How to write a Float Mat to a file in OpenCV

Question

I have a matrix

Mat B(480,640,CV_32FC1);

containing floating values..I want to write this matrix to a file which could be opened in notepad or M

Answer 1

use write binary :

FILE* FP = fopen("D.bin","wb");
    int sizeImg[2] = { D.cols , D.rows };
    fwrite(sizeImg, 2, sizeof(int), FP);
    fwrite(D.data, D.cols * D.rows, sizeof(float), FP);
    fclose(FP);

then you can read in in matlab read size and then reshape (type=single)

fp=fopen(fname);
data=fread(fp,2,'int');
width = data(1); height = data(2);
B = fread(fp,Inf,type);

imageOut = reshape(B,[width,height])';

fclose(fp);