How to collect the data for your own android devices is illustrated here.

1. prepare your camera as follows:

2. Calibrate the environment illuminance

• Download the Android Debug Bridge (ADB) to your laplop, and link your camera with your laptop.

• Please ensure ADB is in the system parameters of your laptop.

• Shooting the pure white scene by:

python data_capture.py -n 1 -t 1.5

• Pull the raw whiteboard image from camera to your laptop:

adb pull ~/DCIM/Camera/whiteboard.dng ~/whiteboard

• Download the dcraw and ensure dcraw is in the system parameters.

• Postprocessing the captured whiteboard raw image with dcraw:

dcraw -v -4 -T -w -n 300 -q 3 -o 0 ~/whiteboard/whiteboard.dng

• Calibrate the environment illuminance:

python env_illuminance.py -i ~/whiteboard/whiteboard.tiff -o ~/env_illu.mat -p 100

3. Checkerboard capture and postprocessing

• Capture the checkerboard by:

python data_capture.py -n 7 -t 1.5

• Pull the raw image from camera to your laptop:

adb pull -r ~/DCIM/Camera/*.dng ~/rawdata

• Postprocessing the captured raw images by:

python post_processing.py -i ~/rawdata -n 7 -e ~/env_illu.mat -d 1.0

The 16-bit image is saved in the same directory of rawdata, named with "*_out.tiff"