Posted by
Rasband, Wayne (NIH/NIMH) [E] on
Jan 31, 2015; 5:46am
URL: http://imagej.273.s1.nabble.com/Suggestion-Get-Spline-anchors-tp5011346p5011392.html
On Jan 28, 2015, at 6:40 AM, Norbert Vischer <
[hidden email]> wrote:
>
> The macro below creates a smoothed segmented line, using the 4 points as anchors (or handles).
>
> makeLine(76,222,150,70,357,179,419,146);
> run("Fit Spline");
>
> After editing the anchor points, I cannot retrieve them anymore.
> As there is no "Unspline" command, it would be useful if there were commands like:
>
> Roi.getAnchors(xx, yy)
> Roi.setAnchors(xx, yy)
>
> Then not only the mouse, but also a macro could read and move the handles. And the path could be stored in a much shorter array.
The latest ImageJ daily build (1.49p7) adds three macro functions:
Roi.setPolylineSplineAnchors(x,y),
Roi.setPolygonSplineAnchors(x,y)
Roi.getSplineAnchors(x,y)
And the following macro demonstrates their use.
-wayne
requires("1.49p");
newImage("Untitled", "8-bit ramp", 500, 500, 1);
x = newArray(76,150,250, 419);
y = newArray(222,70, 179, 120);
for (i=0; i<250; i++) {
x[3] -= 1;
y[3] += 1;
Roi.setPolylineSplineAnchors(x, y);
wait(25);
}
for (i=0; i<250; i++) {
x[3] += 1;
y[3] -= 1;
Roi.setPolygonSplineAnchors(x, y);
wait(25);
}
Roi.getSplineAnchors(xx, yy)
for (i=0; i<x.length; i++)
print(xx[i]+","+yy[i]);
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