标签：部分 import getline not while printf 通用 pre template
最近需要用matlab和C++协同工作，为了规避代码从matlab转化为C++，只能转化数据。（我也转化过代码，发现matlab对于矩阵的计算还是更方便而且快捷）
Opencv 中对于数据的存储好像只有xml、yml等特定格式的文件，而matlab不太容易读取此类文件。于是，我参考了一些网上的方法，写了一个通用版本。
包括两个部分，opencv写，matlab读 与 matlab写，opencv读。此为小儿科，单纯的记录一下，以后直接拿来用即可。
注：为了方便，txt为一列，前两行分别是行数和列数。
1.opencv写，matlab读
//@brief save Mat to txt files //the Mat type must be double int Mat2txt(Mat D, string txt_name) { D.convertTo(D, CV_64FC1); ofstream fout; fout.open("txt_name"); fout << D.rows << endl; fout << D.cols << endl; for (int i = 0; i < D.rows; i++) { for (int j = 0; j < D.cols; j++) { fout << D.ptr<double>(i)[j] << endl; } } fout << flush; fout.close(); return 0; }
%the txt must be one col %and the first and second num must be the rows and cols function[data]=txt2mat(txt_name) txt_data=importdata(txt_name); r=txt_data(1); c=txt_data(2); data=txt_data(3:end); data=reshape(data,[c,r])‘; end
2.matlab写，opencv读
%the txt must be one col
function mat2txt(txt_name)
fid=fopen(txt_name,‘wt‘);
[r,c]=size(A);
fprintf(fid,‘%f\n‘,r);
fprintf(fid,‘%f\n‘,c);
for i=1:1:r
for j=1:1:c
fprintf(fid,‘%f\n‘,A(i,j));
end
end
fclose(fid);
end
//@brief string to num(int,double...) //#include <sstream> template <class Type> Type stringToNum(const string& str) { istringstream iss(str); Type num; iss >> num; return num; } //@brief get the txt file from matlab //the data saved in txt must be one col Mat txt2Mat(string txt_name) { ifstream fin; fin.open(txt_name); if (!fin.is_open()) { cout << "the file can not be opened!" << endl; } string temp; Mat A; int line = 0; int r = 0; int c = 0; while (getline(fin, temp)) { line++; if (line == 1) { r = stringToNum<int>(temp); } else { if (line == 2) c = stringToNum<int>(temp); else { A.push_back(stringToNum<double>(temp)); } } } fin.close(); OPENCV_ASSERT(A.rows == r*c, "TestCvError", "the size doesnt match!"); return (A.reshape(0, r)); }
C++版本的Opencv与matlab矩阵数据通过txt文件传递
标签：部分 import getline not while printf 通用 pre template
原文地址：https://www.cnblogs.com/xilu/p/9102770.html
