A method of spatialTransformDrift.

a drift along the slow scan direction, the linear spline through the median displacement of every scan line

Syntax

T = spatialTransformDrift.fit(posA, posB)

Scan lines along x.

T = spatialTransformDrift.fit(posA, posB, slowScan=xvector)

Scan lines along y.

T = spatialTransformDrift.fit(posA, posB, extrapolate=True)

Continued beyond the lines.

Description

The points of one scan line share their coordinate along the slow scan direction, up to rounding; each line becomes a knot with the median displacement of its points. The median rather than the mean: a line crossing a badly correlated patch is not pulled by it. The weights only drop the points whose weight is not a number, since one number per line leaves nothing for them to outvote; a weight zero is kept, as MATLAB keeps it.

Input

posA vector3d, the positions in the first frame
posB vector3d, where they went in the second, one for each

Keywords

keyword default description
weights None array, a weight per point pair; not a number drops a point
slowScan None vector3d, the slow scan direction, by default y
extrapolate False continue the end segments beyond the first and last line, where the drift is otherwise NaN

Output

T spatialTransformDrift, a knot per scan line

See also

spatialTransformPoly.fit, spatialTransformField, transform

source

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/spatialTransformDrift.fit_py.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.