Top tips to get the best photo:
1) Put the paper on a flat mat/ chopping board and lift it at 45 degrees to take the photo so you don't get shadows from your phone.
2) Once taken - Boost the exposure to max to make the background as white as possible. (on iPhone find the the image in the Photos app after you have taken it > click the three lines at the bottom next to the (i) symbol > Adjust > Exposure)
3) Crop to square aiming to remove the border
