Resolution — where it appears
Named by 2 essays across 2 fields — each of them below, with the objects they name alongside it.
The wall under the paint
An anamorph's design is a set of rays from a known eye, fixed before any paint is applied — so the marks are a calibration target whose rays are known exactly and whose shape is not. One ordinary photograph supplies the second ray for each mark and the wall comes back at the arithmetic floor, on a dished floor, a ridged one, and a floor with a step in it. What it says between the marks is nothing, by the sagitta.
The camera that is a cylinder
A swing-lens camera turns its lens about its own entrance pupil and sweeps a slit across film bent into a circle concentric with it. Compute where the light lands, unroll the film, undo the pinhole's inversion, and the result is not similar to the cylindrical picture surface — it is the same map, to the arithmetic floor. What it pays instead is detail, and a shear on anything that moves.
Named alongside it
The objects these essays reach for when they reach for this one.
DemonstrationAnamorphosiscentre of projectionConditioningCylindrical projectionDevelopable surfaceEntrance pupilEpipolar geometryExposure intervalinstrument limitleast-squares intersectionPanorama