Image Over Larger Matrix, Select ROI with resizeable window

Version 1.2.0.1 (1.27 MB) by Michael Chan
Illustrates how a smaller matrix may be 'brushed' against a larger one without overflowing.
3.0
(2)
760 Downloads
Updated 14 May 2025

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main executing reference usages:
[1] brushSmallerImageOverAnother.m
The objective is to illustrate how a smaller matrix may be 'brushed' against a larger one without overflowing.
Such operations are common in image processing.
If the smaller matrix is desired to start from the top left corner of the larger matrix, zero padding to the larger matrix may be an option. That is, given the smaller matrix, n by n, the larger matrix, m by m, has to be appended to a size of m + 2*(n-1) rows by m + 2*(n-1) columns.
[2] computeRegionalStatisticsOf_ROI
: brush a NxN window to compute the average value, variance, etc. of each region of interest (ROI).
* Caveat : Illustrative Purposes
If the demo has more elegant presentation, please do not hesitate to suggest and send feedback to author.
Thank you.
Regards,
Michael Chan JT

Cite As

Michael Chan (2025). Image Over Larger Matrix, Select ROI with resizeable window (https://uk.mathworks.com/matlabcentral/fileexchange/29337-image-over-larger-matrix-select-roi-with-resizeable-window), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2010a
Compatible with any release
Platform Compatibility
Windows macOS Linux
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Version Published Release Notes
1.2.0.1

.
1.2.0.0

Added a 2nd executing reference usage:
computeRegionalStatisticsOf_ROI.m
: brush a NxN window to compute the average value, variance, etc. of each region of interest (ROI).

1.1.0.0

trivial adjustment: uncommenting line 43 (for visual illustration):
pause(0.01)
1.0.0.0