Translating Multi-Otsu Threshold from java

[Alexandre Fioravante de Siqueira]

Hi all,
I am having a bad time trying to correct the first version of this code.
The values from my function and Tosa's does not match. In my tests, my maxSigma 
is higher than his; I believe I am having a problem with the values 
returned from the histogram.
Could you give me a hand on that? This is the code so far:
https://github.com/alexandrejaguar/software/blob/master/threshold_multiotsu.py
Thanks for your time!
Kind regards,

Alex

Em segunda-feira, 9 de maio de 2016 19:06:46 UTC+2, Alexandre Fioravante de 
Siqueira escreveu:
>
> Done (for now): https://github.com/scikit-image/scikit-image/pull/2076.
>
> Em segunda-feira, 9 de maio de 2016 12:14:59 UTC+2, Alexandre Fioravante 
> de Siqueira escreveu:
>>
>> Hi all,
>> the preliminary code is ready, but it could be improved a lot. For 
>> instance, there's a function named maxsigma() which has a lot of nested for 
>> loops.
>> Here is the code:
>> https://gist.github.com/alexandrejaguar/fd767149b3a667f8be125734893f020d
>> Could you give me a hand to improve that?
>> Thank you very much!
>> Kind regards,
>>
>> Alex
>>
>> Em domingo, 8 de maio de 2016 17:20:31 UTC+2, Alexandre Fioravante de 
>> Siqueira escreveu:
>>>
>>> Hi Josh,
>>> OK, I'm on it. I'll try to implement from the paper.
>>>
>>> Alex
>>>
>>> Em quarta-feira, 4 de maio de 2016 01:34:38 UTC+2, Josh Warner escreveu:
>>>>
>>>> We do have Otsu, and I think it would be within the scope of 
>>>> scikit-image. 
>>>>
>>>> I think I'd find use for this, personally, and depending on the 
>>>> implementation you may be able to reuse code from simple binary Otsu 
>>>> internally.
>>>>
>>>> Seems reasonable - PR would be welcome!
>>>>
>>>> Josh
>>>>
>>>> On Tuesday, May 3, 2016 at 10:47:00 AM UTC-5, Alexandre Fioravante de 
>>>> Siqueira wrote:
>>>>>
>>>>> Hi everyone,
>>>>> I was thinking about using multi-Otsu thresholding for some research. 
>>>>> I am used to use the ImageJ available plugin, 
>>>>> http://imagej.net/Multi_Otsu_Threshold.
>>>>> Could you give me a hand on writing such a function which could do 
>>>>> this for python? Maybe putting it into scikit-image. Or else, could you 
>>>>> point me a better alternative?
>>>>> Thank you very much!
>>>>>
>>>>> Alex
>>>>>
>>>>
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