Re: Selecting elements in an image based on area

[Samuel Setchell]

I think I have grabbed one designed for MATLAB....which had been ported for 
mac. 
I have attempted "pkg install image-1.0.14.tar.gz" and got a few errors as 
listed below:

'make' returned the following error: 
error: called from `pkg>configure_make' in file 
/Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/pkg/pkg.m near 
line 1253, column 2
error: called from:
error:   
/Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/pkg/pkg.m at 
line 714, column 5
error:   
/Applications/Octave.app/Contents/Resources/share/octave/3.2.3/m/pkg/pkg.m at 
line 287, column 7

What I had been doing was taking the .m files from the image-1.0.14/inst folder 
and moving them into a working folder to use in Octave. However as i mention 
the "mybwlabel.m" file found at:

http://www.inf.ed.ac.uk/teaching/courses/ivr/MATLAB/FLATPARTRECOG/mybwlabel.m

seems to work fine. I tried running regionprops.m on my output and got:

ans =
{
  1x381 struct array containing the fields:

    Area
    Centroid
    BoundingBox
}

Is this correct? Im sorry if im not proving enough information or making stupid 
errors, i'm very new to MATLAB/Octave and completely self taught. Trying to 
learn what I need to complete my MSc dissertation in Geography!

Cheers

Sam  


On 13 Jul 2011, at 16:08, Jordi Gutiérrez Hermoso wrote:

> 2011/7/13 Jordi Gutiérrez Hermoso <address@hidden>:
>> 2011/7/10 Samuel Setchell <address@hidden>:
>>> These are the errors I receive when trying to call bwlabel.m :
>>> 
>>> octave-3.2.3:43> label=bwlabel(top)
>>> parse error near line 44 of file /Users/samsetchell/Desktop/BER10/bwlabel.m
>>> 
>>>  syntax error
>>> 
>>>>>> function [im2,npix,bb] = bwlabel(im,...)
>>>                                       ^
>>> 
>>> parse error near line 44 of file /Users/samsetchell/Desktop/BER10/bwlabel.m
>>> 
>>>  invalid parameter list
>> 
>> This is very strange. Can you post the bwlabel.m file you're using?
>> Where did you acquire it? Also please post the code you're running.
> 
> Silly me, I just realised that Octave's bwlabel is an oct file, not an
> m-file. So you grabbed some bwlabel file from somewhere, not from
> Octave Forge's image package, and it doesn't work with Octave. Is that
> Matlab's bwlabel? It looks like you're using Mac OS X, is that right?
> Did you attempt to do "pkg install image-1.0.14.tar.gz" from Octave?
> Did it fail to compile?
> 
> I'm not sure what's the easiest way to get the Octave-Forge packages
> installed on Mac OS X. They me be already packaged by Fink or Macports
> or one of those, but I doubt it. Try to install it as described above
> and see how far along we get.
> 
> HTH,
> - Jordi G. H.