Rectification

Rectification has the following technical meanings:

Mathematics

Rectification (geometry), truncating a polytope by marking the midpoints of all its edges, and cutting off its vertices at those points
Rectifiable curve, in mathematics
Rectifiable set, in mathematics

Image rectification, adjustment of images to simplify stereo vision or to map images to a map coordinate system (GIS)
The function of a rectifier, a device that converts alternating electrical current to direct current
Rectified airspeed, a means of displaying the airspeed of high-speed aircraft
Rectification (chemical/process engineering), countercurrent distillation, a unit operation also used for the production of rectified spirit (see Distillation#Fractional distillation)

Rectification (law), an equitable legal remedy whereby a court orders a change in a written document to reflect what it should have said in the first place
Rectification, in astrology, "rectification of the birth time" is used when natal birth time is imprecise
Rectification movement (disambiguation)
Rectification of names (zhèngmíng), a practice in Confucian philosophy
Rectification, a process that creates a rectified spirit (alcohol)