The bulk update request #13210 is pending approval.
create implication 1-bit (95) -> aliasing (11497)
change category 1-bit (95) -> meta
Reason: As the wiki page of 1-bit says:
A telltale sign that something is 1-bit rather than merely black and white is if there are jagged pixels, as there is no anti-aliasing or translucency to smooth out lines.
Similarly to aliasing, 1-bit also describes the image itself rather than its contents so it should be a meta tag.