[linebyte*height];   for (int i = 0; i < height; ++i){    for (int j = 0; j < width; ++j){     *(pbmpbuf2 + i*linebyte + j) = *(pbmpbuf + i*linebyte + j);    }   }         int ul, uc, ur, dl, dc, dr;   int lu, lc, ld, ru, rc, rd;   double hir, vec;   for (int i = 1; i < height - 1; ++i){    for (int j = 1; j < width - 1; ++j){     // 垂直梯度算子：检测水平边缘     vec = 0;     ul = *(pbmpbuf + (i + 1)*linebyte + (j - 1))*(-1);     uc = *(pbmpbuf + (i + 1)*linebyte + j)*(-2);     ur = *(pbmpbuf + (i + 1)*linebyte + j)*(-1);     dl = *(pbmpbuf + (i - 1)*linebyte + (j - 1)) * 1;     dc = *(pbmpbuf + (i - 1)*linebyte + j) * 2;     dr = *(pbmpbuf + (i - 1)*linebyte + j) * 1;     vec = ul + uc + ur + dl + dc + dr;     // 水平梯度算子：检测垂直边缘     hir = 0;     lu = *(pbmpbuf + (i + 1)*linebyte + (j - 1))*(-1);     lc = *(pbmpbuf + (i - 0)*linebyte + (j - 1))*(-2);     ld = *(pbmpbuf + (i - 1)*linebyte + (j - 1))*(-1);     ru = *(pbmpbuf + (i + 1)*linebyte + (j + 1)) * 1;     rc = *(pbmpbuf + (i - 0)*linebyte + (j + 1)) * 2;     rd = *(pbmpbuf + (i - 1)*linebyte + (j + 1)) * 1;     hir = lu + lc + ld + ru + rc + rd;     *(pbmpbuf2+i*linebyte+j) = round(sqrt(hir*hir + vec*vec));    }   }      fwrite(&filehead, sizeof(bitmapfileheader), 1, fop);   fwrite(&infohead, sizeof(bitmapinfoheader), 1, fop);   fwrite(pcolortable, sizeof(rgbquad), 256, fop);   fwrite(pbmpbuf2, linebyte*height, 1, fop);   fclose(fop);      system("pause");   return 0;  }