Posted by
vischer on
Jul 20, 2017; 9:03pm
URL: http://imagej.273.s1.nabble.com/Extract-intensities-along-polyline-ROI-tp5019099p5019102.html
Hi Kenneth,
you can use the command Edit>Selection>Interpolate.
For example this macro uses an interval of 8, and for checking
maxima in zz use Array.findMaxima().
newImage("Untitled", "8-bit ramp", 200, 200, 1);
makeLine(40,60,140,70,95,135);
run("Interpolate", "interval=8 adjust");
getSelectionCoordinates(xx, yy);
len = xx.length;
zz = newArray(len);
for(jj = 0; jj < len; jj++)
zz[jj] = getPixel(xx[jj], yy[jj]);
Norbert
On 20. Jul 2017, at 12:54, Kenneth R Sloan <
[hidden email]> wrote:
>
> I want to specify a polyline and then extract image intensities along that
> polyline, preferably with an adjustable step size. Looks easy, but I
> thought I would check to see if there is a standard tool that will do the
> job.
>
> Eventually, this will be a java plugin - I'll probably need to add a few
> complications (for example, searching a small region NEAR the points along
> the polyline for maximum intensity pixels. But, for now, I'm interested in
> quick and dirty, if it exists.
>
> --
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