Comments on: A new look for connected component labeling in R2009a http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/ 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/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-24624 Steve Fri, 11 Nov 2011 22:13:19 +0000 http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-24624 Suyun—If you have the Image Processing Toolbox, type this: <pre class="code"> edit labelmatrix </pre> Suyun—If you have the Image Processing Toolbox, type this:

edit labelmatrix
]]> By: Suyun Ju http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-24612 Suyun Ju Wed, 09 Nov 2011 01:51:16 +0000 http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-24612 Hello, This is Suyun Now I am studying about Blob Labeling using Matlab. I would like to see the original source code of "labelmatrix" It is possible to see this code?? Please help me. Hello, This is Suyun

Now I am studying about Blob Labeling using Matlab.

I would like to see the original source code of “labelmatrix”

It is possible to see this code??

Please help me.

]]> By: Steve http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-22618 Steve Fri, 15 Jan 2010 19:17:27 +0000 http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-22618 Saber—The concept of convex hull is well described in many, many places. You could just start with Wikipedia for that. Eccentricity, MajorAxisLength, MinorAxisLength, and Orientation are all based on fitting an ellipse to the region by matching second-order moments. Equations were drawn from Haralick and Shapiro, Computer and Robot Vision vol I, Addison-Wesley 1992, Appendix A. See the subfunction ComputeEllipseParams in regionprops.m. Saber—The concept of convex hull is well described in many, many places. You could just start with Wikipedia for that. Eccentricity, MajorAxisLength, MinorAxisLength, and Orientation are all based on fitting an ellipse to the region by matching second-order moments. Equations were drawn from Haralick and Shapiro, Computer and Robot Vision vol I, Addison-Wesley 1992, Appendix A. See the subfunction ComputeEllipseParams in regionprops.m.

]]> By: Saber http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-22616 Saber Fri, 15 Jan 2010 17:17:45 +0000 http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-22616 Hi Steve, First of all, thanks a lot for your posts on image processing, I really learned a lot through this blog. Secondly, could you please refer me to the theory (e.g. papers or articles) upon which REGIONPROPS features like: - ConvexHull - Eccentricity - Major-, MinorAxisLength - Orientation are implemented. Best regards Hi Steve,
First of all, thanks a lot for your posts on image processing, I really learned a lot through this blog.
Secondly, could you please refer me to the theory (e.g. papers or articles) upon which REGIONPROPS features like:
– ConvexHull
– Eccentricity
– Major-, MinorAxisLength
– Orientation
are implemented.
Best regards

]]> By: Steve http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-22078 Steve Mon, 31 Aug 2009 12:23:15 +0000 http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-22078 Ahmed—You need to break down your code a line at a time, looking carefully at each output to see if it matches your expectations. For example, what is the number of elements in the output of bwconncomp? That will tell you how many objects it detected. Ahmed—You need to break down your code a line at a time, looking carefully at each output to see if it matches your expectations. For example, what is the number of elements in the output of bwconncomp? That will tell you how many objects it detected.

]]> By: Ahmed Mostafa http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-22066 Ahmed Mostafa Wed, 19 Aug 2009 00:56:12 +0000 http://blogs.mathworks.com/steve/2009/07/06/a-new-look-for-connected-component-labeling-in-r2009a/#comment-22066 Hello Steve i really like your articles, it helped me a lot through my study. i kinda have a problem with bwconncomp and isosurface, it will be great if you can have time to look at it http://www.mathworks.com/matlabcentral/newsreader/view_thread/258281#672407 Thanks Hello Steve
i really like your articles, it helped me a lot through my study. i kinda have a problem with bwconncomp and isosurface, it will be great if you can have time to look at it

http://www.mathworks.com/matlabcentral/newsreader/view_thread/258281#672407

Thanks

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