Depth division — where it appears
Named by 2 essays across 2 fields — each of them below, with the objects they name alongside it.
Dividing depth by eye
Three methods for spacing a receding row, all of them taught, all of them wrong. Read back as distances, the best misplaces a post by 3.5 metres in a row that is supposed to be spaced 1.4. And the obvious way of checking them gives one of the three a perfect score.
A texture does not interpolate on the page
Walking across a drawn surface at a constant rate walks across the real one at a rate that changes, and the worst gap is a closed form in the depth ratio alone — 0.52 at ten to one, more than half the whole range. It is exactly the error a person makes dividing depth by eye, made by a machine, and the fix is the fourth coordinate the pipeline kept.
Named alongside it
The objects these essays reach for when they reach for this one.
Camera matrixClip spaceCross ratioCross ratio testDemonstrationDiminutionForeshorteningHomogeneous coordinatesHorizonInverse projectionMeasuring pointMidpoint