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This article mainly introduces the C language how to achieve BMP image closed operation processing, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let the editor take you to understand it.

The closed operation can take out the specific image details which are smaller than the structural elements, while ensuring that the global geometric distortion does not occur. Fill a gap or hole smaller than a structural element and connect it with short breaks.

Operation: that is, first expand and then erode.

# include # include # include int main (int* argc, char** argv) {FILE* fp = fopen (". / threshold.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; fread (pColorTable, sizeof (RGBQUAD), 256, fp); unsigned char* pBmpBuf; pBmpBuf = new unsigned char [lineByte*height]; fread (pBmpBuf, lineByte*height, 1, fp); fclose (fp); / / New figure FILE* fop = fopen ("close.bmp", "wb"); if (fop = 0) return 0; / / expansion operation / / initialization int t = 0, d = 0, r = 0; unsigned char* pBmpBuf2 PBmpBuf2 = new unsigned char [lineByte*height]; for (int I = 0; I

< height; ++i){ for (int j = 0; j < width; ++j){ *(pBmpBuf2 + i*lineByte + j) = 255; } } for (int i = 1; i < height; ++i){ for (int j = 0; j < width - 1; ++j){ t = *(pBmpBuf + i*lineByte + j); // 当前点 d = *(pBmpBuf + (i - 1)*lineByte + j); // 下面点 r = *(pBmpBuf + i*lineByte + j + 1); // 右边点 if (t == 0 && d == 0 && r == 0){ *(pBmpBuf2 + i*lineByte + j) = 0; // 当前点 } } } // 结构元素向上反转180度，对最下面一排处理 for (int j = 0; j < width - 1; ++j){ t = *(pBmpBuf + j); // 当前点 d = *(pBmpBuf + lineByte + j); // 上面点 r = *(pBmpBuf + j + 1); // 右边点 if (t == 0 && d == 0 && r == 0){ *(pBmpBuf2 + j) = 0; // 当前点 } } // 结构元素向右反转，对最右边一列处理 for (int i = 1; i < height; ++i){ t = *(pBmpBuf + i*lineByte + width - 1); d = *(pBmpBuf + (i - 1)*lineByte + width - 1); r = *(pBmpBuf + i*lineByte + width - 2); if (t == 0 && d == 0 && r == 0){ *(pBmpBuf2 + i*lineByte + width - 1) = 0; // 当前点 } } // 腐蚀操作 for (int i = 1; i < height; ++i){ for (int j = 0; j < width - 1; ++j){ t = *(pBmpBuf2 + i*lineByte + j); // 当前点 d = *(pBmpBuf2 + (i - 1)*lineByte + j); // 下面点 r = *(pBmpBuf2 + i*lineByte + j + 1); // 右边点 if (t == 0 && d != 0){ *(pBmpBuf2 + (i - 1)*lineByte + j) = 0;//下边的置位1 } if (t == 0 && r != 0){ *(pBmpBuf2 + i*lineByte + j + 1) = 0;//右边的置位1 j = j + 1; } } } fwrite(&fileHead, sizeof(BITMAPFILEHEADER), 1, fop); fwrite(&infoHead, sizeof(BITMAPINFOHEADER), 1, fop); fwrite(pColorTable, sizeof(RGBQUAD), 255, fop); fwrite(pBmpBuf2, lineByte*height, 1, fop); fclose(fop); system("pause"); return 0;} 实验结果：

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