Posted by
Tiago Ferreira-2 on
Dec 06, 2014; 5:08pm
URL: http://imagej.273.s1.nabble.com/flip-ROI-selection-tp5010816p5010818.html
Dear Liz,
On Dec 6, 2014, at 10:27, Liz Bless <
[hidden email]> wrote:
> I would like a mirror image of the ROI I have made.
The two macros below would do it:
Install them, create a selection, and press F1/F2 to obtain dorsal-caudal/ventral-dorsal mirrors of the active ROI.
These used to be present in earlier versions of the ROI Manager Tools[1], but somehow got removed as were deemed
too specific (they were mainly used for manual quantification of in-situ slices). They could be re-introduced if
you think they are of broader scope. In that case, they would be made available through the BAR update site[2].
To install: Copy the snippet below, paste it into ImageJ, then used the Install command in the editor window.
Hope it helps,
-tiago
[1]
http://imagej.net//plugins/roi-manager-tools/[2]
http://fiji.sc/BAR// Begin of snippet
macro "Contralateral in X [F1]" {
mirrorROI(-1, 1);
}
macro "Contralateral in Y [F2]" {
mirrorROI(1, -1);
}
function mirrorROI(fx, fy) {
roi = selectionType();
if (roi>8 || roi<0)
exit("Cannot mirror current selection");
getSelectionBounds(x, y, width, height);
originalX = x;
originalY = y;
getSelectionCoordinates(x, y);
aX= newArray(x.length);
aY= newArray(x.length);
for (i=0; i<x.length; i++) {
aX[i] = fx*x[i];
aY[i] = fy*y[i];
}
makeSelection(roi, aX, aY);
setSelectionLocation(originalX, originalY);
}
// End of snippet
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