Visual Plane
every picture states the point it is correct from
Series

Canon — the series

2 essays on one idea, from the one that introduces it to the one that assumes the rest.
  1. correct from 17 cm, at 160 mm wide21 squares tall · pitch 14.7 px

    A grid on the wall is a scale without a projection

    An Egyptian canon rules a wall into squares and counts a figure's height against the ruling — no horizon, no centre, and a length recovered to 1.4e-14% of error where the same reading taken off a pinhole misses by 58%. Applied instead to a pinhole picture, the furthest of six equal figures reads at 19% of its true height.

    part 1 · conventions
  2. 0.2500.5000.75010204060copies made, each from the one beforea landmark, as a share of the heightthin: no grid · thick: eighteen squareshand 0.8%

    A grid stops a copy drifting

    A figure copied by hand from the last copy drifts as a random walk, by the square root of the copies. Copied on a ruled grid, with each landmark brought back to a line, it does not drift at all, because rounding throws the error away. That is how a correcting code works. It holds only below a sharp threshold on the hand, and the grid's size is the trade between how much it corrects and how much it can say.

    part 2 · conventions

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