[Scilab-users] need help with image post processing

[P M]

Stéphane,

Thanks for the hint.

This is nice for dots being completely surrounded by the green area.

In general there might be cases, where the dots are part of the red and
part of the green area.

The result would than be like this:

[image: grafik.png]

Appreciate your input.
Philipp

Am Mi., 15. Juli 2020 um 18:21 Uhr schrieb Stéphane Mottelet <
stephane.mottelet at utc.fr>:

> Hello,
>
> Maybe this is not relevant, but if the green region is garanteed to be
> always simply connected, you just have to fill holes in your absdiff(G,B)
> image (imfill function in IPCV).
>
> S.
>
>
> Le 15/07/2020 à 17:58, P M a écrit :
>
> Dear Scilab community,
>
> Thanks to Antoine's functions I am able to read tif-files as M x N x
> Channel - matrix.
>
> Px values are:
>
> red       =>  255, 0, 0
> green    =>  0, 255, 0
> black     =>  0, 0, 0
> white     =>  255, 255, 255
>
> Now:   I want to only keep the green pixel values.
> This can be done due to:  G = img(:,:,2);
>
> However, this plane does also include the white pixels, since white has a
> pixel value of 255 in the green plane.
> This is Ok, as long as the white pixels are surrounded by the green area.
>
> However there are also white pixels in the red and black area.
> These white pixels should be set to 0.
>
> I started to work with differential images , but somehow I can not get
> around the problem.
>
> Please find below an example of my output.
>
> upper line:    RGB; R-plane; G-plane ; B-plane
>
> As you can see, the G-plane contains white pixel (2 dots), which are
> within the red-area
> The desired output would be to have the G-plane without the 2 dots.
>
> Any Idea?
>
> Best Regards,
> Philipp
>
>
>
> [image: grafik.png]
>
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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)344234688http://www.utc.fr/~mottelet
>
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