Paper and scanner¶

Four themes describe what surrounds the text: paper (the sheet), stains (marks on the sheet and on the scanner glass), edges (lighting) and scanner (transfer artefacts). They are drawn as page background and foreground images.

Paper¶

#show: lookscanned.scan.with(
  preset: "office-scan",
  paper: (color: rgb("#f4efe4"), grain: 0.5, aging: 0.4, fibers: 0.4),
)

Key	Effect
`color`	Base colour of the sheet. Also used as the target colour of ink fading.
`grain`	Fine noise and low-frequency mottling.
`aging`	Yellowing, stronger towards the edges, and foxing (small rust-coloured spots, quadratic in `aging`).
`fibers`	Short paper fibres.

aging 0, 0.3, 0.6, 1

Stains, dust and scratches¶

#show: lookscanned.scan.with(
  preset: "office-scan",
  stains: (
    color: rgb("#8b5a2b"),
    amount: 0.4,
    size: (min: 5mm, max: 25mm),
    dust: 0.6,
    scratches: 0.3,
  ),
)

Key	Effect
`amount`	Density of stains per page, scaled by page area relative to A4. Each stain is a blotch, a ring or a splatter.
`color`	Stain colour: brown for coffee, grey for toner, blue for ink.
`size`	Range of diameters.
`dust`	Specks and hairs on the glass, drawn above the text.
`scratches`	Long faint lines, mostly vertical.

To place a single stain at a given position, use stain.

Lighting¶

#show: lookscanned.scan.with(
  preset: "office-scan",
  edges: (shadow: 0.6, vignette: 0.4, uneven: 0.3, binding: true, punch-holes: true),
)

Key	Effect
`shadow`	Dark borders where the sheet does not lie flat. One side, chosen from the seed, dominates.
`vignette`	Darker corners.
`uneven`	Light falling off from one side, as in a phone photograph.
`binding`	Gutter shadow along the left edge of a bound volume.
`punch-holes`	Two filing holes on the left edge (ISO 838: 6 mm, 80 mm apart, centred 12 mm from the edge).

Scanner artefacts¶

#show: lookscanned.scan.with(preset: "office-scan", scanner: (lines: 0.5, bands: 0.4))

Key	Effect
`lines`	Fax transmission: thin horizontal dark lines and white dropouts.
`bands`	Photocopier: soft vertical bands and a few drum streaks.

Pages without a fixed height¶

Page-sized textures need the page height. With #set page(height: auto), only the paper colour and the tiled grain are drawn; mottling, ageing, stains, dust, lighting and scanner artefacts are skipped.