selecting areas with same color

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selecting areas with same color

angelica cuevas
Hello ImageJ users,

I would ask for your help. I just started using ImageJ and so far I've use the plugin ObjectJ which has been really useful for my work.

I'm a biologist who's analyzing coloration in lizards.


Now I'm analysing some images of lizards and what i need to do is to select areas that present the same coloration and get a measurement out if them (area for example), I've been looking through some plugins but i haven't found one that help me with the task I wanna do. I need that the program recognizes all the parts in the image that present certain given colour and show me what it has selected, distinguish that from the background and get a number (area) of the selected part.

I would really appreciate any help

thanks a lot in advance!

Angelica

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Re: selecting areas with same color

Michael Schmid
Hi Angelica:

two possibilities:

For RGB Images, "Image>Adjust>Threshold" can select a color range. Beware,
it overwrites your image data unless you switch back to 'Original'

The Versatile Wand plugin has a 'non-contiguous' option that selects all
areas within the tolerance. You can click on the desired color our use the
current foreground (eyedropper color), if you want a well-defined
reference color. You can then use 'Measure' with 'Area' selected in the
Measurement options.
  http://imagejdocu.tudor.lu/doku.php?id=plugin:segmentation:versatile_wand:start


Michael

____________________________________________________________

On Fri, December 14, 2012 19:55, angelica cuevas wrote:

> Hello ImageJ users,
>
> I would ask for your help. I just started using ImageJ and so far I've use
> the plugin ObjectJ which has been really useful for my work.
>
> I'm a biologist who's analyzing coloration in lizards.
>
>
> Now I'm analysing some images of lizards and what i need to do is to
> select areas that present the same coloration and get a measurement out if
> them (area for example), I've been looking through some plugins but i
> haven't found one that help me with the task I wanna do. I need that the
> program recognizes all the parts in the image that present certain given
> colour and show me what it has selected, distinguish that from the
> background and get a number (area) of the selected part.
>
> I would really appreciate any help
>
> thanks a lot in advance!
>
> Angelica
>
> --
> ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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ImageJ mailing list: http://imagej.nih.gov/ij/list.html