ncnn：提取所有层特征值

官方代码托管地址：https://github.com/Tencent/ncnn

在Extractor类中添加以下方法：

int Extractor::extract_all_blobs()
{for (int blob_index = 0; blob_index < blob_mats.size(); blob_index++){Mat outMat;extract(blob_index, outMat);// write to filechar path[256];char id[8];strcpy(path, "./ncnn_blobs_data/");sprintf(id, "%d", blob_index);strcat(path, id);strcat(path, ".txt");FILE *fp = fopen(path, "w+");if(!fp)fprintf(stderr, "error open file\n");// headerfprintf(fp, net->blobs[blob_index].name.c_str());fprintf(fp, "\n");for (int idx = 0; idx < outMat.w * outMat.h * outMat.c; idx++)fprintf(fp, "%f\n", outMat[idx]);fclose(fp);}return 0;
}