stretch the values of one or more images to a common range
Cross correlation compares two pictures that came off different detectors, so their absolute levels mean nothing to each other. Putting them on one range is the usual first step.
Each image is rescaled on its own, and every channel of it together, so the colour balance of a multi channel image is preserved.
Description
Non finite values are ignored when the range is measured and left alone afterwards, so the padding an earlier resampling left behind neither skews the result nor becomes a number.
A flat image has no range to stretch and is returned unchanged rather than divided by zero.
Syntax
mg = rescale(mg) % to [0,1]
mg = rescale(mg,lo,hi)
mg = rescale(mg,'perChannel')Input
| mg | mapImage, one or an array |
| lo, hi | target range, default 0 and 1 |
Output
| mg | the same images, rescaled |
Flags
| perChannel | rescale each channel separately rather than together |
See also
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.rescale.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.