http://imagej.273.s1.nabble.com/Maxima-in-a-plot-profile-tp5003690p5003697.html
> Hi Eric,
>
> Edit>Selection>Straighten works only with lines that are smooth; it does not work if there are sharp corners. Thus, if you don't have 'Spline Fit' clicked to get a smooth line, it does that for you.
>
> Imagine a segmented line with a sharp corner, and you cut out a band with a given width along the segmented line from a rubber sheet. Then you want to straighten it: at the inner (concave) side, when you try to straighten it, it will break. In other words, the pixel values of the straightened selection are undefined.
>
> In any case, I am not sure what it should be good for to straighten a segmented selection that is not splined.
> What's the idea behind it, i.e. why do you need it?
> If you are interested in the profile along the line, you can get it with 'Plot profile' or the getProfile() macro call anyhow.
>
> Michael
> ________________________________________________________________
> On Jun 28, 2013, at 10:09, Eric Denarier wrote:
>
>> Thanks Jerome,
>> That was the problem.
>> But I have an other one : If I draw a segmented line and Edit/Selection/Straigthen, it makes a curve that doesn't overlay the original line. Can it be fix ?
>>
>> Eric Denarier
>> Grenoble Institut des Neurosciences
>> Inserm U836
>> Chemin Fortuné Ferrini
>> 38700 La Tronche
>> France
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