bugGNU Octave - Bugs: bug #66148, [octave forge] (image) Add...

 
 

bug #66148: [octave forge] (image) Add imbinarize() function for replacement of im2bw() function

Submitter:  Yu Hongbo <yuhongbo>
Submitted:  Fri 30 Aug 2024 02:02:14 PM UTC
   
 
Category:  Octave Package Severity:  1 - Wish
Priority:  3 - Low Item Group:  Feature Request
Status:  Confirmed Assigned to:  avinoam
Originator Name:  Open/Closed:  * Open
Release:  * other Operating System:  * Any
Fixed Release:  None Planned Release:  None
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Mon 09 Sep 2024 08:24:13 PM UTC, comment #8: 

Yes, I'd also love to see an imbinarize function in the image package. But I haven't found the time to implement it myself in the last years, yet. And yes, please keep im2bw as well.

 Hartmut <hardy>
Sat 31 Aug 2024 12:31:17 PM UTC, comment #7: 

Thanks. Of course

 Avinoam Kalma <avinoam>
Group Member
Sat 31 Aug 2024 10:05:41 AM UTC, comment #6: 

I don't have anything to add. But when you add imbinarize please don't remove im2bw.

 Carnë Draug <carandraug>
Group Member
Sat 31 Aug 2024 09:35:18 AM UTC, comment #5: 

Adding stakeholders

 Avinoam Kalma <avinoam>
Group Member
Sat 31 Aug 2024 09:34:25 AM UTC, comment #4: 

imbinarize is a very useful function, and it is my to-do list for a long time.

I will write it (don't hold your breath, it will take some time)

 Avinoam Kalma <avinoam>
Group Member
Sat 31 Aug 2024 07:13:16 AM UTC, comment #3: 


imbinarize() function has another restriction: the im has to be a grayscale image matrix, so the workaround is:

> function bw = imbinarize (im)
>   if (!isgray (im))
>       error('im should be grayscale image')
>   endif
>   threshold = graythresh (im);
>   bw = im2bw (im, threshold);
> endfunction

 Yu Hongbo <yuhongbo>
Fri 30 Aug 2024 02:38:04 PM UTC, comment #2: 

e.g., does the following function produce the simplest expected output?


function bw = imbinarize (im)
  threshold = graythresh (im);
  bw = im2bw (im, threshold);
endfunction

 Nicholas Jankowski <nrjank>
Group Member
Fri 30 Aug 2024 02:25:09 PM UTC, comment #1: 

the matlab help for im2bw suggests that


thresh = graythresh(I);
BW = im2bw(I,thresh);


is a workaround to emulate:

BW = imbinarize(I);


until a compatible imbinarize function is implemented.  Are there other imbinarize features you need immediately? it may be that other workarounds, or possibly even a placeholder wrapper function, could be implemented for those features.

 Nicholas Jankowski <nrjank>
Group Member
Fri 30 Aug 2024 02:02:14 PM UTC, original submission:  

Matlab added imbinarize() function for replacement of im2bw() function, and im2bw() function is deprecated now.
In #66107, what I really need is imbinarize() function.

 Yu Hongbo <yuhongbo>

 

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    Follow 8 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2024-08-31 avinoam Carbon-Copy- Added hardy
        Carbon-Copy- Added carandraug
    2024-08-31 avinoam StatusNone Confirmed
        Assigned toNone avinoam
    2024-08-30 nrjank CategoryOctave Function Octave Package
        Severity3 - Normal 1 - Wish
        Priority5 - Normal 3 - Low
        Releasedev other

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