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Polar Coordinates Transform

pcimg=imgpolarcoord(img,radiu... IMGPOLARCOORD converts a given image from cartesian coordinates to polar
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4.5 | 9 ratings Rate this file 32 Downloads (last 30 days) File Size: 1.74 KB File ID: #16094

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Polar Coordinates Transform

by Javier Montoya

25 Aug 2007 (Updated 27 Aug 2007)

Polar Coordinates Transform

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File Information
Description	This script is used to transform a given image from cartesian coordinates to polar coordinates.
Required Products	Image Processing Toolbox
MATLAB release	MATLAB 7.0.4 (R14SP2)

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Everyone's Tags	cartesian(3), coordinates(2), polar coordinate system(2), polar coordinates(2), ut
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Comments and Ratings (12)
13 Nov 2012	Arkadi	excellent.
04 Apr 2012	Boris	There is an issue regarding the sampling with this approach. Since the code simply samples the closest value the result is heavily undersampled in some regions (r>>), while it is oversampled in others (r<<). It would be interesting to have a correct approach that satisfies signal processing criteria (e.g. smooth oversampled regions and grey values where undersampled black and white values come together.
15 Nov 2011	Aya Naguib
25 Oct 2011	Tom Lampert
15 Oct 2011	ji	great,except the typo.
05 Jul 2011	Catherine	Hi all why i couldn't plot the polar image??and the image figure keep showing non-stop
22 Apr 2011	Gavin Tan	Where is the function iapolarcoord ? This function is named as imgpolarcoord and it need three input.Is the other two inputs(radius and angle) don't need to enter?
07 Apr 2009	C. Chaya	Hi wahab -- %pcimg=iapolarcoord(im);-' %pcimg=impolarcoord(im); are both wrong. The name of the m-file is imgpolarcoord , so you use imgpolarcoord(im)
21 Mar 2009	wahab alaamri	%pcimg=iapolarcoord(im);-' it should be %pcimg=impolarcoord(im); % fpcimg=iapolarcoord(fim);'it should be % fpcimg=impolarcoord(fim); BOTH OF THEM DOES NOT WORK %pcimg=iapolarcoord(im);-' %pcimg=impolarcoord(im); ANY ONE KNOW THE CORRECT CODE??
20 Oct 2008	sarhat adam	no comments
13 Nov 2007	Ali Salem	It is an excellent code. I tested it. Thank you very much, and if you have other codes please upload them!! There is a typo in the example, at the third and fourth lines. %pcimg=iapolarcoord(im);-' it should be %pcimg=impolarcoord(im); % fpcimg=iapolarcoord(fim);'it should be % fpcimg=impolarcoord(fim);
13 Nov 2007	Ali Salem	It is an excellent code. I tested it. Thank you very much, and if you have other codes please upload them!! There is a typo in the example, at the third and fourth lines. %pcimg=iapolarcoord(im);-' %pcimg=impolarcoord(im); % fpcimg=iapolarcoord(fim);' % fpcimg=impolarcoord(fim);