Grzegorz MartensandClaude Opus 5.5 151ca1d6ad M11: monochrome downsampling: a tie goes to the dark sample, after the decode array ...

A 2 × 2 tie always gave sample 0, black in grey and the painted part of
an image mask with the default decode array. With an inverting one,
[1 0], 0 is white or unpainted, and in a separation 0 is no ink, so a
line half a new pixel wide could vanish. dark_is_one says which sample
is dark from the colour space and decode array: 0 in grey and of a
mask, 1 in a separation or a DeviceN of one colourant, each the other
way round when the decode array inverts; an indexed image keeps entry
0, as its palette, not the decode array, says which is darker.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BfMGHQNgdq5yf5tKZHGR3z

2026-10-29 20:48:03 +01:00

..

acrobat-features.toml

M11: monochrome downsampling: a tie goes to the dark sample, after the decode array

2026-10-29 20:48:03 +01:00