The following bugs were just reported on the octave mailing list
---------- Forwarded message ---------- From: Marius Roets <[email protected]> Date: 10 May 2011 10:04 Subject: Image processing package - morphological functions To: Octave Help <[email protected]> Hi, I have a couple of questions regarding the image processing package's morphological functions. 1) imerode (and hence imopen and imclose) seems to zero pad the image before the transformation. Matlab does not do this. Example : octave:88> m5 = magic(5) m5 = 17 24 1 8 15 23 5 7 14 16 4 6 13 20 22 10 12 19 21 3 11 18 25 2 9 octave:89> se = [ 1 1 1 ] se = 1 1 1 octave:90> imerode(m5, se) ans = 0 1 1 1 0 0 5 5 7 0 0 4 6 13 0 0 10 12 3 0 0 11 2 2 0 and Matlab gives ans = 17 1 1 1 8 5 5 5 7 14 4 4 6 13 20 10 10 12 3 3 11 11 2 2 2 2) The strel function seems to missing. Not sure if the is part of image processing, but I can't find it anywhere in Octave forge. 3) These functions are very slow. Opening a 600x600 image using a disk shaped structuring element of radius 40 takes 356 seconds. Thanks Marius _______________________________________________ Help-octave mailing list [email protected] https://mailman.cae.wisc.edu/listinfo/help-octave ------------------------------------------------------------------------------ Achieve unprecedented app performance and reliability What every C/C++ and Fortran developer should know. Learn how Intel has extended the reach of its next-generation tools to help boost performance applications - inlcuding clusters. http://p.sf.net/sfu/intel-dev2devmay _______________________________________________ Octave-dev mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/octave-dev
