http://blogs.mathworks.com/steve/2008/06/13/performance-optimization-for-applylut/ 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 http://blogs.mathworks.com/steve/2008/06/13/performance-optimization-for-applylut/#comment-20803 Steve Mon, 16 Jun 2008 13:42:10 +0000 http://blogs.mathworks.com/steve/2008/06/13/performance-optimization-for-applylut/#comment-20803 Pete—I'm glad the improvements made a difference to you. I remembered that the <tt>applylut</tt> optimization was not the only factor involved in speeding up the <tt>'thin'</tt> option of <tt>bwmorph</tt>. I'll add a clarifying note in the post. Pete—I’m glad the improvements made a difference to you. I remembered that the applylut optimization was not the only factor involved in speeding up the 'thin' option of bwmorph. I’ll add a clarifying note in the post.

]]> http://blogs.mathworks.com/steve/2008/06/13/performance-optimization-for-applylut/#comment-20797 Pete Mon, 16 Jun 2008 01:19:04 +0000 http://blogs.mathworks.com/steve/2008/06/13/performance-optimization-for-applylut/#comment-20797 I remember when R2007b arrived... I was new to MATLAB and in the middle of a project that would have involved a thinning stage, except that thinning with bwmorph was too slow (taking several seconds). I was quite pleased to finally come up with a convoluted workaround that did what I needed using bwulterode, until R2007b came along and made the workaround redundant. I was very curious at the time as to how such drastic improvements in bwmorph could have been achieved. It's nice to finally know, and I'm glad you had that light bulb moment. I remember when R2007b arrived… I was new to MATLAB and in the middle of a project that would have involved a thinning stage, except that thinning with bwmorph was too slow (taking several seconds). I was quite pleased to finally come up with a convoluted workaround that did what I needed using bwulterode, until R2007b came along and made the workaround redundant.
I was very curious at the time as to how such drastic improvements in bwmorph could have been achieved. It’s nice to finally know, and I’m glad you had that light bulb moment.

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