怎么用C语言实现BMP图像边缘检测处理

这篇文章主要讲解了"怎么用C语言实现BMP图像边缘检测处理"，文中的讲解内容简单清晰，易于学习与理解，下面请大家跟着小编的思路慢慢深入，一起来研究和学习"怎么用C语言实现BMP图像边缘检测处理"吧！

具体内容如下

以Sobel算子为例，其余模板算子卷积代码部分同Sobel算子。如：高斯算子、拉普拉斯算子等

#include #include #include #include  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;}

实验结果：

感谢各位的阅读，以上就是"怎么用C语言实现BMP图像边缘检测处理"的内容了，经过本文的学习后，相信大家对怎么用C语言实现BMP图像边缘检测处理这一问题有了更深刻的体会，具体使用情况还需要大家实践验证。这里是，小编将为大家推送更多相关知识点的文章，欢迎关注！