Comments on: What happened to isgray, isind, isbw, and isrgb? http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/ Steve Eddins manages the Image & Geospatial development team at <a href="http://www.mathworks.com/">The MathWorks</a> and coauthored <a href="http://www.mathworks.com/support/books/book5291.html?category=-1&language=-1">Digital Image Processing Using MATLAB</a>. He writes here about image processing concepts, algorithm implementations, and MATLAB.<br><br><img> Sun, 22 Nov 2009 22:58:57 +0000 http://wordpress.org/?v=2.3.1 By: Pratyusha http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-21136 Pratyusha Wed, 08 Oct 2008 19:12:51 +0000 http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-21136 Thank you..! Thank you..!

]]> By: Steve http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-21132 Steve Wed, 08 Oct 2008 13:08:11 +0000 http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-21132 Pratyusha—Use <tt>rgb2gray</tt>. That hasn't changed. Pratyusha—Use rgb2gray. That hasn’t changed.

]]> By: Pratyusha http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-21131 Pratyusha Tue, 07 Oct 2008 23:33:21 +0000 http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-21131 Hi Steve, Since isrgb isnt working anymore, how do we convert an RGB image into Intensity or gray scale image now? It is not given in the HELP of Matlab 7.1 that I'm using. Could you please help me with that? Thanks! Hi Steve,

Since isrgb isnt working anymore, how do we convert an RGB image into Intensity or gray scale image now?
It is not given in the HELP of Matlab 7.1 that I’m using.
Could you please help me with that?

Thanks!

]]> By: Steve http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6768 Steve Thu, 14 Jun 2007 18:17:45 +0000 http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6768 Hanaa - I don't have information on those terms and operations. May I suggest that you use libraries, journals, books, and Internet searches? Hanaa - I don’t have information on those terms and operations. May I suggest that you use libraries, journals, books, and Internet searches?

]]> By: hanaa saleh http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6767 hanaa saleh Thu, 14 Jun 2007 17:28:40 +0000 http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6767 i mant to perform the ambiguity function on thr evoked potential of EEG signals and use fisher contrast for classification how i find ambiguity function and fisher contrast and perform them on matlab i mant to perform the ambiguity function on thr evoked potential of EEG signals and use fisher contrast for classification how i find ambiguity function and fisher contrast and perform them on matlab

]]> By: Steve http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6685 Steve Wed, 02 May 2007 12:20:56 +0000 http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6685 James - I'm sorry, but I don't understand your question. It it about image processing, and can you be much more specific? James - I’m sorry, but I don’t understand your question. It it about image processing, and can you be much more specific?

]]> By: james http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6684 james Wed, 02 May 2007 10:44:24 +0000 http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6684 Hi steve I have a request when I have several 3D cordinate How I can recive equation of that coordinate Thanks Hi steve I have a request
when I have several 3D cordinate
How I can recive equation of that coordinate
Thanks

]]> By: samar damlakhi http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6575 samar damlakhi Mon, 12 Mar 2007 08:38:04 +0000 http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6575 Dear Mr.Eddins I am a self_learning about matlab (image toolbox), i am working on roots of the olive to constract the sub_branchs and main_branchs (length_width)after doing a perfect thresholding to work on binary images i will really aprciate if you let me in contact while i'm preparing my algorithms for the roots Best Regards Dear Mr.Eddins
I am a self_learning about matlab (image toolbox),
i am working on roots of the olive to constract the sub_branchs and main_branchs (length_width)after doing a perfect thresholding to work on binary images
i will really aprciate if you let me in contact while i’m preparing my algorithms for the roots
Best Regards

]]> By: Rob http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6574 Rob Mon, 12 Mar 2007 02:54:53 +0000 http://blogs.mathworks.com/steve/2007/03/09/what-happened-to-isgray-isind-isbw-and-isrgb/#comment-6574 Steve, Thanks for the explanation of how the is* functions evolved, and the lessons you learned from them. That is exactly what I had in mind when requesting to know "what they were thinking" when decisions like these are often made. Makes sense, and I'll be using imfinfo now instead of testing whole matrices. I was aware of the false positives you could get from them, but honestly had not considered the speed impact. Regards, Rob Steve,

Thanks for the explanation of how the is* functions evolved, and the lessons you learned from them. That is exactly what I had in mind when requesting to know “what they were thinking” when decisions like these are often made. Makes sense, and I’ll be using imfinfo now instead of testing whole matrices. I was aware of the false positives you could get from them, but honestly had not considered the speed impact.

Regards,
Rob

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