Editing Trilinear interpolation (section)

{{short description|Method of multivariate interpolation on a 3-dimensional regular grid}}
{{No footnotes|date=October 2024}}
[[Image:3D_interpolation2.svg|right|thumb|Trilinear interpolation as two [[bilinear interpolation]]s followed by a [[linear interpolation]].]]

'''Trilinear interpolation''' is a method of [[multivariate interpolation]] on a [[Three dimensional space|3-dimensional]] [[regular grid]].  It approximates the value of a function at an intermediate point <math>(x, y, z)</math> within the local axial rectangular [[prism (geometry)|prism]] linearly, using function data on the lattice points. 
Trilinear interpolation is frequently used in [[numerical analysis]], [[data analysis]], and [[computer graphics]].