This tag indicates that an image sourced from nicoseiga is sampled, and is not the original image.
Nicoseiga post pages have the following characteristics:
URL: http://seiga.nicovideo.jp/seiga/im<image ID>
Preview: http://lohas.nicoseiga.jp/thumb/<image ID>i?
Link: http://seiga.nicovideo.jp/image/source/<image ID>
Fullsize: http://lohas.nicoseiga.jp/priv/.../.../<image ID>
Other Nicoseiga Errors
- Bad Nicoseiga ID: for when any Nicoseiga post or picture are no longer publicly available
- MD5 mismatch: for when none of the sizes match Danbooru