Calibration Wizard

This repository contains the implementation of the paper:

Calibration Wizard: A Guidance System for Camera Calibration Based on Modelling Geometric and Corner Uncertainty
Songyou Peng and Peter Sturm
ICCV 2019 (Oral)

If you find our code or paper useful, please consider citing

@inproceedings{peng2019iccv,
 author =  {Songyou Peng and Peter Sturm},
 title = {Calibration Wizard: A Guidance System for Camera Calibration Based on Modelling Geometric and Corner Uncertainty},
 booktitle = {IEEE International Conference on Computer Vision (ICCV)},
 year = {2019},
}

Installation

Requirements

CMake
OpenCV
MATLAB

Build

git clone https://github.com/pengsongyou/CalibrationWizard
cd CalibrationWizard
mkdir build
cd build
cmake ..
make

Tested working on Mac OSX, OpenCV 2.4.11 and MATLAB R2015b.

Usage

First step: run binary ./bin/CalibrationWizard and choose mode=0 to capture images freely for initial calibration. Press space to capture one image. After capturing, press ESC and the calibration is automatically done.
Second step: run src_matlab/main_estimate.m to estimate the next best pose.
Third step: run binary ./bin/CalibrationWizard again and choose mode=1. The estimated next pose should be displayed. You can try to overlay the checkerboard with the new pose, and press space to capture the image.

Loop over the second and third step until you are satisfied, or tired :)

Command Line Options

mode=0 captures images for initial camera calibration
mode=1 shows the next best pose for capturing

In addition, we provide mode=2 if you only want to perform calibration on all the captured images listed in out/images/image_list.xml.

TODO

Release codes of the unified system in C++ which integrates the next best pose estimation.

Extreme Poses

Sometimes the next pose is extreme so the checkerboard cannot be detected. Please consider:

Check if the values in the uncertainty map are low. If yes, then the calibration has more or less converged.
Consider autocorrelation matrix, simply set autoCorr_flag=1 in src_matlab/main_estimate.m.
Re-run src_matlab/main_estimate.m.

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