Comments on: Clearing border components http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/ Steve Eddins manages the Image & Geospatial development team at The MathWorks and coauthored Digital Image Processing Using MATLAB. He writes here about image processing concepts, algorithm implementations, and MATLAB. Sat, 11 Feb 2012 18:27:50 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Steve http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-23223 Steve Sun, 27 Jun 2010 15:35:59 +0000 http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-23223 Beho—You would need to complement your image before using imclearborder so that the objects of interest are white instead of black. However, for your image the "elliptical shape in the middle" is actually part of a larger connected component of pixels that touches the border. Therefore imclearborder would get rid of that as well. I don't have a suggestion for you. Beho—You would need to complement your image before using imclearborder so that the objects of interest are white instead of black. However, for your image the “elliptical shape in the middle” is actually part of a larger connected component of pixels that touches the border. Therefore imclearborder would get rid of that as well. I don’t have a suggestion for you.

]]> By: Beho http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-23222 Beho Sat, 26 Jun 2010 19:45:06 +0000 http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-23222 Hello Steve, I tried to use this method on the picture I am working on, but it didn't change the pic at all. What do you recommend to use? http://drop.io/319wyii I need to show only the main elliptic shape in the middle. Thanks Steve Hello Steve,
I tried to use this method on the picture I am working on, but it didn’t change the pic at all.

What do you recommend to use?

http://drop.io/319wyii

I need to show only the main elliptic shape in the middle.

Thanks Steve

]]> By: jairp http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-20973 jairp Wed, 13 Aug 2008 16:26:58 +0000 http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-20973 Thanks a lot, Matlab Help file did not explain this function well enough for me to understand. Read your article and now I know thanks Thanks a lot,
Matlab Help file did not explain this function well enough for me to understand. Read your article and now I know
thanks

]]> By: Pancham Shukla http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-11350 Pancham Shukla Thu, 04 Oct 2007 15:09:33 +0000 http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-11350 This is quite useful function. This is quite useful function.

]]> By: Daphne http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-8937 Daphne Tue, 11 Sep 2007 09:58:59 +0000 http://blogs.mathworks.com/steve/2007/09/04/clearing-border-components/#comment-8937 Hi Steve, Found imclearborder very useful. I am now implementing the centroid code you had suggested in the blog to tracking particles in cells. Looks to be much, much faster than what I have now, but I haven't quantified yet. Being able to remove particles on the edges really helps, as those usually throw the centroid calculation off, which in turn will affect the trajectories that we collect. Thanks for the helpful blogs! Daphne Hi Steve,
Found imclearborder very useful. I am now implementing the centroid code you had suggested in the blog to tracking particles in cells. Looks to be much, much faster than what I have now, but I haven’t quantified yet.
Being able to remove particles on the edges really helps, as those usually throw the centroid calculation off, which in turn will affect the trajectories that we collect.
Thanks for the helpful blogs!
Daphne

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