Re: distinct curve positions (ascending/descending)

Posted by Herbie on Jul 25, 2015; 3:07pm
URL: http://imagej.273.s1.nabble.com/distinct-curve-positions-ascending-descending-tp5013739p5013740.html

Rainer,

that's where basic mathematics is handy...

Does anything speak against differentiation?

I fear there is no "ready-made" for this purpose because it's so basic.
Just write a little macro.

Best

Herbie

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Am 25.07.15 um 14:23 schrieb Rainer M. Engel:

> Hello everybody..
>
> I'm working on a selection based on a plot profile (pixel values of a
> line), where I want to detect luminance jumps and differentiate between
> ascending and descending.
>
> Here is an example..
> https://dl.dropboxusercontent.com/u/414433/imagej/plots.png
>
> Green: ascending marked
> Red: descending marked
>
> Is there anything I can start from directly available in imagej/fiji to
> get these positions?
>
> Thanks in advance..
> Rainer
>

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