Where does registration collide?

The computational process of aligning two or more images of the same scene, taken at different times, from different viewpoints, or by different sensors, into a single common coordinate system, so that corresponding points fall on top of one another. Zitová and Flusser's 2003 survey Image registration methods: a survey set out the standard steps of feature detection, feature matching, transform estimation, and resampling, and distinguished rigid alignment from deformable warping that lets one image bend to fit another. The referent is a geometric transformation that maps one image onto another, judged by how well matched points overlap, and it has nothing to do with recording a right in a public register, choosing pipe organ stops, or logging births and deaths.[1]

Unit

One estimated transformation mapping a moving image onto a fixed one

Recovery means

Not applicable

Measured by

Scored by the overlap of matched landmarks or intensities, using metrics such as target registration error, mutual information, or Dice overlap

The official entering of a fact, a right, or an entity in a public register kept by an authority, which gives the recorded matter legal effect or public notice, as in land, trademark, or voter registration. Arruñada's 2003 study Property enforcement as organized consent analysed how a public property registry works by gathering the consent of the parties affected and publicising rights, so that later dealings rest on a secure and priority-ordered record. The referent is an administrative and legal act of entering something in an authoritative record, its value measured by the certainty and priority it confers. It is close in spirit to vital registration, which also files facts in an official record, but it differs entirely from aligning images or choosing pipe organ stops.[2]

Unit

One entry of a right or entity in an official register

Recovery means

Not applicable

Measured by

Assessed by the legal certainty, priority, and enforceability the entry confers, and by the register's coverage and reliability