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black background

Sebastian Baumbach
Hey,

I just started working with imageJ.  I'd like to analyze pressure sensitive film, meaning i got a a sample with pressure coded in different magenta intensities.

Is the templates are not completely white, i have created a binary mask and subtracted it from the original image, resulting in a image with a black background and only the areas with magenta left intact.

I would now like turn the black background into a white one in order to be able to analyze the data.  I was not able to figure out how to do it though

I anyone of you could help me out w this prob.  i would very much appreciate it!

Kind regards,

Sebastian

__________________________
Sebastian Baumbach
Wimmergasse 15/15
1050 Wien
Austria
Fon: +43(0)650 3514527
mailto: [hidden email]


     
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Re: black background

jmutterer
Sebastian,
You can use the changeValues(v1, v2, v3) macro function to do that.
It will replace all pixels with values in the [v1, v2] range with
pixels of v3 value.

For replacing all black pixels with white pixels in an RGB image, use :

changeValues(0x000000, 0x000000, 0xffffff);

Jerome.


On Fri, Oct 10, 2008 at 12:58 AM, Sebastian Baumbach <[hidden email]> wrote:

> Hey,
>
> I just started working with imageJ.  I'd like to analyze pressure sensitive film, meaning i got a a sample with pressure coded in different magenta intensities.
>
> Is the templates are not completely white, i have created a binary mask and subtracted it from the original image, resulting in a image with a black background and only the areas with magenta left intact.
>
> I would now like turn the black background into a white one in order to be able to analyze the data.  I was not able to figure out how to do it though
>
> I anyone of you could help me out w this prob.  i would very much appreciate it!
>
> Kind regards,
>
> Sebastian
>
> __________________________
> Sebastian Baumbach
> Wimmergasse 15/15
> 1050 Wien
> Austria
> Fon: +43(0)650 3514527
> mailto: [hidden email]
>
>
>
>