CODEWITHSUNDEEP
c++opencv
Engine
Engine

Reputation: 5422

Using fileStorage in opencv

I'm trying to save my cameramatrix into a yml file using cv::FileStorage , this work fine :

cv::FileStorage  fs("calibration_result.yml",cv::FileStorage::WRITE);

..............

this->fs << "the camera matrix is "<<this->cameraMatrix;

here is what I get : 

the camera matrix is : !!opencv-matrix  /* why do I get this 
   rows: 
   cols: 3
   dt: d
   data: [ 6.9722486929603847e+003, 0., 6.3950000000000000e+002, 0.,
       7.0010247500898549e+003, 5.1150000000000000e+002, 0., 0., 1. ]

what I want to get is : 

the camera matrix is :
[ 6.9722486929603847e+003, 0., 6.3950000000000000e+002, 0.,
           7.0010247500898549e+003, 5.1150000000000000e+002, 0., 0., 1. ]

I already tried to use cameraMatrix.data it didn't help!

any idea how can I do this!

thanks in advance !

Upvotes: 1

Views: 3121

Answers (1)

Dmitry Galchinsky
Dmitry Galchinsky

Reputation: 2201

cameraMatrix should have type cv::Mat. cv::Mat is saved this way as can be seen in modules/core/src/persistence.cpp (see icvWriteMat) OpenCV won't be able to understand cv::Mat size without that additional data (is this [...] 3x3 or 1x9 matrix?) and writting is usually used to read written later. You could write what you want using some raw writting techniques (and won't able to read it using opencv) or make your own serializable matrix3x3 or cameraMatrix type.

Upvotes: 2

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