Author: Long Qian

Date: 2017-02-01

This repository contains camera calibration file of HoloLens front-facing camera, with the 896x504 configuration. Please refer to Locatable Camera in Unity about how to obtain chessboard images from your own HoloLens.

The folder near contains calibration images collected from HoloLens and the calibration results of it. The calibration pattern for near range calibration is (7x5, 30cm). The images are taken from a distance of about 0.3m to 0.5m.

The folder far contains the calibration images and results of HoloLens, with distance of about 1m to 1.5m. The calibration pattern configuration is (11x7, 45cm).

• calibrate.py and common.py are adapted from OpenCV project. Example usage is:

python calibrate.py --square_size 0.03 --pattern_width 7 --pattern_height 5 data1/raw/*.jpg

• cv2.CALIB_FIX_K3 flag is set for function cv2.calibrateCamera in order for consistent adpation to ARToolKit camera parameter.
• scripts/ARToolKitCalibrationFileGenerator.cpp generates binary camera calibration file for ARToolKit. You need to correctly include the header files of ARToolKit and link to ARToolKit libraries.
• scripts/ARToolKitCalibrationFileReader.py makes your life easier when you want to see the values of an ARToolKit calibration file, and modify them.

• hololens896x504.json and hololens896x504.yaml are the camera calibration files of OpenCV format.
• hololens896x504.dat is the calibration file of HoloLens camera, for ARToolKit.