[Scilab-users] {EXT} How to count pixels

[Stéphane Mottelet]

Le 05/06/2019 à 11:20, Jean-Philippe Grivet a écrit :
> Hello,
>
> I am mainly interested in obtaining the ratio (number of white 
> pixels)/(number of black pixels), so that units are not of primary 
> interest.
>
Ok. So it is completely size/scale dependent and has to be done on the 
bitmap image. Besides exporting the figure then reloading with imread 
(present e.g. in IPCV Atoms module) I don't see other solutions.

S.

> Le 03/06/2019 à 15:21, Stéphane Mottelet a écrit :
>> Le 03/06/2019 à 14:56, Jean-Philippe Grivet a écrit :
>>> My thanks to all respondants.
>>>
>>> The figure is in internal Scilab firmat made up of polylines., the 
>>> border is a polygon.
>> you did not say if you want to compute a surface in current units or 
>> really compute a surface in pixels
>>>
>>>
>>> Le 03/06/2019 à 12:47, Dang Ngoc Chan, Christophe a écrit :
>>>> Hello,
>>>>
>>>>> De : Jean-Philippe Grivet
>>>>> Envoyé : lundi 3 juin 2019 12:08
>>>>>
>>>>> Using Scilab (6.02/Win7), I have drawn a picure made up of thick 
>>>>> lines and
>>>>> arcs, within a region with irregular borders.
>>>> What is the data structure of your picture?
>>>> A matrix of dots?
>>>> A Scilab figure containing polylines?
>>>>
>>>> -- 
>>>> Christophe Dang Ngoc Chan
>>>> Mechanical calculation engineer
>>>>
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-- 
Stéphane Mottelet
Ingénieur de recherche
EA 4297 Transformations Intégrées de la Matière Renouvelable
Département Génie des Procédés Industriels
Sorbonne Universités - Université de Technologie de Compiègne
CS 60319, 60203 Compiègne cedex
Tel : +33(0)344234688
http://www.utc.fr/~mottelet