X3F
Kalpanika/x3f
なおしてる →
https://github.com/polamjag/x3f
フォーマット
https://gae.hatenablog.com/entry/20111122/1321985743
https://www.tsukune.org/skk/x3f/
http://web.archive.org/web/20080119134639/http://www.photofo.com/x3f-raw-format/
http://web.archive.org/web/20080727015707/http://www.photofo.com/downloads/x3f-raw-format.pdf