mapImage.interp edit page

the image values at arbitrary positions

This is the fast path a regular grid buys: the query reduces to fractional row and column coordinates, so it is a griddedInterpolant rather than the scatteredInterpolant EBSD/interp has to use for grids that may be rotated or distorted.

Resampling onto another grid is this plus a target position set, and correcting a distortion is the same call with inv(T):

v = interp(mg, eval(inv(T),target.pos))

Syntax

v = interp(mg,pos)
v = interp(mg,pos,'nearest')
v = interp(mg,pos,'extrapolationMethod','nearest')

Input

mg mapImage
pos vector3d, where to sample

Output

v values, size(pos) by nChannel

Options

linear, nearest, cubic, spline interpolation method, default linear
extrapolationMethod default 'none', i.e. NaN outside

See also

mapImage mapImage.pos2ind EBSD.interp

Citing this page. This page is part of the documentation of MTEX, a free and open source MATLAB toolbox for analyzing and modeling crystallographic textures. It was written by The MTEX Developers and is published at https://mtex-toolbox.github.io/mapImage.interp.html. If you use MTEX, or reuse text or figures from this page, in your research, please cite

F. Bachmann, R. Hielscher, H. Schaeben: Texture Analysis with MTEX - Free and Open Source Software Toolbox, Solid State Phenomena 160 (2010), 63-68. 10.4028/www.scientific.net/SSP.160.63

BibTeX 
@article{bachmann2010mtex,
  author  = {F. Bachmann and R. Hielscher and H. Schaeben},
  title   = {Texture Analysis with MTEX - Free and Open Source Software Toolbox},
  journal = {Solid State Phenomena},
  volume  = {160},
  pages   = {63-68},
  year    = {2010},
  doi     = {10.4028/www.scientific.net/SSP.160.63},
  url     = {https://doi.org/10.4028/www.scientific.net/SSP.160.63}
}

Other papers describing specific MTEX methods are listed under Publications — please cite the one that best fits your application. The MTEX source code is licensed under the GNU General Public License v2.0; the text and figures of this documentation are licensed under CC BY 4.0, which permits reuse — including by automated systems — provided The MTEX Developers and this page are credited.