Re: measuring two lines perpendicularly

Posted by Romain Penz on Feb 01, 2016; 10:27am
URL: http://imagej.273.s1.nabble.com/measuring-two-lines-perpendicularly-tp5015503p5015508.html

Dear Herbie,

I need to measure the length and width of spores in µm.

When using the term "manually" I mean to simply use the straight line tool to draw length or width of spore using the mouse or the pad of my laptop to point the starting point and the ending point of each line and then use the measure tool (ctrl+m) ("manually" is opposed in my mind to the measure plugins which can measure automatically some data about ROI). The only thing I need to be automatic is that the second line I draw is fitting to a 90° angle to the first one when I have defined the starting point (even if the two lines are not secant ones, like needed with some spores which look like curved sausages (see the second picture even if the two lines are not perpendicular)).

To see what I want to do I attach a picture on which we can see on each spore two straight lines perpendicular to each other (picture from another software).

Thanks

________________________________________
De : ImageJ Interest Group <[hidden email]> de la part de Herbie <[hidden email]>
Envoyé : lundi 1 février 2016 09:55
À : [hidden email]
Objet : Re: measuring two lines perpendicularly

Dear Romain,

what do you mean by:
"[...] measure manually two consecutive lines [...]"

What do you like to measure?
The intensity profile?

Please be more specific.

Herbie

:::::::::::::::::::::::::::::::::::::::::
Am 31.01.16 um 23:30 schrieb Romain Penz:

> Dear all,
>
>
> Is there a way to measure manually two consecutive lines using the
> straight line tool, the second being perpendicular to the first one
> (automatically fitting to a 90° angle to the first one when drawn)?
>
>
> I've searched for macro or plugin doing this but with no result.
>
>
> I need this functionality to measure fungal spores. So i have to
> measure the length and the width of spores (so two lines per spore)
> and the two lines used to measure these data have to be perpendicular
> to each other.
>
>
> Thanks,
>
>
> Romain
>
> -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html
>

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