Statistical analysis of calibration about stereo-calibration HOT 6 OPEN

@pushkalkatara why are loading the yaml files? I think you only need to record the calibration error (which right now I'm echoing out in the terminal) and the number of images used for calibration (specified by the -n flag).

No need to write a C++ wrapper for matplotlib, you can use python.

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How do I get the data? Do I run the code and store the data? Also, how do you want the comparison done?

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@BarunKGP yes you should collect the data by running the code. You can focus on solving (1) only for now since AprilTags calibration method for (2) isn't implemented yet.

I recommend using matplotlib for plotting.

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The cam_left.yaml and the cam_stereo.yaml files are generated using opencv. Should i load these files using pyyaml in python and plot the graph in matplotlib or should i use matplotlib wrapper for c++?

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@sourishg Please review the PR.

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@sourishg, should I embed python code in calib_intrinsic.cpp to use matplotlib and print out the graphs?

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