RAW_CANON_5DMARK2_PREPROD.CR2, RAW_CANON_40D_SRAW_V103.CR2, RAW_SIGMA_SD9_SRGB.X3F, RAW_KODAK_DC50.KDC were downloaded
from https://www.rawsamples.ch and are licensed under CC BY-NC-SA 4.0
(https://creativecommons.org/licenses/by-nc-sa/4.0/).